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Old 03-17-2003, 01:06 PM   #1
Alfletch
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Angry Oil Cooler Leak Will Cause Coolant in Oil?

I serviced my 85/2 944 oil cooler and found that the oil cooler had a leak. I also found coolant in the oil. I had not driven the car after servicing the oil cooler, I just started the car and found I was loosing coolant and when I drained the oil, coolant came out also.
It's been said that a blown head gasket causes oil/water mixture. Will a leaky oil cooler also cause oil/water mixture.
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Old 03-17-2003, 01:23 PM   #2
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Sounds like something was not put back together properly. Usually the oil will get into the coolant since it has more pressure. What do you mean by "the oil cooler had a leak" ? From the seal around the edge ? Do not run the car anymore till this is solved, the coolant can destroy the rod bearings. Possible you got the wrong o-ring for the relief valve ? THere are 3 types of relif valves; Early style uses a piston and spring with no o-ring, 85.5 thru 86 use a 1 piece relief valve 944 107 035 11 and it uses o-ring 999 707 145 40 . Starting in '87 the relief valve is smaller ( 944 107 035 02 ) and uses o-ring 999 707 144 40. Hope this helps !
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Old 03-17-2003, 04:34 PM   #3
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What I ment by "The oil cooler had a leak" was that the oil cooler element had a couple of holes which showed when it was subjected to air pressure and immersed in water. I also suspected the one piece oil pressure relief valve which I took from an engine which was sitting around was not working. Would the oil pressure relief valve cause coolant to mix with oil rather than oil in coolant? Apart from a blown head gasket causing coolant to go to the oil is anyone confident what other problems will cause the same effect - coolant to oil?
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Old 03-17-2003, 04:40 PM   #4
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Additionally, I plan to re-use the three-piece oil pressure relief valve that was in the cooler initially together with the older type oil cooler housing. Afterall this was the design the car had from the factory!
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Old 09-09-2009, 05:32 PM   #5
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This is REALLY old, but I was wondering how this turned out and what the answers turned out to be?
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Old 09-09-2009, 08:58 PM   #6
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I got a good used Oil Cooler, replaced the Relief Valve "O" ring, and used the special to center the cooler and that solved the problem.
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Old 09-09-2009, 09:26 PM   #7
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Thanks for the reply. I'm trying to trouble shoot a leak of both coolant and oil, in what looks to be the same spot. I won't be sure until I get the lower body work off.
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Old 01-23-2010, 09:18 PM   #8
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Im taking my engine apart to, cuz i got brown oil (oil with coolant?) and white (milkshake) on the dipstick and in the intake boot. So I figure im gonna do a seal service and replace any dmg parts with new ones and replace all other stuff that is worth replacing. Also have some oil "Swething" around the middle of the engine and under the oil pan. I was thinking of getting this parts, what more do I need ?
Any parts I "HAVE" to replace when im down ther ?

To Order :
944 NA Throttle Body Reseal Kit
Wiper Delete Plug (for the rear window)
Engine Tool Kit (MAXI) from http://www.arnnworx.com/
New tool kit with all the tools I need (I am always borowing someones :P)
Timing Cover Bolt Kit
lower engine gasket set
Wide Fire Head Gasket 2.5
intake gasket
944 Cam Tower Gasket Kit
MSD BLASTER 2 ANTI-VIBRATION COIL
dip stick (mine is a stupid diy stick I think, old owner of the car was not taking care of it)
Connector On Harness For Fuel Injector
Complete injector kit - http://944online.com/cgi-bin/ASI_Sto...key_1178636303
High Performance Ignition Wires
Deluxe distributor cap & rotor kit
Coolant expansion tank for 924S, 944, 944S and 944S2.
Lindsey Racing aluminum water block off plate
Water Pump Porsche 924S / 944S / 944 1982-88 (Is this what I need to update my water pump ?) http://www.design911.co.uk/fu/prod37...88--non-Turbo-
Water Temp Sender (Do i need to replace this ?)
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Old 01-23-2010, 09:18 PM
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