Me too! The Dieselpage will update theeir website tonight. He will have the Performance figures for the Duramax against the Powerslug and crummins. He should have a lot more pictures also. He posted the Spec for the Duramax again. He had them on the website back in August. I think GM asked him remove them. Steve Duramax/Allison P.S. No info on the 3600 series today. So we still have more to guess about.And the Avalance. I think that is how it is spelled.
going to Bed The Diesel page updated the site. It was worth staying up. They did a pulloff with the Duramax,Ford and Dodge. The Duramax Is for real.... I thought the Engine was going to be good, but not that good!!!! The Ford and Dodge are waaaayyyy behind. Pulling a 9700lbs Trailer in tow the Duramax whipped their Butts. All had a chance to pull same trailer up 6% Grade. Steve P.S. now I can go to bed with a smile on my face.
Hey guys, take a look at real trucks, pulling real loads. You know, big, bad, over-the road trucks. See any V-8s out there? Didn't think so. If you want to call a V-8 Navistar a powerstroke, or a V-8 Isuzu a Duramax, why you just go right ahead. Real trucks have inline 6 cylinder engines in them. Guru
Hey, thanks for posting the address to see the crew cab pictures the other day. They look real nice, as do the new HD trucks. I'm probably a good 8-10 months away from a new truck, but will probably think about placing an order when they start accepting them for the 2001 models. Did the diesel page give any loaded/unloaded performance numbers for the new Duramax? I have never been a big diesel fan because of the noise, odor, and poor acceleration, but I'm wondering if the new 300 HP engine solves the performance problem. I suspect that the poor acceleration is due to the slow revving nature of diesels, ie. the length of time it takes to get that heavy rotating mass to spin faster, and not really a function of HP or Torque, but I can put up with the noise and smell, if it accelerates more like the 6.0. I love that engine, but don't have enough gas cards to keep it in my garage. I keep a vehicle at least 200,000 miles, so a diesel makes sense for me, if I can live with the way it drives. Thanks for the info, and have a great holiday season.
PS. To the guy with the inline 6 fetish, go ahead and buy a Dodge, and when the truck falls apart you can keep that great engine as a backup generator for your house, and use the body/ chassis for a playground attraction in the yard.
I didn't say anything bad about the engines did I?, No, I said the Dodge, the only pickup available with an inline 6, was going to fall apart before the engine was cashed in. That is a favorable comment about the cummins/inline 6 diesels. And, when did this become a big rig forum? Also, If you want to get technical, a V configuration has the potential to be a smoother running engine, because of the less vibration/harmonic imbalance. Now, this is a mute point for big rigs, as their drivers don't care if it is harsh, and these things are so over built for strength that the vibration has no ill affect on the longevity of the engine. But, perhaps the reason Ford and Chevy use a V-8 is because the general public is a little more concerned about smooth running/quiet engines, than your average long haul trucker? And perhaps the big rigs stay with the inline engines for the narrow packaging capability, but it is certainly not because they have any performance/longevity advantage over a V configuration. Hey, nice talking to you, and when I see you pulling your boat with that Peterbuilt Big Rig Cab, will you blow those air horns for my kids, thanks.
I work for the 1 selling Heavy Duty Diesel manufacturer. Detroit Diesel and the 60 series. And you can have your inline 6. I will take the V8 anyday. The Cummins is the slowest diesel I have ever driven In my life. Rodger350, Happy to help. About the Duramax. I wish I could tell you everything. The Duramax is the King Loaded or unloaded. Pulling 10,000 the Duramax walked all over the Powerstoke. The Cummins was waaaaay back.And the Duramax even had 500 lbs of sand in the Back to make up the weight difference between the Dodge and ford.The Duramax is well ahead of the competition. Join the Diesel page it only cost 16.00 dollars for a year. Just the Duramax Articles are worth that much. They will be posting more and more about the GM HD trucks . Steve
SOver, You are quoting GM propaganda at the moment. There has been no "independent" test of the Duramax yet. Second off--it isn't Cummins fault that they had to de-tune their engine; rather it's Dodge's (and GM with NVG) who can't seem to make a proper tranny for that beast. Only Ford has the overall package right now.
guru, Peterbuilt? Yeah....maybe to an indy but ask any trucker and they'll tell you that their dream is a Kenworth. Same parent but different philosophy of building trucks. Nothing wrong with Freightliner or Western Star as well but Kenworth is the benchmark.
