Reply to "Howards Camshafts (Summit)"

horacecopeMember

George/guys

Pulled the engine today and the noisy tappet turned out to be a completely wiped out crank journal, see pictures below.

No 3 rod journal has been worn down completely, possibly in excess of 30 thou, not sure if this crank is saveable. However No 7 next to it is fine as is the other 6. Oil pressure was not great but never below 50 psi.

This was a brand new engine build, everything new, rods, bearings, ARP rod bolts,fresh oil, new HV oil pump, ARP main studs etc etc. Lifter bores sleeved, crank checked cleaned and passed by the engineering shop.

This engine has not done more than 20 miles since being built. Why would something as extreme as this happen in such a short time.

Main bearings are all good as is the other 7 rod bearings. Nothing left of No 3 rod bearing most of which is shrapnel in the sump.

Needing to take this back to the machine shop but any ideas ?? Got me absolutely stumped.

Cheers

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