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Registered
Join Date: Sep 2003
Location: Vermont
Posts: 1,199
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Engine Mounted Oil Cooler
I recently replaced the engine oil cooler seals but did not have the cooler pressure checked. I still have an oil leak when running that drips off the bottom of the cooler.
All other common sources were taken care of - sender unit, breather gasket, t-stat o-ring. How common is it for the cooler itself to spring a leak? It leaks a drop every fifteen to twenty seconds or so when the engine is running, two or three drops once the motor is shut off, then nothing. |
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Registered
Join Date: Dec 2003
Location: Arapahoe County, Colorado, USA
Posts: 9,032
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deanp,
While a cooler leak is not common, it isn’t unheard of. It is easy to remove and have tested. That is your next step. Best, Grady
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Registered
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It might be leaking from the case behind the cooler from the notorious slot and sleeve area. Clean with carb cleaner and JB Weld the slots. Do a seach on this BBS. It was the only leak on my rebuild. You can see its sister slot on the case between the oil cooler and Cyl #6
I'm dry now. 78SC
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78SC coupe, Silver Metallic |
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Registered
Join Date: Sep 2002
Location: Leesburg, VA
Posts: 1,278
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Dean,
Did you resolve this leak?? I'm dealing with the exact issue. But, I had the cooler pressure checked and was told it was fine. What did you end up doing? Thanks
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Greg |
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Registered
Join Date: Sep 2003
Location: Vermont
Posts: 1,199
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I haven't addressed it yet. I am waiting for some parts to be able to install the external thermostat, elephant lines and a trombone cooler. I plan to take a look at it then. Will let you know what I find.
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Irrationally exuberant
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It isn't uncommon for oil coolers to fail when tested. Mine engine one did and a friend of mine got quite a few used coolers that failed also.
-Chris
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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Registered
Join Date: Apr 2004
Location: SF Bay Area
Posts: 54
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I just came in from the garage after completing my oil cooler seal change! I don't think the "cooler" was doing very much cooling, as it was basically a big lump of grease. All nice and clean now. Took about 4-5 hours of greasy work. I'm chasing an annoying oil leak also, having replaced all the oil return tubes, pressure switch, and oil thermostat oring. Couldn't do the breather gasket as I couldn't access without removing so much stuff as to make it not worthwhile. Hopefully this was it..... .
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1987 Carrera Targa |
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Registered
Join Date: Sep 2002
Location: Leesburg, VA
Posts: 1,278
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My oil cooler has a LEAK ...
Rigged it to the air compressor, charged in to 30psi and dunked
it in a sink full of water. Bubbles galore, coming from the core on the same side of the cooler the oil collected. A mystery solved.
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Greg |
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Registered
Join Date: Apr 2004
Location: SF Bay Area
Posts: 54
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Mine's now leak free. It was the oil cooler seals.
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1987 Carrera Targa |
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