Have you seen the Pulloff? If you have'nt then you need to. I was not quoting GM. And as for the Transmissions Ford is still having trouble with the 6 speed. Don't believe me go to ford-Diesel.com look at all the 6 speed troubles. My uncle just got his 7.3 powerstroke out of the shop 39000 mile trans BLEW up cost him 1,500. Took them 3 weeks to fix because no reman was not available. Ford can't reman them fast enough. Yeh! Ford makes a great Trans? Tell that to my uncle! Steve
In a group this large you can always find one guys who knows someone who's Chevy 6.0 or ford 5.4 or Dodge V10 blew up. Same goes for transmissions. So how are we to know how serious problems are? The Dodge 5 sp man seems to have a good rep, hear rumors their new 6 sp won't stay in gear. And although I've never met anyone who had trouble with the Dodge auto at a campground, it seems to have a bad reputation on this site. Chevy auto and man 5 sp seem to both be ok for the engines the have but havn't had anything more than the 454 to stress them. But a diesel really needs a 6 sp man or 5 sp auto. Ford is the only one that has really delivered any quantity (6 sp) so they are the only one that could have problems. But what percentage? The Chevy Allison 5 sp should be great with the Duramax, but I have a question. Chevy says its a new version of the 1000. that worries me. I hope its not a cheap knockoff taking advantage of the Allison name. But perhaps we will know more by the time Chevy gets production in gear about 2003. ... Rich
The Allison is a new design. It will replace the AT500 series in the future. The 1000 series is the First Allison with a Parking Paw. The 1000 series has to other Brothers if you would say. the 2000 and the 2400. The 2000 has a lower gear ratio and no Parking paw, the 2400 has the same ratio as the 2000 but has a parking paw. The transmissions will have been in production for over a year when they come out in the GM pickups in August of 2000. And on the Ford trans thing the case was bad. Ford said it was common. 1000 series- 375hp 545ft Lbs torque 26,000 GCW. 2000 series- 330hp 545ft Lbs torque 30,000 GCW 2400 series- 330hp 545ft Lbs torque 26,000 The 1000 series is doing very well it shifts like a dream. It is going to be much better than Ford or Dodge has, Until 2003 when Dodge also gets the Allison. All of transmissions are 5 speeds. But if you would like to know it can be a 6 speed if the TCM was programed for the 6th gear.
I forgot to tell you the 1000 series is a true Allison.Allison will build the trans in Maryland at its own New Plant. It's Not a GM powertrain transmission. GM is buying the trans from Allison. Rocles, (I know GM owns Allison) But the corporation is so big that Allison sells the trans to GM for the Pickups. Thats the way it is going to work.
The Ford competitor for the Duramax won't be the existing 7.3L Powerstroke. It will be the second generation 6.0L Powerstroke that will be introduced in the Fall of 2001. The initial figures are 310hp and 550 torque, which are slightly higher than the Duramax. The test that will matter will be the test of what is currently available from each manufacturer, not what someone is field testing. At most the Duramax will be out there for one year against the current offerings from Ford and Dodge. This should help Chevy improve their market share in this area. However, if Ford starts hyping it's new diesel around the time the Duramax is being introduced, some people will wait.
Hopefully, the Duramax will be the great engine that many are anticipating, but it won't be heads and tails above what Ford will have available. If Chevy wants to get in line with Ford and Dodge who have been leapfrogging over each other every few years with performance gains in their diesels, all I can say is welcome aboard. It's about time.
