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Comments
My 2003 CC has gotten very little open road or expressway driving in the last two months (My daily drive to work is 2.4 miles). Under these conditions I was averaging about 17 MPG, but since the cold weather hit us it has dropped to the mid 14s, with one tank dipping to 13.92.
In a lot of December and January driving I noticed that the cold temperatures kept the transmission from going into overdrive. One morning I drove more than 8 miles before she went out of third.
All this eats fuel on a engine that has lots of power.
regards,
Dusty
So you're saying that HEAT is the problem for warpage and that's why you went to the slotted type rotor? Is Powerslot the only brand? I can't seem to locate any in town. Ahasher had mentioned Pep Boys, but I had no luck with them. How do you season rotors?
Another question I have is .."Are all brands of ceramic pads basically the same? What am i supposed to look for?"
PS.....thank you dusty, mopar67 and bpeebles for your comments.
Yes I beleive that HEAT is the reason that ALL brake-rotors warp.(due to uneven tempering)
Lug nuts that are unevenly/over torqued can cause uneven expansion when the rotors get hot. Water splashed on hot rotors may cause warpage. Agressive stopping then HOLDING THE BRAKES will cause a hot-spot under the brakepads and promote warpage.
Some folks wait til the last moment and slam on the breaks. During my driving training, I was taught to look far ahead and PREDICT the braking needs and leave 1 car-length for every 10MPH. I also use downshifting to help slow the rig. Very rarly do I have to use the brakes very aggressivly.
The 'seasoning' I mentioned is actually a tempering process that changes the molecular structure of the metal in the rotors. Check out this URL: http://www.shotimes.com/brakes/part1.html
Gee... I am only aware of only ONE brand of brake pads that are ceramic-based (Raybestos) What others are you aware of?
When a rotor is overtorqued, you will usually not notice any runout (pulsing) problems. However, after they get hot the rotor will take "set," so to speak, reflecting the torque pattern. That's how they get warped from overtorquing.
I think that newer Dakota's are getting a much better rotor nowadays. My service manager did say that on "older models" rotor life was a problem and Chrysler has changed primary vendors for these parts since the late '90s. I know about a dozen Dakota owners and the 1999 and up vehicles don't seem to have a rotor short life problem.
Anyway, I hope that stay true for mine!
Regards,
Dusty
Well, I could be wrong, but I actually think that what I felt was the difference between 4th and 5th, not just converter lock-up.
In fact, just the other morning I noticed that switching the overdrive off revealed no difference in RPM nor did I feel anything. This was after I counted shifts. Then about a minute later it did shift into the next higher gear as the RPMs dropped. At this time I thought it was in 5th, but another mile down the road and sure enough I felt another shift.
I can't say I've ever felt the torque converter locking, so I'm still unsure. But I don't think converter lock is going to drop the RPM very much.
This 545RFE is to darn smooth you really have to pay attention to notice the shifts.
Best regards,
Dusty
Gas mileage is as other have stated. I drive 17 miles each way, mostly back windy roads, lots of stops. I've been averaging 15-16 during the winter. I think I usually get around 17 during the warmer months. I once got over 21 on a 180 mile trip home from the hunting camp. That was because I just left it in overdrive the whole way and did 50 mph on most of the roads home.
Also, if anybody remembers, I had a strange whirring noise come about at the end of last summer when I would engage the AC. Local dealer dropped a new AC compressor in and everything is ok now. Dunno if it would have lasted or not, but they were happy to replace it, so I don't care.
2001 QC 4x4 5 speed.
Sorry for not getting back sooner. But the other ceramic brake pads were from Bendix and Napa. I recently found out that Bendix doesn't have any for the dakota.
By the way, I found another Dakota web site (dodgedakotas.com) and they are having a group buy on the powerslot rotors. Someone there posted that his powerslot rotors lasted 30,000 miles. How long do rotors normally last? That seemed a short period of time.
I'm not sure exactly what the 60mph RPM is. I think its around 1800 RPM. I'll check tomorrow.
Dusty
hint... look for DML (Dakota Mailing List)
That "group buy" that you refer to is the EXACT SAME ONE that we all use for powerslot rotors. The people over at dodgedakotas.com tend to be more into performance... they wear out parts all the time. They also rip their engines apart and install the "HO" cams from the Jeep engines. Your millage may vary ;-)
Do not forget that the ceramic-based pads are rough on the rotors. (as compared to organic pads)
With that said....
I have NEVER seen any rotors wear out. Most often, I have seen them get so rusty that they are no longer serviceable.
I am speaking from over 20 years of replacing rotors on my vehicles. I do all of my own brake work because I want it done RIGHT. Most shop-monkeys do not take the time to file-smooth the rusty contact points or apply the special lube so the brakes do not drag. Also... it is IMPERATIVE that the braking-surface of the rotors is not touched by human hands. Copious amounts of IPA should be used to degrease all braking surfaces. Any residual oils/grease will become imbedded into the grainular-structure of the steel and may cause uneven braking or warpage over time.
