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Exactly what is a sticky valve? S90-V90

posted by  lpsage on  Sun Jan 30 18:49 CST 2005
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last visit: Sat May 24 04:57 CST 2014
[RELATED]

EVery so often, I hear a noticable ticking at idle on my 98 960 w/93K. In going over the service records, I see the PO had the Volvo dealer treat this problem before. The Volvo dealer used Marvel Mystery Oil to treat it. It goes away quickly enough without any additives but you can sure hear it when it's there.
Sounds like....well, it sounds like a valve tap!

What is the science behind a sticking valve? What is the tried and true remedy?
I use dino with a 3-5K change interval, Mann filter.
--
93 945 109K , 94 940 106K ,98 V90 89K






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New Exactly what is a sticky valve? [S90-V90]
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