Blueovalnews.com is saying 2002 will be the last year for the 7.3 and the 6.0 will replace it in 2003. They also say 305hp and 550ft lbs. If the numbers on 0-60mph times from blueovalnews are correct the Duramax is faster. It does look like GM has stepped up to the plate. Now maybe they can knock it out of the park. Steve
Feedguru1, I'm not sure what you are saying, is it that you think GM is ashamed to say Isuzu? The Duramax is like Powerstoke, Vortec, or any of those Names that make people relate to the product. That is what I think your saying. Z71, Where the hell have you been? It has been a MAD house around here. Holding the wolves off with a Swiss knife. HELP!!!!!!! LOL Rocles, I guess they will be the only Oem using NVG. I found out, and i'm not sure if it is true. Dodge has decided to not use Dana axles in the Next generation Ram. Look at www.car-truck.com they got the info from the Detroit Free press. Steve
I didn't mean to desert you! I have been off fighting another war with ducks (duck hunting), but I'm back now. Did you read that the Alli transmission will have a spin-off oil filter? Pretty cool, huh! I hope it has a drain bolt, too. Have you read the info on the 6.2/6.5 page? Are you a member?
Thanks for all the great information. I signed up for the diesel page yesterday. I can't wait to get my ID and Password!! Thanks again, and everyone have a great Holiday!
thanks for the info on the pickuptruck.com forum page. I havn't seen their new forum yet. It seems like there are some people like us there that are waiting in line to order one.
What do you think of the Duramax, now that you are a member of Diesel Page? Was I lying about the performance? Do you think the GMs have a good shot at taking the #1 selling truck away from old blue? Comments anyone, SteveO
There seems to be allot of huffing and puffing about something that has not seen the light of day. If the Duramax/Allison is going to be such a WORLD BEATER, just what is this going to cost? I know the Allison 5 speed is 10K exchange on a rebuild, just what is this going to cost? Something was said about Cummins being a slug, there may be allot of slugs waiting in the wings, to remove some doors. I know of one that has 284 hp at the rear wheels, with a automatic. Ford knows its engine is Internation, Dodge is Cummins, why does Chevy call the rice burner by another name? Why not be proud of it, It is a good engine, although many are wondering about the use of aluminum heads. how many real diesels are using an aluminum head? It is good to see GM stepping up, just hope it is not at the buyers expense.
I can answer just about everyone of your questions. First what Allison costs 10,000 dollars exchange? I work for Allison and a MD3060 is about $3500.00 exchange from Allison Reman. Second the Allison/Duramax will be very competitive with the Cummins and Powerstroke in price and Performance. Your Cummins will be getting the Allison in a couple of years. Third, The engine is called a Duramax because it is like anything else a product "Catchy Name". GM has the Vortec Dodge has the Magnum. Ford has the Triton, and the Powerstroke(the 444e is what Navister calls it). Fourth, They are using Aluminum for a couple of reasons Weight, ease of manufacture(aluminum is much easier to make). and the most important is Emissions. And one last thing The next generation Powerstroke will be a 6.0Liter that is over 220 lbs lighter than the current Diesel. How do you think they are losing the Weight? The Duramax has seen the light of day it is going through Cold weather testing in Colorado at this moment, Pulling A lot of weight, with power to spare. GM has been testing the engine for over 2 years and by the time the first truck hits the road The engine will have more test time than any Engine GM has ever produced,Gas or Diesel. It has went Head to head with the current Dodge And Ford trucks and it did very well. If you would like to see the engine for yourself check out www.62-65-dieselpage.com . That is the place for any and all info on the Duramax. They will be doing a kinds of articles on the Duramax/Allison. The engine and Trans are all MADE in the USA. I have a Question; Is it true that if you buy a Exhaust brake for a Cummins/Dodge with the Automatic, Dodge will Void the Warranty on the Automatic? Great Questions! Keep asking the questions that need answered. Hope I have Helped, SteveO
it is getting a little rough around here. Look y'all, we chevy lovers are just excited about the prospect of getting a real diesel. That is what all the excitement is about. (I still wish that they had went with CAT, though. THAT would have been cool!)
