So about my overheating car
Joined: Jul 2003
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From: michigan
I would also have your radiator cap tested. If it is failing, it will allow pressure to escape under high heat ie with the A/C on and allow the coolant to become de-pressurized and overheat.
Thread Starter
Senior Member
Joined: Jun 2004
Posts: 30,331
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From: Montréal, Canada
hmm... that's a good point. a rad cap can't be all that expensive and chaging it certianly cant hurt.
I still like honda's. :-/
Joined: Mar 2004
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From: Gilbert, AZ
Are you absolutely sure that both fans are running when the A/C is on?
On my wifes jeep liberty, it was recently overheating in the exact same manner yours is.
Every time I looked under the hood, I could see the fan working.
Well, turns out, this fan is a 2 stage fan. It comes on when the A/C is on, and should come on at a certain temperature. It wasn't coming on when at the certain temperature. So when the A/C was on, it would stay on. But every few minutes when the A/C compressor would kick off (all a/c's do this), the fan would kick off. This is supposed to give the engine time to cool off, but instead when the A/C would kick off, the car would get hotter.
Kind of hard to explain, but a new fan ($300 later), and the issue is gone.
Other than that, the thermostat is usually an easy and cheap fix. You can pull yours out and place it in to a pot of boiling water to test if it is opening correctly.
On my wifes jeep liberty, it was recently overheating in the exact same manner yours is.
Every time I looked under the hood, I could see the fan working.
Well, turns out, this fan is a 2 stage fan. It comes on when the A/C is on, and should come on at a certain temperature. It wasn't coming on when at the certain temperature. So when the A/C was on, it would stay on. But every few minutes when the A/C compressor would kick off (all a/c's do this), the fan would kick off. This is supposed to give the engine time to cool off, but instead when the A/C would kick off, the car would get hotter.
Kind of hard to explain, but a new fan ($300 later), and the issue is gone.
Other than that, the thermostat is usually an easy and cheap fix. You can pull yours out and place it in to a pot of boiling water to test if it is opening correctly.
Thread Starter
Senior Member
Joined: Jun 2004
Posts: 30,331
Likes: 0
From: Montréal, Canada
Are you absolutely sure that both fans are running when the A/C is on?
On my wifes jeep liberty, it was recently overheating in the exact same manner yours is.
Every time I looked under the hood, I could see the fan working.
Well, turns out, this fan is a 2 stage fan. It comes on when the A/C is on, and should come on at a certain temperature. It wasn't coming on when at the certain temperature. So when the A/C was on, it would stay on. But every few minutes when the A/C compressor would kick off (all a/c's do this), the fan would kick off. This is supposed to give the engine time to cool off, but instead when the A/C would kick off, the car would get hotter.
Kind of hard to explain, but a new fan ($300 later), and the issue is gone.
Other than that, the thermostat is usually an easy and cheap fix. You can pull yours out and place it in to a pot of boiling water to test if it is opening correctly.
On my wifes jeep liberty, it was recently overheating in the exact same manner yours is.
Every time I looked under the hood, I could see the fan working.
Well, turns out, this fan is a 2 stage fan. It comes on when the A/C is on, and should come on at a certain temperature. It wasn't coming on when at the certain temperature. So when the A/C was on, it would stay on. But every few minutes when the A/C compressor would kick off (all a/c's do this), the fan would kick off. This is supposed to give the engine time to cool off, but instead when the A/C would kick off, the car would get hotter.
Kind of hard to explain, but a new fan ($300 later), and the issue is gone.
Other than that, the thermostat is usually an easy and cheap fix. You can pull yours out and place it in to a pot of boiling water to test if it is opening correctly.
I guess the thermostat is my best bet at this point.
Joined: Oct 2000
Posts: 44,908
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From: Location Location
yeah thermostat is probably your best bet. shouldn't be too expensive and fairly easy to replace.... of course i've 0 experience working on a g35 :chuckles:
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