I put 106,000 miles on my Nissan rotors and they were still within thickness specification.
And on that subject, the correct way to resurface brake rotors (and even drums) is to grind the surface using a stone. Most shops use a lathe with a cutting tool. It's okay, but the surface is nowhere as uniform or consistent.
Dusty
Okay, at 60 MPH my RPM is approximately 1600 RPM.
Bests,
Dusty
Thanks in advance.
Bill
Just open the hood, reach behind the headlight assembly, and give the bulb-socket a 1/4 twist to the left. Then remove the old bulb and place the new one into the socket.... reinstall the socket back into the rear of the headlight assembly.
As I recall the passenger-bulb requires some contortionist moves to get to it... but it is possible without any tools. (HINT... where you STAND when you reach in is the key.)
Bookitty
Ben
This sounds like the PCV system. (Positive Crankcase Ventilation) This system has been installed on all internal combustion engines for over 20 years (even a lawnmower has PCV)
Basically, a slight vacuum is maintained inside the crankcase... drawing all of the noxus gasses off of the oil into the engine intake manifold so they can be safely burned up inside the combustion chambers.
A PCV system consists of 2 portions.
1)An 'intake side' where filtered air is piped into crankcase.
On the 4.7L V8, this 'intake side' consists of a small tube that comes out of the the Air-filter housing and splits to feed fresh-filtered air into the top of each valvecover. (These may be the tubes you ar refering to)
2)The 'outlet side' where the noxus gasses are piped into the engine intake manifold. There is one-way valve known as the "PCV valve" where this piping connects to the crankcase.
On the 4.7L V8 engine, the PVC valve is plugged into the side of the oil-fill tube. There is a KNOWN issue wheras this oil-fill tube can become filled with an oil-water emulsion. (White, smelly foamy stuff)
It is VERY HIGHLY RECOMMENDED that the oil-fill tube be wiped out every couple of weeks during cold weather. The 'baffle' should be pulled out to do this. If this is not done...the PCV valve may become plugged up and problems such as those you describe may occour.
Dusty
Ben
I suspected my 2001 Owners manual was incorrect as soon as I looked at the headlight assembly as the pictures/procedures in the manual do not match the vehicle. Yes, I'll be wearing gloves when installing the new PIAA bulbs. I sure hope this upgrade is going to be worth the effort and cost.
Thanks again.
dataguru
The oily foam is the result of moisture collecting in the engine. In extremely cold or high humidity conditions, this moisture gets into the engine. The moisture will not be a problem if the engine comes up to temperature and is operated long enough to purge out. But when the the trips are short the moisture cannot be consumed by the engine and collects in the oil.
This is NOT a problem that just affects the 4.7 engine or Dodge for that matter. We have had an even more severe problem with this on our '99 Toyota Avalon. And friends with all sorts of different cars and trucks experience this, too.
Regards,
Dusty
Can I assume that you ALLREADY have changed the gearbox lubes (tranny, xfer case, front&rear axle)
Ron
My Nissan PU had a clutch bleeder-nipple.
Even my motorcycle has a clutch bleeder-nipple!
I guess I will have to consult BOB (Big Orange Book) to see what it says.
DONT HOLD YOUR BREATH.... It has not gone above freezing yet this year. Once the weather warms up (around mid-April), I will be able to get under my truck in the driveway.
material that is used in the 4.7L V8 engine but I never really knew what CGI was until now.
The CGI is used to replace all of the main bearings with a sort-of engine-girdle. The entire bottom half of the 4.7L engine is CGI.
This is one reason that the 4.7L engine is soooo smooth. (There is virtually no lateral flex of the engine block.) This also allowed the engine-designers to tighten the clearances of the 4.7L V8.
Here is an artical that describes how unique this CGI material really is.
http://www.sintercast.com/articles/pdfs/TWST.pdf
Thanks.
Bill
The CGI girdle (Chrysler calls it a bedplate) does not really replace the main bearings. The 4.7 still uses a standard bearing like most other engines. The girdle contains all of the main bearing caps as part of a one-piece assembly that fits onto the bottom of the engine.
An SAE technical paper said that this technique reduced torsional twisting of the engine block by something like %38 (the number may not be right cause I'm old!).
Thanks for passing on the info about CGI. It was quite informative.
Bests,
Dusty
You are correct that this girdle replaces the main BEARING CAPS. (not the bearings themselves) From my read of the factory shop manual, there are over 14 bolts clamping this thing on... It is also GLUED on with special adhesive.
Perhaps you are not aware of all of the moving parts in the driveline that suffer from "CHURN".