I understand your excitement. It will only be good for all. Steve, can you get me an address, website, or something for these prices, as ours are allot higher. But, maybe these are apples and oranges. I have been the 6.5 site, I'm impressed, but have reservations about aluminum heads on a diesel. It has been tried before, and they went back to iron. The prospect of a very quiet diesel is appealing, if it still has power. Wildman
Chevy lovers should be proud of the Duramax, at least from everything we've heard. I'm pretty much a Ford loyalist, but the question has to be asked. If Dodge did not have Cummins and Chevy did not have Isuzu, would Ford be as far along in the production of the new 6.0L as they are now? I doubt it. Competition is what drives up the quality of the product and drives down the price. Regardless of which manufacturer you like, we all win by competition. If Chevy takes some market share back, Ford and Dodge will be all the busier trying to take it back again.
With the new diesels looking like they are going to be cranking out over 300hp and delivery mid to upper 500s in torque, I'm pretty sure my next truck purchase in 4-6 years will be a diesel. As long as you can get beyond the initial out-of-pocket investment, most of the advantages of the gas engines are starting to disappear.
The trans range from motorhomes up through mixer trucks. There is no one trans that is used for many apps. These are some verry reasonable prices that you have stated, and would like to get in on these. The the price for the AT545, could even convert Ford/Dodge trans to Allison, for less than the price for a factory exchange. It seems like all the diesels will be about the same size, this should make comparisons real easy. Like Brutus said, this will be good for everybody. 500 ft lbs of torque seems like a low figure. It doesn't take much to get the Cummins above 600, especially on the 24 valve.
I got the prices straight out of the Allison reman catalogue. I'm sure the prices vary from state to state. What do you do for a living? I would not consider installing an AT in my truck. It will not take 600Ft lbs. It has no Overdrive. All hydraulic controlled. But if I could; I would install a MD3060. It is a 6 speed,Fully electronic 4th gear is 1:1, 5th(0.75:1) and 6th(0.65:1) are overdrives. Rated at 275HP and 800Ft lbs Torque. But it is very Heavy(575Lbs). And to buy one straight out(no Core) would be very expensive. Thanks, SteveO
Chatted with my uncle over some holiday cheer, recently. He works at an authorized Allison and Detroit dealer/shop. He recently had Allison area engineer come thru and got to see and discuss the new 1000 series that will be in the GM trucks.
Said the transmission itself was a heavy, yet simple design. Very modular, easy to work on. He said the unit probably weighed about 300 lbs. He said the design was leveraged so that heavier versions could be used for higher duty constraints, which would be the model 2000 and 2400 (??), likely used in the 3500HD, then the 2-ton series.
Overall he said he was very impressed with the transmission. His shop runs lots of F450/550s and Chevy 3500 HDs. All his trucks are equipped much like my fathers: tool body, crane, air compressor, acetelyne tanks, tools, adding up to a GVW of ~13000. He has trouble with all Ford automatic trans, most of them lasting less than 80K miles. A little better luck with the GM automatics, lasting little over 100K. They put close to 50K miles per year per truck, so they see how durable these trucks are in a short time. Generally, automatics can’t take the weight that they run with these trucks. They have several manual transmission also, but they have become no less expensive to run. The manual transmissions last a little over twice as long as the automatics, but replacing a manual trans is super expensive (over $5K for GM and Ford).
