knocking in valvetrain on 400sbc??!!!
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From: Abilene/Lubbock, TX
knocking in valvetrain on 400sbc??!!!
I just bought an 89 IROC with a 400sbc.
It has high lift cam, roller rockers, angle plug heads and a TPIS mini ram II intake system. The problem is the stock valve covers are too small, and this creates a knock.(the rockers hit the valve covers)
That is not the only noise, a couple people have listened to it, one said maybe a busted valve or a busted valve spring. Someone else said possibly a rod bearing. It doesn't miss and it runs ok except for the knock. Any advice or other info on 400's will be welcomed.
It has high lift cam, roller rockers, angle plug heads and a TPIS mini ram II intake system. The problem is the stock valve covers are too small, and this creates a knock.(the rockers hit the valve covers)
That is not the only noise, a couple people have listened to it, one said maybe a busted valve or a busted valve spring. Someone else said possibly a rod bearing. It doesn't miss and it runs ok except for the knock. Any advice or other info on 400's will be welcomed.
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