Pieces of steel in cylinder??

my68barracuda said

good points on brushing out the oil galleries, and maybe it has already been said, but I would be highly suspect of the
piston and rod from the cylinder where the seat came out. The piston could be cracked in the pin bore and the rod bent,
maybe not, but if you plan to re use them, have checked plenty close.

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Righty Tighty said

I threw the old pistons out, had the shop press in new pistons. Just picked them up from the shop today, I'll have them take a close look at the connecting rods like you said.

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You should have them check the diameter of the crank journal bore to see if it's still round... That will also tell if the cap has sprung and spread on the ones that the metal parts were hitting the pistons...

Be careful not to keep torquing the rod bolts... After 5 torques, I would recommend replacing the rod bolts with new ones...

If you have the rod bolts replaced, then have the machine shop recondition the crank bores with them... The new bolts may locate the rod cap differently and cause a mis match in the bores... If they recondition the rods after installing the new bolts, then the crank bore will be true and the bolts will be fresh... Keep in mind that it will take a minimum of two clamp cycles to plastic gauge and then install the piston and rod assembly to the engine... You will have 3 clamp cycles on them right off the bat - one for re-machining the rod and cap, one for plastic gauging, then one for final assembly...

If you torque the rod bolts too many times, they can get over stretched and weaken them where they will eventually fatigue and break... When the rod bolt breaks, the rod usually ends up putting a large hole in the block and then it's garbage...

If the engine was already rebuilt before you got it and they plastic gauged the bearings, the bolts in the rods that you have will already have a minimum of 5 clamp cycles on them and should be replaced...