Thread: Fixing a strange engine noise and then some

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If you are getting valve train noise with low oil pressure-----you may have lifters that has the oil groove band coming out of the lifter bore , too loose a fit of lifters to tappet bore, oil restrictors somewhere, wrong matching (mismatched) pushrod to rocker or tappet radius---

in other words---if you get noise when oil pressure is low---you got to fix cause of low oil pressure----the lifters will still see the exact same pressure no matter what the pushrod length is

Originally Posted by jerry clayton

If you are getting valve train noise with low oil pressure-----you may have lifters that has the oil groove band coming out of the lifter bore , too loose a fit of lifters to tappet bore, oil restrictors somewhere, wrong matching (mismatched) pushrod to rocker or tappet radius---

in other words---if you get noise when oil pressure is low---you got to fix cause of low oil pressure----the lifters will still see the exact same pressure no matter what the pushrod length is

Jerry - wouldn't I hear the clatter all of the time? Normal oil press at regular idle speed is 40+ psig - at 2000, about 60. The only time it dips is like I said above - and the oil pump is operating slower.

As far as push rods, they are Ford Racing L605's, identical in length to the OEMs at 6.272 (both them and the OEMs actual measure at 6.252 and according to other Ford forums, correct), matched to Ford roller lifters, in a crate roller Ford engine running a Ford E303 camshaft which has not a heluva lot more lift the the stocker.

With this all said, three pages worth, mine appears to be louder then most, but others have had some level of this problem too.