There is the front and rear differential, the xfer case and all of the moving parts in the tranny. (I have the manual)
The BIGGEST improvement with synthetic lubes is the reduction of CHURN. (due to the much thinner oil)
I would not expect the auto tranny to see as much improvement. Its lube is ALREADY synthetic from the factory starting in 2001.
I am going to change the plugs but now don't know if I want Bosch or something else. Seems there was a discussion if Bosch was correct for this engine ???
Next, I will be changing the auto trans fluid. I just changed the differential to Red Line but since the Auto trans fluid is allready synthetic, should I be going to Red Line there also? I have a local garage that removes the fluid with a machine at the cooler line at the radiator, uses a cleaning agent and flushes the whole thing getting all the fluid out.Then, he would replace with whatever I decide. ( 15 quarts I believe)The question is, would I be gaining anything with Red Line? Greater interval between servicing would be an advantage.
Any comments would be appreciated.
In Atlanta
Dusty
I just had my tranny serviced (01 4.7 QC 4x4) at 30,000 miles and went through the same questions. I decided that ATF +4 (from mopar) is semi synthetic, I have had little to no problems with the current fluid, I'm going to change the fluid every 30,000 from here to eternity, and came up with this. Why spend the $ on a flush and upgrade to AMSOIL and or Redline? I understand the reasoning, but I spent my money on plugs! Denso Iridiums! I like a lot!!! That coupled with the fact that my dealer was running a special for fluid change ( I think is was $50.00) I went the Mopar ATF +4. That is not to say at 60,000 i wont go Redline.
Redline and AMSOIL are more than likely a little better product, but I'm not that hard on the tranny anyway.
Blue
Well now my horn has lost part of its sound. It now sounds like a Yugo/kitten and is real quiet.
I am at about 32k miles, so I am hoping this will be the last problem out of this one.
Robert
The horns are mounted on the drivers-side of the radiator. (sorta near the battery.)
Since the horns are a SAFETY item (just like seatbelt or airbags) They fall under the federal warantee for safety items.
Robert
I've never been a fan of Bosch plugs. Can't tell you why, just haven't. I didn't really want to go with platinum, as they don't produce as good of a spark as a standard copper plug. They work better than a standard copper plug after several thousand miles, but I'll just clean my plugs it I have too.
Enter the Iridiums. First off... They are oh so expensive!!! Second... I think they are worth it! Third... I got mine fairly cheap, If i remember correctly, about 8 to 9 a piece. The trick is to find some import auto website that sell alot of them to the high perfomance croud and they will have sales everyso often.
None the less, I have little to no mods on my truck. drop in K&N, and my iridiums. After going from cleaned 5224's (autolites) to my iridiums, I saw a noticable improvement in idle (cold and hot). Any stumble or drop in rpms when sitting at a light ceased. Throttle response was instantanious. Power was much better through out the rev range.
Don't get me wrong! Plugs will have a minimual impact in total horsepower, but I can honestly say that all of these improvements were noticeable. Research shows that the iridium plug is a superior plug to all others, it just comes at a price, and the benefits are greater the higher strung you engine is. I don't think I would even try them in old tech engines.
Oh yea... that was 20,000 miles ago, with no problems/drop in performance that I can tell.
Blue
AS FOR OTHER THINGS, I HAVEN'T HAD ANY PROBLEMS WITH MY BRAKES OR ROTORS...SAME ORIGINALS....I GO THRU EVERY WATERHOLE I SEE. BEING A CONTRACT GM DESIGNER AND PREVIOUSLY OWNED ONLY GM TRUCKS, IT IS REAL NICE TO HAVE THE SAME BRAKES FOR THIS LONG. ON ALL MY GM'S, IT SEEMED LIKE I HAD TO REPLACE EVERY 12000 MILES.
NOCK ON WOOD...I LOVE THIS TRUCK! FIRST TIME DODGE BUYER AND HAVE NO REGRETS! I JUST WISE MY CHEVY'S PERFORMED THIS WELL!
THE SHOCKS WILL PROBABLY BE THE NEXT THING TO REPLACE. I HAVE INQUIRED HERE ABOUT SHOCKS AND HAVE GOOD RESPONSE. I HAVE CALLED BILSTEIN, BUT THEY HAVEN'T COME UP WITH A REAR SHOCK FOR THE QC WITH THE "TUNED SUSPENSION OR TIRE PACKAGE". OTHERS HAVE MENTIONED THE EDELBROCKS...MAYBE THAT IS WHAT I WILL GET!
Thanks
Ron
I'll have to try and dig up the info when I get home.
Will try and get back to ya by tomorrow.
KingQuad1:
I do have the edelbrocks IAS performer shocks. Love them. They seem to do everything that they claim. I know several on this board have them, and I don't think anyone have a bad thing to say about them.
Blue
Please turn Caps lock off, it's the same as YELLING in the e-mail and message board world.
And your messages are harder to read,,,,
Thanks,
mick