hi anyone,
this is a troublesome problem. i got a 92 Chevy Corsica V6. i took off two of the rod caps to inspect the bearings. they have a perfectly normal pattern of wear. no problem.
oil and replace the bearings and caps, slip the rod caps over the rod studs and start to tighten the cap nuts. i tighter the nuts to 20 #s and the crank won't turn. its hopelessly wedged. the Haynes manual says 39 #s.
everything is right and in good shape. scratch my head. loosen the cap nuts and it cranks normally by hand with a wrench. tighten the cap nuts at half the rated torque and the crank is frozen solid. didn't touch any of the other rods.
so what the hell? no i didn't do the plastigage. but why should i? the wear pattern is perfect. and it was turning just fine before i started. i used the torque wrench on some of the other nuts and it seemed that they weren't torque as much as they should be, but then how much torque do they need?
thanks anyone, Louie