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Oil Cooler

Is there a way to test an oil cooler for leaks on the bench? If I fill it and let it set do you think it would leak if it's cracked? or would there not be enough head pressure.

Thanks
DK
Old 07-18-2010, 07:17 AM
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No unless the crack is huge.

Air compressor, and stick it in bucket of water. bubbles = bad
Old 07-19-2010, 04:45 AM
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Good idea.
Thanks Joe
DK
Old 07-19-2010, 05:30 AM
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You can also pressure-test it with liquid, if you can pressurize the liquid.

--DD
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Old 07-19-2010, 06:21 PM
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Ok, I've pressure tested oil cooler, It's fine. I have put three sets of seals in trying to get it to stop leaking.
First set
I tried to install them with the engine in the car as per the pelican tech article. It was a long and tedious process but went just like they said. Unfortunately they still leaked.
Second set
Went pretty much like the first. Time to drop the engine.
Third set
After pressure testing the cooler I installed the seals with the engine out of the car. I used perma tex sealer and didn't tighten the nuts to tight.
You might have seen my post about turning the engine over on the bench.
Well I saw it leaking from the seal (upper for sure) and with my luck probably the lower to. I tightened the nuts down a little more and still leaked. Tightened the nuts down a little more and I could see the leak getting worse.
So I took it off and took pics and here we are.
All three sets of seals were PP seals. Could they be to hard?
Should I goup the crap out of them before there installed?
Could they be the wrong seals?
I'm really stuck here, I just want it to stop leaking.
Do you see anything wrong or something I'm missing in the pics?
Thanks
DK


Old 04-09-2011, 11:47 AM
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Those thick washers on the studs were on the outside of the cooler, under the nuts...correct?
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Old 04-09-2011, 03:23 PM
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No Mike they were not
Old 04-09-2011, 04:01 PM
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I'll defer to those more familiar but I'm pretty sure I put them under the nuts when I assembled my engine and it has 1500 miles and no leaks. I did not use any sealant.
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Old 04-09-2011, 05:14 PM
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Yes I'll wait and see if someone else wants to chime in, but it makes perfect sense. Givin the history of of my 3 attempts that has to be it.
Thanks for your reply much appreciated.
DK
Old 04-09-2011, 05:51 PM
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The washers go under the nuts. If you place them between the cooler and case, you will never get a seal ... won't compress the seals.
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Old 04-10-2011, 06:47 AM
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Thanks all. The washers were the culprit. I can't believe I missed that with the amount of time I spent staring at it.
Thanks again for taking the time to reply.
Much Appreciated
DK
Old 04-10-2011, 08:42 AM
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