Thread: 454 lack of oil on valve train - Suggestions

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Originally Posted by Scooting

Hi, not ignoring anyone's comments. I am waiting on catching the owner to tell him about them. It might be the weekend before we get together. I am willing to plascit-gauge the mains and rods if he wants to pull it back apart. I really don't expect to find a large difference there. I found out the lifter bores were honed. I don't think a measurement was made of them. I do recall the lifter did not seem loose in the block - can I tell .002 give? Good question.
Pat, we ran wires from the rear main up to the cam and did not find any sign of blockage. After I know more, I may give you a call, thanks.
Jerry, I never checked the front plugs other than when he had them out. I am guessing the .025 holes are for oiling the timing chain area. Is that correct?
I hope to stay with this problem until a solution is found and report back. I just hate it when something gets fixed and the op never states what was the cure.

the main lifter feed holes there two ...one feeds each lifter bank and is under the number 5 cam bearing so less you take out the number 5 cam bearing your not going to know nothing about if someone use oil restrictors in the 360 grooved housing bore is part that make s the lifter get oil a wire to mains to cam bearing just checks that the number 5 cam bearing gets oil not the lifters... the small hole in 1/4 npt end plugs are to keep air out of oil this helps keep the lifters from making noise not to feed the timming chain but engine builder have used it for that when on a timing set that has thrust bearing on timing gear . GM it was to keep air out