Re: purge valve tapping noise? - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: purge valve tapping noise?
Posted by Dean [Email] (more from Dean) on Mon, 28 Feb 2005 09:03:59
In Reply to: purge valve tapping noise?, mikel, Mon, 28 Feb 2005 08:20:22
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If start and idle are ok, the valve a bad hose are not allowing excessive air flow. Some have cleaned the purge valve with WD40.
You can feel the valve to see if its making the noise.
You could have sticking lifters. What oil have you been using? I had some of that with Castrol Faketec. Cleared it up with some solvent type oil additives and flushes. Swithed to Mobil 1 and it never happned again. You can rev the engine slightly and tell if the noise varies with engine speed.
Lifters can often be heard in the cabin with hood shut, but not heard standing near engine with the hood up.
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