My point is, that the Allison is expected to by far outlast both current manual and automatic transmissions. He saw the Allison list price only: he said it was about $5000. This is the outright, from factory purchase. This puts the transmission option for GM trucks in the $2000-2500 range. Twice as expensive, but you’re buying a transmission, that for the first time in trucks, should outlast the rest of the truck, maybe even engine! To get a current factory HD automatic over 200K miles is costing them between 4-5K. Plus the engine is very easy to work on, so if one gear or clutch pack burns or wears out, it is quickly and easily replaced. Don’t expect the replacement parts to be cheap, at all, though!
For his company, the Allison/Duramax combo is a godsend. His trucks are only getting about 7 mpg out of their V10s and 454s. they are getting about 9-10 mpg out of their Powerstrokes, along with very high maintenance cost.
Not sure that average Joe-Schmo can benefit from these high-cost, heavy duty powertrains. I’ve preached that for a while around here .
Also he said the design has the capability of adding a sixth speed, like a super OD.
Forgot to mention that GM is going to have Allison shops doing all warranty work on the tranny next year. GM will not be touching the transmission. The key word in the mandate was "next year". Maybe the year after, (2002) GM shops will be equipped and trained in the product. nonetheless makes it very difficult for my uncles shop to invest in tooling for this transmission, when they may only get one years worth of work.
Thanks Sovercash. I thought the 2000 would have a parking paw.
What have you seen on price? my uncle saw a list price of $5000. We just assumed from that figure that option price would be around 2 grand. Do you think less than $1500?
What's your take on the longevity, similar to mine?
1500.00 is close maybe lower. Allison is doing a very good job at Quality control. I have seen a couple that where assembly line mess ups, but not many. Like I said this is a great transmission it will have over a year of production under "It's Belt" when you or I go to buy one. I think GM should have done this a long time a go. You said the trans may outlast the truck. I have no doubt it will last twice as long as anything out on the market today..... The entire package that Chevrolet/GMC are going to offer will kick Ford on there cans. I know for a Fact the only limiting factor in HP/Torque of the GM engines for 2001 is the Transmissions. But Allison has always under rated there transmissions for the first couple of years. Then when they feel good about the product they let the Horses run wild.
I have some pictures for you to look at. To me they look 2001 Brochures. www.eieck.com/public/index.html Do a search for 2001HD Sierra it should give you about 8 to 10 pictures of the trucks. I could not take my eyes off of the pictures. GM will sell the heck out of the trucks.
Hey, been away from the computer for a while. The Diesel Page was definitely worth the $15!!! I can't wait for these trucks to come out!!! Man, I was amazed at how great the Duramax performed. I don't care what all the detractors want to say about Ford and Dodge coming back in another year and putting the Duramax at the bottom of the heap again. The point is, regardless of who is winning the current power war, all three will be awesome, and for those of us who are loyal to GM, we can finally buy a Diesel and be proud. Instead of settling for a Ford we really don't want, or a 454 or 6.0 that runs the tank dry every three miles! This is great progress for GM. I hope it improves their market share, and people realize they don't have to put up with trucks that ride like tanks just to get a good diesel. But in the end, I don't care what everyone else thinks about the new engine, I just want to get one in my driveway this fall!! Hope everyone had a good holiday, talk to you later.
Thanks, Thats what I have been thinking too..An more people everyday..Now that you are a member of The Diesel Page there is a Q@A mailing list that is e-mailed to you everyday if you like. There is more and more questions about the Duramax. Take a look under the members page It's called The Diesel Page Mailing list. GM engineers dropin from time to time.
Could any of you comment on your experience with GM's proposed ind. front suspension. I know they have beefed up their compnenents but why try to make a great heavy duty truck ride like a car? Thanks
I love IFS. I have a 1993 K2500 with the HD C6P option. 150,000 mile no problems. The 2001 HD trucks are going to be even better.
If anyone is interested in the Performance of the Duramax and Allison pickup the March edition of FourWheeler Magazine. FW was at the Pulloff in October that www.TheDieselPage.com held to show the Power of the New Diesel..
