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Frothy oil V70-XC70 1999

posted by  someone claiming to be Peter on  Thu Apr 4 17:58 CST 2019 [RELATED]

I just got the oil analysis results back from the lab. No coolant or water in the oil.

I ran a compression test, and all cylinders were uniform. (The tester read 120 PSI on all 5, which seems low, but it was a cheap Chinese tester. My sense is that, if you have 5 cylinders with readings within 1 pound of each other, there is not a problem.)

When I started the engine, and watched through the oil filler cap, I could see that the cams were getting plenty of non-frothy oil. I then drove the car 5 miles and checked the oil. There were no bubbles or froth.

I'm going to change the PCV and hoses, just for good measure, but whatever caused this problem, it seems to have gone away.






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