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Oldsmobile Forum: 2001 Intrigue temperature went to 3/4 marker
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01OldsIntrigueOwner 01OldsIntrigueOwner is offline
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2001 Intrigue temperature went to 3/4 marker

I was on my way to the rec center and on the temperature gauge, it went to the 3/4 marker with the heater on, and it would go down with the A/C on and hitting the accelerator. I changed the thermostat since the old one stopped working when the heater core hose got crimped accidentally, got the cooling system flushed, and the fans do work, somewhat (will check the fans again). I also installed a new coolant recovery tank since the old one had a leak and spewed over my pulley system. It's not supposed to warm up in 15 minutes (should be 30 minutes at best) and I can't use the floor jack on the front end due to the front suspension being lower than the rear, but, the ramps might suffice, if I can fit my derriere under the car. The funny thing is, my coolant is full. Help? The car has 118K+ miles on it and it's not the head gaskets that are bad (no oil in the coolant, no coolant in the oil, no white smoke, no misfiring or knocking).
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01OldsIntrigueOwner 01OldsIntrigueOwner is offline
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Removed Discord server invite.

Last edited by 01OldsIntrigueOwner; 2 Days Ago at 09:47 PM.
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Cutlass350 Cutlass350 is offline
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Quote:
Originally Posted by 01OldsIntrigueOwner View Post
Sign up on my Discord Server: https://discord.gg/--------- link invite never expires.
WTF is this??
Was your account hacked?
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Cutlass350 Cutlass350 is offline
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Quote:
Originally Posted by 01OldsIntrigueOwner View Post
I was on my way to the rec center and on the temperature gauge, it went to the 3/4 marker with the heater on, and it would go down with the A/C on and hitting the accelerator. I changed the thermostat since the old one stopped working when the heater core hose got crimped accidentally, got the cooling system flushed, and the fans do work, somewhat (will check the fans again). I also installed a new coolant recovery tank since the old one had a leak and spewed over my pulley system. It's not supposed to warm up in 15 minutes (should be 30 minutes at best) and I can't use the floor jack on the front end due to the front suspension being lower than the rear, but, the ramps might suffice, if I can fit my derriere under the car. The funny thing is, my coolant is full. Help? The car has 118K+ miles on it and it's not the head gaskets that are bad (no oil in the coolant, no coolant in the oil, no white smoke, no misfiring or knocking).
A few things:

1) My full-size big *ss 3ton Craftsman floor jack fits fine under my Intrigue.
The Intrigue isn't a lowered car.
Regardless, I typically use my ~35lb 1.5ton aluminum floor on my cars.



2)
Quote:
The car has 118K+ miles on it and it's not the head gaskets that are bad (no oil in the coolant, no coolant in the oil, no white smoke, no misfiring or knocking).
None of that means a lot when it comes to most head gasket failures on GM engines.
I drove my Intrigue for 9+ months with a bad head gasket. No loss of power, no loss of gas mileage, never a CEL. Even the IM (emissions tests) all passed.
But, it was like playing Russian Roulette. It was just a matter to time until the head gasket got much worse.

GM head gaskets fail for many reasons and in many way.
Parts fail by age, usage, etc.

It's not easy to diagnose a head gasket that is on the edge. It won't always "be bad".
The issue is that the heads are under-designed. Fwiw, that's very common with GM's aluminum heads.
The heads expand/shrink/move too much. That prevents the head gasket from keeping a seal. The more the heads move, the more the gasket struggles to stay attached to both the head and the block.

As the gasket starts to fail, it will go from having a good seal, to a bad seal, to having a good seal, to having a bad seal, etc.

Unless the mechanic can catch the gasket when it's not sealing properly, it can be hard for the mechanic to say that is the problem. And, that's a Very Expensive repair. So, it's not a repair that is done without good cause.

The only real way that indicates that the gasket is going, is an inconsistent temperature measurement (not the gauge - see #3).



3) Considering the age of the car, there's a good chance that it might be the gauge/dash-assembly.
Mine has been "wonky" at times for 7+ years. But, it's often only wonky for "short" period of time.
Usually, the temp gauge is the only gauge that is effected.
Still, seeing the temp gauge go up high and then stay there, isn't a good thing to see when you're driving.
I now keep a cheap (~$20) OBD-II reader in the car. Keep it in the trunk, put it in a baggie, it'll be fine.
Before, I used a bluetooth OBD-II dongle and the Torque Pro Android app. But, they *******ed up the app. It no longer works with the dongle I keep in the car and the car. I have an old version on an old phone, and that old version still works fine.

Plus, it's more of a hassle to use the dongle and then the app, then to use a cheap $20 OBD-II reader that shows live data and it very simple and easy to use. Plus, I can use it with gloves on.


Summary:
You need an OBD-II reader to verify if it's the gauge or the sensor/measurement.

I forget where the temperature sender is. But, if you replace it, it must be one bought directly from a GM dealer. Otherwise, there's a non-small chance that you're buying a counterfeit.
A counterfeit sensor does what ever. So, who knows if you're getting correct data, if the sensor is too slow, if the sensor is too noisy etc.
Also, temp sensors rarely go on 3.5s.


Good luck!
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01OldsIntrigueOwner 01OldsIntrigueOwner is offline
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Found the temperature sensor location according to AutoZone's site: https://www.autozone.com/repairguide...96b43f81b3dade in the rear by the right cylinder.
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01OldsIntrigueOwner 01OldsIntrigueOwner is offline
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Quote:
Originally Posted by Cutlass350 View Post
WTF is this??
Was your account hacked?
My account wasn't hacked. I made a Discord server myself, that's all.

I looked at the recovery tank and it looks like there's an air trap somewhere. It's not leaking coolant anywhere as the tank is still at the full hot marker after driving it for 30 minutes, except it stays at the full hot marker after being parked to cool down. I don't hear any knocking, except for the exhaust noise (split where the resonator and catalytic converter connects, which I'll be fixing on Friday afternoon) and the motor still sounds pretty good. I might take my car into the shop to get it looked at to make sure the head gaskets are still good or get them replaced (money's kind of tight right now).

Last edited by 01OldsIntrigueOwner; 2 Days Ago at 09:19 PM.
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