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Diagnosing Coolant in Oil

Old 01-14-2019, 01:01 PM
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Glad to hear it. First time I saw that under a cap I freaked until I figured out it was just condensation.
Old 01-15-2019, 07:25 AM
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Originally Posted by Racingguy04 View Post
Yes, I'm running a catch can, The M7 can plumbed according to M7's recommendations (and I'm aware of M7's reputation).

Out of curiosity, I checked the cap on my wife's 4runner today. It's a completely different car and engine (V6) but driven and stored in basically the same conditions. Her car also has a bit of sludge on the oil cap. So I think between that and the negative block tester test, it's most likely condensation. For now I think I'll just keep an eye on it, and reevaluate once the temps warm up (since I can't plan on the humidity dropping, this is Maryland after all....)
If you did it as per M7 instructions, you did it wrong. The can needs to be connected only to the PCV line and then back to the hard line under the IC. Change it, mine did the same thing yrs ago and I had it as per the Alta instructions (similar to M7). Changing it to the correct way solved the problem. Have had the can installed for 12-13 yrs now with no issues.
This is the correct way to install it.....
Old 01-16-2019, 10:08 AM
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Originally Posted by Tgriffithjr View Post

Here’s a great pic illustrating the different locations of possible head gasket leaks and the resulting effect on symptoms.
Great illustration! Im on the verge of pulling the head on a friends R53 due to coolant in the oil. No oil present in the cooling system. Illustration makes sense.
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