BLACK'98DSM
5+ Year Contributor
- 4,450
- 1,889
- Feb 9, 2019
-
Alabama
I think I got a rod knocking already. I'm not sure yet but there's some sort of knock near the oil pan area. It's really quiet once warmed up but on a cold start it's scary.
Engine literally only has 4.5k-5k miles on it. I used Clevite bearings, standard size since the crank journals were still within spec. Plenty of oil pressure, never seen it fall below 40psi even when hot. 10w-40. I do beat on it pretty hard sometimes. But I still expected it to last a little longer.
Does anybody have any input on how long their 420a rod bearings last on higher performance builds? Are there any better materials than Clevite?
Next rebuild I'll have the crank machined down to the next size bearing. Just wondering if 5k miles of beating is all it takes to destroy the bearings. If that's the case it looks like I need to stock up on a garage full of 420a engines
Engine literally only has 4.5k-5k miles on it. I used Clevite bearings, standard size since the crank journals were still within spec. Plenty of oil pressure, never seen it fall below 40psi even when hot. 10w-40. I do beat on it pretty hard sometimes. But I still expected it to last a little longer.
Does anybody have any input on how long their 420a rod bearings last on higher performance builds? Are there any better materials than Clevite?
Next rebuild I'll have the crank machined down to the next size bearing. Just wondering if 5k miles of beating is all it takes to destroy the bearings. If that's the case it looks like I need to stock up on a garage full of 420a engines