2nd Generation Specific 1986-1992 Discussion

Oil Temp Still Pushing 210

Old 03-09-2005, 07:28 PM
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S5, streetport, aftermarket oil lines, etc.



I think the oil cooler may be acting up, does this sound right, or could it be something else?
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Old 03-09-2005, 07:42 PM
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wheres the temp sender?
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Old 03-09-2005, 07:43 PM
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There is a thermo valve in the intercooler that opens when it gets to a certain temp. If the oil temp is below X degrees (i can't remember off the top of my head) then it bypasses the oil cooler (ie warm up and cold weather). If this thermovalve fails your oil cooler is never used and you may be getting high oil temps because of that. The fsm shows a way of checking this valve. I don't ahve the FSM and it's in the cold garage...
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Old 03-09-2005, 07:48 PM
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Originally Posted by j9fd3s' date='Mar 9 2005, 05:42 PM
wheres the temp sender?



right underneath the filter, in the adapter plate





Originally Posted by Cheers!' date='Mar 9 2005, 05:43 PM
There is a thermo valve in the intercooler that opens when it gets to a certain temp. If the oil temp is below X degrees (i can't remember off the top of my head) then it bypasses the oil cooler (ie warm up and cold weather). If this thermovalve fails your oil cooler is never used and you may be getting high oil temps because of that. The fsm shows a way of checking this valve. I don't ahve the FSM and it's in the cold garage...



it involves yanking the valve out and some boiling water, i think, i'll have to look again, I loaned the manual to the upholstery shop, after they did my top a slew of vert rx-7's showed up for new tops too.
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Old 03-09-2005, 08:18 PM
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yeah i would look at or replace that valve too
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Old 03-09-2005, 09:31 PM
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i mean oilcooler... i'm on crack sorry
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Old 03-09-2005, 10:38 PM
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The thermo valve on the oil cooler opens at 140 degrees.



You should take your oil cooler off and have it professionally cleaned(if it hasnt been recently). That would be my first guess.
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Old 03-19-2005, 07:28 PM
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I had the oil cooler cleaned, the valve is shot, it doesn't open at any temp. I was thinking of eliminating the valve completly and just putting a plug in the cooler, hence oil will constatly run through the cooler. Will this cause more harm, or none at all?
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Old 03-19-2005, 07:57 PM
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[quote name='89 Rag' date='Mar 19 2005, 05:28 PM']I had the oil cooler cleaned, the valve is shot, it doesn't open at any temp. I was thinking of eliminating the valve completly and just putting a plug in the cooler, hence oil will constatly run through the cooler. Will this cause more harm, or none at all?

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The only real downside is it will take the car longer to get to optimal oil temps. Hearing your experience makes me want to check my oil temps. Are you running the oil filter block with a port for a oil temp guage?
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Old 03-19-2005, 08:11 PM
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[quote name='cymfc3s' date='Mar 19 2005, 05:56 PM']The only real downside is it will take the car longer to get to optimal oil temps. Hearing your experience makes me want to check my oil temps. Are you running the oil filter block with a port for a oil temp guage?

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Yes, ports for both oil temp and oil pressure, the relief valve is shimmed too so under load it is pushing through at a pretty good clip. Now that I think about it more, a plug alone will not make the oil flow through the cooler constantly, unless it was long enough to close the opening where the check valve used to rest in the open position, and it would have to be sealed in some manner...
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