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Buick Rendezvous Overheating

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Comments

  • vinoevinoe Posts: 5
    Thanks buddo9 I'll try that.
    But when I start the car to test it to see if it still going to overheat the hood was pop, but still nothing's change the temp still high above normal.
  • ray80ray80 Posts: 1,539
    vinoe, Could be a number of reasons. If you replaced the parts yourself did you properly bleed air out of system with two bleed screws? Have you checked coolant level in radiator (while you at it might as well change cap as it has some age on it). If it was ever run low on coolant (with air in system) the coolant may have gelled creating blockage somewhere . You could check to see if fans work as they should by running vehicle with A/C on full (fans should come on withing a few minutes, both of them)
  • vinoevinoe Posts: 5
    Thanks ray80.
    But I've done everything you said and still the temp goes up past the middle line. I don't know if this is normal or not because before it doesn't go past the middle line until the head gasket problem. I'm just hoping that it needs more bleeding. Thanks again!
  • ray80ray80 Posts: 1,539
    edited March 2013
    'I'm just hoping that it needs more bleeding.' With vehicle on level ground and heater on full.

    One other thought, Not sure on the vous but on the Pontiac version when stuck in traffic the temp gauge sometime would get pretty close to red line before fans work kick in (normal operation), if your old T-stat has a leakage thing going on it might have always run a tad cooler (as coolant would always be circulating and not be stopped by closed T-stat)
  • vinoevinoe Posts: 5
    That's what happened to me before when I got stuck in traffic the temp goes high but when there's no traffic the temp go down but no really down just stayed on the middle line.
    Thanks again I will keep on working with this car hopefully it will go back to normal again..
  • vinoevinoe Posts: 5
    Car is good for now, it's not overheating but still need to replace radiator because i found a leak and i have to replace the water pump too.
  • tunester10tunester10 Posts: 1
    Having the same EXACT problem!!! Now going through the process of elimination. $$$$. If you see this let me know how it went.
  • dlsodlso Posts: 1
    buddo9,

    Dont know if you are still out there but I have a 2006 rendezveuos and it heats up when i am waiting in car pool line etc. I would also like your pictures and will show hubby your post. I think you hit the nail on the head with the bad design by not allowing the heat to escape. Maybe they should be testing these cars in the real world in real world situations.
  • prience24prience24 Posts: 1
    I had the same problem with my 2002 Buick rendezvous. I had intake gasket change twice. Once at 30,000 miles and at 63,000 miles on guage read out. Now I have 83,000 miles and I have the same problems. It's the lower intake gasket. You loose coolant slowly and smell it but not signs. This car has multi problems.
    Gas guage fluxes, AWD light stays on, loosing coolant slowly, all this been repair before and now I have the same problems again. Problem with rendezvous they ride nice, look good, but sucks on liability. This good car for start out mechanic you will get a lot of experience on this car.
  • Have you tried having the coolant changed out? I now use the any vehicle antifreeze by Prestone.
  • My 2002 buick Rendezvous has been overheating..we're changed out the radiator, the water pump, and the thermostat..and its still overheating. Now i've been told its most likely a blown head gasket.. how expensive will that be to fix?? Will i have anymore overheating issues if i get this fixed?
  • I understand everyone's frustration with the Rendezvous, but as an owner of one I will say that they are not that bad. The engine compartment does get overheated, but if this was the total cause it would be so from the factory brand new. Which is not the case. The underlying case is ultimately the intake manifold gaskets are faulty, causing the loss of coolant. In most cases this can cause a head gasket to blow, if overheated. Cracked heads are not to common but warping is. The new updated intake gaskets are much thicker, and better built to handle the heat. Remember this motor, (3.4) is used in over a 100 different GM models.

  • ray80ray80 Posts: 1,539

    @autotech9 said:
    I understand everyone's frustration with the Rendezvous, but as an owner of one I will say that they are not that bad. The engine compartment does get overheated, but if this was the total cause it would be so from the factory brand new. Which is not the case. The underlying case is ultimately the intake manifold gaskets are faulty, causing the loss of coolant. In most cases this can cause a head gasket to blow, if overheated. Cracked heads are not to common but warping is. The new updated intake gaskets are much thicker, and better built to handle the heat. Remember this motor, (3.4) is used in over a 100 different GM models.

