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Grunge in Intake Manifold - what's up with this? 200

posted by  Volvodad on  Thu Aug 22 05:19 CST 2002
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last visit: Thu Oct 23 16:18 CST 2014
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I’m pulling the head from my son’s 1981 B21F (265k mi.) because of a stripped spark plug hole (the thread insert stripped too). In removing the intake manifold, I noted a coating of black, greasy, deposits in the manifold runners and intake ports. Ditto the intake valves and injector tubes. There was also an oily film coating the air flow measuring valve down inside the big rubber boot that connects it to the manifold. Wondering if this is normal, or do I have a problem with something (such as the PCV system)?






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New Grunge in Intake Manifold - what's up with this? [200]
posted by  Volvodad subscriber  on Thu Aug 22 05:19 CST 2002 >


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