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Re: GM 3400 spark plug deposit
Posted to Technical Discussion Forum on 7/31/2005 3 Replies

Hi Wayne,

Martin's suggestion is a good one. Block off the PCV system and check for crankcase vacuum. Place a hundred dollar bill over the grommet to verify.

Very nice photos! Oh, BTW, my father really likes the name of your shop. He says it has character.... Login to read more.

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