    I would tend to agree for the ones made before intake gasket change in 03' All three 3.x engine vehicles we had that were 97-01 models needed intake gasket replacement early

  • I have a 2003 rendezvous and a week ago had the overheating trouble with the light coming on...mine has 118,000 miles I have had it for 2 and a half years. I bought a new radiator because mine had small leak, my boyfrient is a car guy so he installed it...still the next day same problem I pulled over 3 times on my way to work..we then put in new sensor, and thermastat. Still same problem. yesterday we downloaded alldata online draining and filling cooling system, followed it step by step there are 2 bleeder valves under engine block. we used zerex radiator super cleaner...removes tough cooling system deposits. tons of gunk came out. then filled with exactly what it told us..which is a little more than u would expect (antifreeze 50/50) ever since its running like a champ..no more lights coming on fan working properly. just remember its important to pull over and shut it off or you will crack gaskets...block... but this seemed to be a solution for us...I hope it helps.

  • my 2005 Rendezvous started overheating. blew both head gaskets and cracked both heads. had them replaced along with the thermostat and water pump. top part is all new including sensors. a month after spending $2600 to fix it all, it overheated again. shop had it towed in and replaced the water pump again. not even a week later it did it again. now they want to. send it to another shop to see if they can find out what's wrong. anyone have a suggestion? I don't have any more money to put into it.
  • 05 rendezvous started changing thermostat water pump radiator the gauge pegs out hot but car is not overheating still having the problem when the light comes on when its hot shut the car down have not checked for exhaust gases in the radiator or the electrical wiring  near the back of the front seat I have been reading a lot of articles and it looks like one of three  things that it could be wiring computer or cluster if anybody has any suggestions or have recently ran across the same problem please let me know thank you
  • achughesachughes Posts: 1
    I have an 02 Rendezvous that is also overheating. I replaced the engine about one and a half years because of a blown head gasket and put a engine in with 100,00 that was guaranteed for 6 months. Shortly after the engine was replaced, my daughter wrecked the car and busted the radiator and front end. I took it apart and then left it sit for about 1 and 1/2 years before doing anything with it opened to the environment. I ordered an after market radiator, A/C condenser (it was damaged also) & fans with housing. I recently was able to put the front end back together and filled it with coolant. It started up without a problem and let it idle for a while. Within a few minutes, it began to overheat. I shut it off and did some investigating and found out that I had to bleed the system and I did. Now it does not go all the way hot but hovers around the mid point but wants to go higher. I have checked the oil for antifreeze and there is none. I also bleed it again. When I drive it, it does cool down. When it idles, that is when it starts to heat up. I did check and the fans are working.

    Does anyone that follows this have any suggestions about what my be the cause of it wanting to overheat. I want to give this vehicle to my son. Could it be a thermostat, water pump, or the dreaded blown head gasket. Any and all comments welcomed.
  • imidazol97imidazol97 Crossroads of America I70 & I75 areaPosts: 20,218
    I assume you have checked the thermostat. My Buick typically ran with the needle at one temp with the AC on which turns the fan(s) on low speed for both. At idle without the AC on the coolant temp went up from 198 to 217 when it turned on the fans on low. So the gauge would go up markedly from the nominal place on the gauge. But it was not up to the red. I believe on the leSabre, with two fans, the second fan went on high if the temp reach 229 Deg F..

    Since you said it does not move the gauge up when the car is moving, I suggest you find someone with a scanner that can be attached the diagnostic connection that gives temperatures for the coolant. I had bought one to read codes and watch other things that can be checked. You might be able to borrow one from a box store as a loaner. But someone may have one that's a step above the code readers.

    With that scanner attached, I got a digital readout of the coolant temp from the computer's sensor, which is different than the one for the analog gauge on the dash of that leSabre.

    2015 Cruze 2LT, 2014 Malibu 2LT, 2008 Cobalt 2LT

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