Scored Main Cap Bearing

Scored Main Cap Bearing - Ouch

pt70 said
Post 151 is for a modified oiling system, but basically correct.

The thrust main surfaces on the crankshaft look good. You saved it. Check the endplay when you get the new bearings.

I'd check the outer section of the filter for evil stuff. If clean, then run some long Q-tips thru the crank oiling holes. Tape off and cover the rear main area and seal up the rest of the oil pan area. Then grind the flywheel bolts for clearance. Note that the rods and mains must be assembled with the old bearings [just snug is ok] so you can turn the crank to shorten the bolts.

Clean and install new bearings. Assemble and run engine at low RPM for a while. If quiet, road test!

PT70 I have done all these except the filter yet and the bolt grinding. The oil holes are all clean and all the rod bearings are in now, but not torqued (what a pain). Finishing up the mains and will post pics of all journals before I torque anything. Im keeping my fingers crossed that it has been saved. When they ground the crank it left sharp edges around the chamfers so every oil hole got polished with 400/600/1000 and checked for cleanliness with my long detail q swabs.