Thread: double roller timing chain cover

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its a mark 4 I tried the original cover and it was hitting on the chain near the cam sprocket.

Originally Posted by workinINtheDIRT

its a mark 4 I tried the original cover and it was hitting on the chain near the cam sprocket.

better re check what you have going on..... cams to far out did you check gear alignment . who.s chain set . you using a thust washer ? is the cam gear cut for it . over the years i put about a 100 roller chains in mark 4s blocks . only time i seen them hit is with a china cover. Gm did put a cheap rolled pin roller in the 366/427 or every one i got in to was replaced .the front timming cove cast in to the block and tin timming cover is the same as the 9.800 deck from 65 till about lat 80s. small thing like 1965 has no dowel pins and some covers have timming tabs on for dif size dampers so they fit