Just saw a Duramax model at auto show. Looking at the design raise a few questions: 1. Why use piston "splash" cooling instead of use oil passage from crankshaft to connecting rods to piston pins to piston oil galley? 2. Will breathing be improved if both intake valves are on the inside of V and exhaust valves on the outside? 3. I didn't see any cylinder lining. Can the block be rebored? 4. (I don't remember correctly) Somewhere I read that Duramax 6600 has service life of 200K but Isuzu 4.7 (Duramax 4700?) has 300K. What is the difference in design? I don't know much about engines especially diesels but like to know more about it.
1. The Duramax uses "Oil Jet Cooling" Oil is fired up into a Channel in the bottom of the Piston. As the oil makes it's path around the piston it cools and lubricates the piston. Then as the oil comes out it splashs on the other components. Isuzu feels this is the best means of cooling. 2. The Duramax uses a "Modified Cross Flow" for the intake and exhaust valves. They are slightly offset and a Bridge is used to activate both valves at the same time. It gives the Intake and Exhaust a swirl effect, helping to improve combustion. 3. It is a "Parent Bore"(No Liners) design and can be rebored. 4. The specifications from GM to Isuzu where for an engine with at LEAST a 200K useful life. The Duramax meets and Exceeds those specifications.
Comments
Real trucks have inline 6 cylinder engines in them.
Guru
PS. To the guy with the inline 6 fetish, go ahead and buy a Dodge, and when the truck falls apart you can keep that great engine as a backup generator for your house, and use the body/ chassis for a playground attraction in the yard.
guru
You are quoting GM propaganda at the moment. There has been no "independent" test of the Duramax yet. Second off--it isn't Cummins fault that they had to de-tune their engine; rather it's Dodge's (and GM with NVG) who can't seem to make a proper tranny for that beast. Only Ford has the overall package right now.
guru,
Peterbuilt? Yeah....maybe to an indy but ask any trucker and they'll tell you that their dream is a Kenworth. Same parent but different philosophy of building trucks. Nothing wrong with Freightliner or Western Star as well but Kenworth is the benchmark.
Hopefully, the Duramax will be the great engine that many are anticipating, but it won't be heads and tails above what Ford will have available. If Chevy wants to get in line with Ford and Dodge who have been leapfrogging over each other every few years with performance gains in their diesels, all I can say is welcome aboard. It's about time.
guru
What of NVG transmissions now? Will Dodge use them exclusively now?
Roger
Wildman
One question: Who do you work for? Is it Detroit Diesel as claimed before or is it now Allison?
Roc (Okay--it was a two-parter)
Steve, can you get me an address, website, or something for these prices, as ours are allot higher. But, maybe these are apples and oranges.
I have been the 6.5 site, I'm impressed, but have reservations about aluminum heads on a diesel. It has been tried before, and they went back to iron.
The prospect of a very quiet diesel is appealing, if it still has power.
Wildman
With the new diesels looking like they are going to be cranking out over 300hp and delivery mid to upper 500s in torque, I'm pretty sure my next truck purchase in 4-6 years will be a diesel. As long as you can get beyond the initial out-of-pocket investment, most of the advantages of the gas engines are starting to disappear.
It seems like all the diesels will be about the same size, this should make comparisons real easy. Like Brutus said, this will be good for everybody. 500 ft lbs of torque seems like a low figure. It doesn't take much to get the Cummins above 600, especially on the 24 valve.
Wildman
Said the transmission itself was a heavy, yet simple design. Very modular, easy to work on. He said the unit probably weighed about 300 lbs. He said the design was leveraged so that heavier versions could be used for higher duty constraints, which would be the model 2000 and 2400 (??), likely used in the 3500HD, then the 2-ton series.
