leaking waterpump causes oil p.s.i goes over 120 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-20-2007, 01:15 AM   #1
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Default leaking waterpump causes oil p.*.i goes over 120

dang,my cars leaking alot of coolant from the waterpump and i have a quick question,my oil p.*.i is at or over 120,is that bad.
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Old 03-20-2007, 01:26 AM   #2
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Oil pressure MAY be directly related to the oil sending unit, Located above the oil filter, its pointed toward the rear of the car, has a lilttle weatherpack harness connected to it.
Fairly easy piece to change if it is indeed the problem.
You can have it tested at a shop or by yourself using a mechanical gage that fits into the spot of the current sending unit, for testing purposes only. Many others just opt to buy this part from a reputable jobber, and replace it, fingers crossed that it works, It worked for me..sucess rate is fairly good with this, not the most expensive part either, I think mine was 30 dollars. If this is the case, the needle should read a lower, much more proper PSI..30-40 at idle is common.

Waterpump:
The shaft seal in the waterpump itself has failed, the coolant is now leaking into the housing and leaking through the "weep hole" Common Failure, however needs to be adressed promptly as ofcourse, low coolant is not a good thing.
This should be helpful for you http://www.bonnevilleclub.com/forum/...e=article&k=67
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Old 03-20-2007, 01:27 AM   #3
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HIGH oil pressure from leaking coolant and overheating? Backwards, bud. Backwards. Your oil pressure would be low. You have two different unrelated problems.
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Old 03-20-2007, 08:05 AM   #4
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Matt has this one nailed.

The oil pressure sender is probably bad. 120 is the pegged reading, usually means the sender has failed. I would replace the sender while you are replacing the water pump.
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Old 03-21-2007, 12:33 AM   #5
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thanks matt,i will do what you said and willwren,thanks as well,but i guess the 2 problems came bye the wrong time cause i wanted to go to my hometown this weekend but now i cant,but thanks guys,ill try the diagnostics and ill keep yoyu guys updated.
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Old 03-21-2007, 12:52 AM   #6
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I have one of the whacky op gauges. It pegged once to 120 psi. I wanted to stop the car and leap out before it exploded. It was the sender. Replaced it and it went back to normal whacky.
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