383 premature rod bearing failure. Could too much timing been a problem???

Question

I have a fairly new Chev 383 with about 30K mile on here. I took the engine apart because of an engine knock that developed. After tearing down the engine I notice I have some very badly worn (all eight) rod bearing. I don't know if these are the BI_METAL or TRI-Metal rod bearing. They have copper showing on top and no were else. I believe maybe a weak oil pressure could have done this type of damage but I install a new HD oil pump. I have pictures of the rod bearing if you like to me to send you for more information. Just looking for the cause of such a Any thoughts would be helpful

Byron T Tucson AZ

1989 K1500 TBI-383 built for towing.

Shades · Accepted Answer

What rod length are you using? What bearing make?

none2u · Answer

What was the oil pressure.

bataradena · Answer

Over 60 PSI.....Byron

Big Al · Answer

Common problem with engines that have detonation problems. Is yourcompression ratio higher than 10 to 1?Al

bataradena · Answer

I'm running about 9.6:1.  If this is true about detonation what can aperson do other then run the more expensive fuel.  I'm going to installthe better rod bearing this go around. I hope this helps..Thanks ByronBig Al wrote:

bataradena · Answer

The standard 5.7 rods. About the bearing, I don't really know about thetype of rod bearing installed. I got the engine as a kit.Byron T

Shades · Answer

So the kit came with the 350 rods and not the 400 rods?Federal Mogul and Clevite77 bearings are all I recommend and would ever run.

383 premature rod bearing failure. Could too much timing been a problem???

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