Hi guys. Just recently started getting a skim of oil in my surge tank. Coolant hoses are now getting soft and sweating an oily residue. Everything seems to point towards the oil cooler. My question is: How do you verify it is in fact the oil cooler? I was thinking of removing oil filter, then pressurizing the coolant system with air at the surge tank, looking for coolant loss from the oil filter head. Cross contamination could be coming from any number of areas: air compressor, turbo, water pump, head gasket etc. Any other suggestions towards testing would be appreciated. Would really suck to replace, then find out it's a head gasket.
ISX CM871 Oil In Coolant
Discussion in 'International Forum' started by CraigInReston, Apr 17, 2022.
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You normally see the sweating and soft hoses after fuel has been in it a while, not so much with oil.
Either way, if it's oil, as you stated, the oil cooler is most likely. Don't rely on the cross contamination theory.
If it's fuel, it'll be injector cups.CraigInReston Thanks this. -
Oil cooler.
God prefers Diesels and CraigInReston Thank this. -
You would have to remove the oil cooler to pressure test it.
CraigInReston, Smellfunny, God prefers Diesels and 1 other person Thank this. -
We made up some plates to test them with. Took some plates and drilled a hole in one of them and then welded a tire valve stem in the hole. Basically the same design for our charge air cooler tester. But with the charge hoses necessary to connect to cooler and a pressure gauge : )
CraigInReston and Heavyd Thank this. -
Heavyd Thanks this.
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I have seen the cooler be good and the gaskets leak plenty of times. Been a while since I did one but there is something about sealer or something that goes on the bolts that hold the cooler on to the plate if I remember correctly.
CraigInReston and God prefers Diesels Thank this. -
Yes, the gasket is the likely failure point. If it were me, I would replace the element regardless due to age and for the simple reason you have it apart now away.
spsauerland, CraigInReston, Smellfunny and 1 other person Thank this. -
CraigInReston, Heavyd and Smellfunny Thank this. -
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