Last post on Oct 06, 2013 at 4:45 PM
You are in the Buick Rendezvous
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Buick Rendezvous, Electrical, SUV
#18 of 137 CX-CXL overheating probs,,
Jun 05, 2010 (6:43 am)
In the 2002 and later Buick CXL Rendezvous..
The overheating problem will never go away!
I realized there was a problem when I raised the hood and tremendous gust of heat hit my face!
The engine is in a restricted compartment area under the hood with very little exit to remove heat buildup!
The heat just keeps building up! So badly, it blisters the paint at the only escape rout that it has near the rear center of the hood ,
With an inspection, you can see the rubber guard on the hood seals off the windshield and the heat crawls to the two ends of that rubber seal then back to the highest point at the center of the hood..
The compartment is not big enough to keep the engine from it’s own heat!
The cause is a bad design of the engine vent system!
I cut away the top half of the rubber seal at center (2 foot wide x 1”) That way there is still enough left for water run off from windshield area .. Be careful not to cut away in front of air screened vents … My CXL is now a cool tool...
Bud Crawford Coopersburg PA 18036
#19 of 137 Re: CX-CXL overheating probs,, [buddo9]
Jul 19, 2010 (5:24 am)
Love your idea of customizing the base design and allowing it to breath (vent) better. Keeping things cooler is a great idea. However, not too sure if I would modify its factory rain gutters. Especially if one lives in "April Showers" or colder snow climate region - like my region.
Instead of cutting away rain gutter material, I wonder if installeing a rear facing hood vent would be much better? Simply cut a hole in the rear / center of the hood and instead of mounting a forward facing hood vent, simply install its opening in a rear facing position. This way, air flow is sucked into the front hood and pushed out the top of the hood. Especially while driving down the road. And, its factory rain gutters remain untouched - "as factory design".
For a few pictures of low profile "bolt on" hood vents, surf:
http://www.globalgroupbuy.com/images/products/p/gb0918_p.jpg -> install with its opening facing the windshield.
http://www.iagperformance.com/images/products/exterior/hoods/seibon/HDS0203SBIMP- -STI/image_01_600.jpg -> install with opening rear facing.
Overall, I do love your idea of "keep it cool". Keeping the inner engine compartment cool (especially during hot summer months) is a great idea...
#21 of 137 Rendezvous overheating problem!!
Aug 15, 2010 (12:03 pm)
Well this problem started about two monthes ago. Never a dull moment with this vehicle, its one thing right after another so fast I can't fix them all. I just have to prioratize and fix what will keep this car moving! Safe or un-safe. Can't afford to fix the anti-lock wheel sensor. Just put a transmission in it four monthes ago. Well back to the problem at hand, the water pump was leaking a little water so we replaced the water pump and of coarse the belt. That stopped the leak and all seamed fine for six weeks. Then it started this over heating problem where the gauge would peg out on hot and I would get a flashing red light warning but when I would open the hood the engine didn't seem that hot! It felt more like normal, so I changed the sending unit thinking the temp guage was wrong (not). So next it was the T-stat (o-m-g what a p-i-t-a!). Someone said it had an air bubble in the cooling system so I spent hours trying to purge air out of the cooling system. So next it was the radiator cap, this thing just continues to over heat or so the gauge says. A couple of times it did over heat for sure, it actually felt hot. How can you tell if the head gasket is blown? It seems to run ok, other than a very slight miss at idle. Can anyone shed some light on this?
#22 of 137 Re: Rendezvous overheating problem!! [renman1]
Aug 16, 2010 (6:26 am)
To me, it sounds like an intake or head gasket leaking problem. Instead of letting rad fluid out, its "sucking air" in. Thus, creating air bubbles inside the RAD. Thus, one gets the impression their cooling system "always" has air locks trapped inside its system.
If wondering, I had a previous 2.0L 4 cyinder engine and its heat temp dial would go nuts as well. Its dial would move up and down - as if the grand stand folks were doing a "giant wave" - back and forth - at a major sports event. The night before, I drove the vehicle to my mechanic and the next morning, he calmly removed its "cool temp" RAD cap. He let the 2.0L engine idle for 15-20 minutes (with gas cap off), then we both looked down "inside" the rad's top opening hole. We could see bubbles floating up - up from its rad fluid. Talk about weird!!! He explained that its head gasket is gone and its sucking air into the engine, then pushing air into the rad's cooling system. Yet, no rad fluid under the vehicle when sitting. If wondering, 3 days later, my wife & I traded that vehicle in. Based on its older age, it wasn't worth a $2,000 head job (with its heads plained down for better contact) repair.
Hope this helps...
#23 of 137 Re: 2002 heating up [pertuset]
Dec 05, 2010 (11:42 am)
I have a 2003 rondezvous, and wife has stated that the over-heat lite comes on and off, and the heating goes cold. have also had air bag lite come on,and tire preassure lite as well. Took to dealer,and they could find no problem on the computer. took to a electrical place, and he said he could find no problem as well. This is a totally "come and go" problem. Can anyone offer any advice? If there is a wiring problem, shouldn't buick call a recall on these vehicles?. dealer wanted nearly 3k to replace wiring harnesses,what a rip-off.
#24 of 137 Re: 2002 heating up [wizardone]
Dec 06, 2010 (9:13 am)
If the heater blows warm then cold without any changes to controls I might suspect a low coolant situation, shouldn't be any electrical issue with that. The air bag light may be connection issue (perhaps under the seat) or that and the other light could be an issue with BCM.
#25 of 137 Coolant and Overheating Issue
Jan 05, 2011 (2:41 pm)
I have a 2005 Buick Rendezvous with the "34" engine. Recently it has developed a problem where the car says it is overheating, the dial runs all the way to "H" the red light comes on, chimes sound and all that. There are no leaks anywhere, and when I pop the hood the coolant reseviour is full and it bubbles. It is NOT bubbling because it is hot. If I pop the cap on the tank and wait about 2 - 3 minutes the coolant finds its way back into the system and off I go. It used to happen just once in a while, but now with the colder weather it happens quite frequently. I will be driving along with hot air in the car, then it suddenly turns cold, the guage will move to "H" Sometimes it will also just go back on its own and hot air will flow again in the car. I replaced the radiator cap so far and that has not helped much. Any thoughts anyone? I want to drive the car again, but am a bit concerned. Again, there are NO leaks in the system anywhere that I can see. Thanks!
#26 of 137 Re: Coolant and Overheating Issue [brucemcgr]
Jan 06, 2011 (9:25 am)
Kind of sounds like low coolant or air in system. If coolant was added at some point it 'could' have been low enough to allow air in and system would need to be bled again
#27 of 137 Check for "key off" short draining battery
Jan 06, 2011 (10:46 am)
I am looking at a 1999 Camry for my son and I suspect there is a short when ignition is in the off position (or key is removed). When we went to see the car the battery was nearly dead. Owner said it had been started about a week earlier. It was a new battery, owner said her mechanic said it was a faulty battery, he replaced in on warranty.
I am skeptical that that was the issue.
Can I check for a short with a multimeter (e.g., remove ground cable and check with an amp meter) or a code reader?