Overall he said he was very impressed with the transmission. His shop runs lots of F450/550s and Chevy 3500 HDs. All his trucks are equipped much like my fathers: tool body, crane, air compressor, acetelyne tanks, tools, adding up to a GVW of ~13000. He has trouble with all Ford automatic trans, most of them lasting less than 80K miles. A little better luck with the GM automatics, lasting little over 100K. They put close to 50K miles per year per truck, so they see how durable these trucks are in a short time. Generally, automatics can’t take the weight that they run with these trucks. They have several manual transmission also, but they have become no less expensive to run. The manual transmissions last a little over twice as long as the automatics, but replacing a manual trans is super expensive (over $5K for GM and Ford).
My point is, that the Allison is expected to by far outlast both current manual and automatic transmissions. He saw the Allison list price only: he said it was about $5000. This is the outright, from factory purchase. This puts the transmission option for GM trucks in the $2000-2500 range. Twice as expensive, but you’re buying a transmission, that for the first time in trucks, should outlast the rest of the truck, maybe even engine! To get a current factory HD automatic over 200K miles is costing them between 4-5K. Plus the engine is very easy to work on, so if one gear or clutch pack burns or wears out, it is quickly and easily replaced. Don’t expect the replacement parts to be cheap, at all, though!
For his company, the Allison/Duramax combo is a godsend. His trucks are only getting about 7 mpg out of their V10s and 454s. they are getting about 9-10 mpg out of their Powerstrokes, along with very high maintenance cost.
Not sure that average Joe-Schmo can benefit from these high-cost, heavy duty powertrains. I’ve preached that for a while around here .
Also he said the design has the capability of adding a sixth speed, like a super OD.
What have you seen on price? my uncle saw a list price of $5000. We just assumed from that figure that option price would be around 2 grand. Do you think less than $1500?
What's your take on the longevity, similar to mine?
Like I said this is a great transmission it will have over a year of production under "It's Belt" when you or I go to buy one. I think GM should have done this a long time a go.
You said the trans may outlast the truck. I have no doubt it will last twice as long as anything out on the market today.....
The entire package that Chevrolet/GMC are going to offer will kick Ford on there cans.
I know for a Fact the only limiting factor in HP/Torque of the GM engines for 2001 is the Transmissions. But Allison has always under rated there transmissions for the first couple of years. Then when they feel good about the product they let the Horses run wild.
SteveO
www.eieck.com/public/index.html
Do a search for 2001HD Sierra it should give you about 8 to 10 pictures of the trucks.
I could not take my eyes off of the pictures.
GM will sell the heck out of the trucks.
SteveO
SteveO
Thanks
If anyone is interested in the Performance of the Duramax and Allison pickup the March edition of FourWheeler Magazine. FW was at the Pulloff in October that www.TheDieselPage.com held to show the Power of the New Diesel..
www.chevrolet.com/duramax/index2.htm
Lots more to come.....
SteveO
1. Why use piston "splash" cooling instead of use oil passage from crankshaft to connecting rods to piston pins to piston oil galley?
2. Will breathing be improved if both intake valves are on the inside of V and exhaust valves on the outside?
3. I didn't see any cylinder lining. Can the block be rebored?
4. (I don't remember correctly) Somewhere I read that Duramax 6600 has service life of 200K but Isuzu 4.7 (Duramax 4700?) has 300K. What is the difference in design?
I don't know much about engines especially diesels but like to know more about it.
Correction: Should be Isuzu 4.8L
the piston it cools and lubricates the piston. Then as the oil comes out it splashs on the other components. Isuzu feels this is the best means of cooling.
2. The Duramax uses a "Modified Cross Flow" for the intake and exhaust valves. They are slightly offset and a Bridge is used to activate both valves at the same time. It gives the Intake and Exhaust a swirl effect, helping to improve combustion.
3. It is a "Parent Bore"(No Liners) design and can be rebored.
4. The specifications from GM to Isuzu where for an engine with at LEAST a 200K useful life. The Duramax meets and Exceeds those specifications.
SteveO