if my antifreeeze/coolant isnt low, then why would - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-29-2005, 05:39 PM   #1
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Default if my antifreeeze/coolant isnt low, then why would

on to the next problem(*)

My coolant level isnt low, I have verified this both at the resivior and in the radiator itself- however I almost always have an indicator on my dash that states otherwise! Its aggravating and embarrasing when I have passengers.
But thats not all, when I first start the car up after it has sat for several hours, I also get the low oil level indicator on the display! My oil pressure is fine, as is the oil level itself. After less than 5 minutes it goes out, leaving only my old frend Mr Low Coolant Level.

I was afraid that my cooling system was all mudded up and possibly confusing the sensor, but when I changed the tstat everything looked remarkably clean. Could it be a pair of faulty sensors? Maybe a bad harness ground somewhere? I havent gotten into my wiring diagrams yet, I though I would ask the Bonneville experts first.
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Old 08-29-2005, 05:44 PM   #2
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Sometimes debris and sludge builds up on the low coolant sensor in the back side of the radiator. I suggest trying to change it. Sludge may also be the problem in your oil level sensor, but the only way to know is to drop the pan. Re-use the OEM gasket with new sealant.
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Old 08-29-2005, 05:57 PM   #3
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Although I appreciate the possibility, I doubt sludge is the problem, this car has been very well taken care of most if not all of its life.

Then again, the labor isnt really a problem for me and the coolant level sensor/oil level sensor/oil pan gasket are only $69/$44/$39 from my local parts house, respectively . ($63.24/$81.25/$48.48 from my dealer)

If it bothers me enough, and no other suggestions arise, I may give replacing those parts a shot in a few months. I was hoping to replace all my vacuum lines, heater hoses, etc and do a complete tune up first.
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Old 08-29-2005, 06:00 PM   #4
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Regardless of the care you give the car, sludge in both systems is only a matter of time. The oil level sensor actually enters the pan THROUGH the gasket, and is pinched between the pan and block. It'* under a great deal of stress there.

The coolant sensor is a common occurence with age, regardless of coolant condition.
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Old 08-29-2005, 07:20 PM   #5
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I needed to replace the low coolent level sensor on my car when I got it. 91k on the car at the time. Thankfully I had a working one in my parts car, so in it went.

as for the oil one, try cleaning the connection first. If that doesn't worl, maybe look into replacing it.
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