GTO Overheating--Steps Taken - Pontiac GTO Forum
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post #1 of 4 (permalink) Old 01-19-2011, 08:19 AM Thread Starter
 
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GTO Overheating--Steps Taken

In mid November my 2005 GTO (6spd w/ 72k miles) began getting large temperature spikes, pegging the gauge and giving the Engine Temp warning chimes.

I had the thermostat replaced at a local Firestone (normally I'd do this type of things myself but I'm not really in a position to be able to do work on my own car right now). The car behaved perfectly for about 35 days--no temperature spikes. Then they suddenly started again worse than ever. I would go 2-3 miles and get a spike. I immediately took it back to Firestone and they replaced the thermostat again under warranty. unfortunately no-dice, the problem persisted.

Next I replaced the temperature sensor. This I did myself and the car again behaved for about 3 weeks. This morning the temperature again began spiking. I'm at my wits end with this thing--anyone have advice or had a similar problem?
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post #2 of 4 (permalink) Old 01-19-2011, 02:12 PM
 
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Radiator cap since your an LS2 would be a possibility as well as a cheap replacement.

I'm assuming you don't have any leaks and your coolent level is where it should be.
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post #3 of 4 (permalink) Old 01-21-2011, 01:59 PM
 
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Originally Posted by davidbutzin View Post
In mid November my 2005 GTO (6spd w/ 72k miles) began getting large temperature spikes, pegging the gauge and giving the Engine Temp warning chimes.

I had the thermostat replaced at a local Firestone. I would go 2-3 miles and get a spike. I immediately took it back to Firestone and they replaced the thermostat again under warranty. unfortunately no-dice, the problem persisted.

Next I replaced the temperature sensor. This I did myself and the car again behaved for about 3 weeks. This morning the temperature again began spiking. I'm at my wits end with this thing--anyone have advice or had a similar problem?

Does it do this when u first start up and or while parked will it shut off when u go down the rd, i just posted on another link my problems with mine as well.

06 PBM GTO M6, Diablo Tune, Kooks L/T Catless, MGW-P, T/B, Driveshaft Shop Axles, CAI
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post #4 of 4 (permalink) Old 01-21-2011, 03:29 PM
 
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Quote:
Originally Posted by davidbutzin View Post
In mid November my 2005 GTO (6spd w/ 72k miles) began getting large temperature spikes, pegging the gauge and giving the Engine Temp warning chimes.

I had the thermostat replaced at a local Firestone (normally I'd do this type of things myself but I'm not really in a position to be able to do work on my own car right now). The car behaved perfectly for about 35 days--no temperature spikes. Then they suddenly started again worse than ever. I would go 2-3 miles and get a spike. I immediately took it back to Firestone and they replaced the thermostat again under warranty. unfortunately no-dice, the problem persisted.

Next I replaced the temperature sensor. This I did myself and the car again behaved for about 3 weeks. This morning the temperature again began spiking. I'm at my wits end with this thing--anyone have advice or had a similar problem?
When you checked your coolant, was it boiling? I am having phantom temp spikes also. It happened to be a few days ago and then went away out of nowhere. The only thing is, when I checked under my hood, my coolant was boiling.

BTW, I have a thread about my issue already opened, if anyone has a suggestion to my issue, please reply to it.


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Houston, Texas... Always looking for another GTO fan in my area. PM me if you live in Houston.
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