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Cute little trick to diagnose blocked CCV system...

424235 Views 91 Replies 39 Participants Last post by  crazy4trains
I just came across this interesting little trick for diagnosing blocked CCV in the Volvo forum:

With the oil cap sealed, engine on, stick a balloon over the dipstick tube and see if it inflates. If it inflates you need to service the PCV system.


I think he meant with the dipstick removed, so the balloon goes over the dipstick housing.

No balloon, no problem, get an old dish washing glove, cut a "finger" off and tie it with rubber band.
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Do the BavarianE39 CCV mod (in Xoutpost forum) and move on.
It has been a few yrs and 10K miles since I did the CCV Mod on my 2006 X5 3.0i: oil consumption went down to zero, unbelievable mod (it used to consume 1 qt of oil per 400 miles!!!).
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