Okay so this is my second attempt at this so I lack some experience. So here is this 5.0L block, the crank was checked and polished and everything is within spec. I install some new main bearings after everything is cleaned up.
I start with the middle main caps, then move outward. Torquing to about 40lbs and leaving the trust bearing cap at only 10lbs. After this I move the crank in and out a few times with a rubber mallet. I torque everything to spec and in order and the crank siezes. If I loosen ONE bolt at the rear thrust bearing main cap, the crank turns like it's supposed to.
I talked to the machine shop that checked the crank and they reassured that the crank is like new and that there is a problem with the bearing, maybe they aren't correct. Keep in mind that EVERYTHING is standard size on this engine, the crank wasn't grinded down, just polished.
I used some plastiguage for the oil clearence and that is within spec, at the limits but still passable. When I removed everything to check if there was something in the way and I found that the thrust bearing was used (shiny silver) on the edges, 4, 5, and 3 mains were perfect and main #1 was used on the upper bearing, the lower was still grey.
I don't get what's going on... The crank is straight... any ideas please?
I start with the middle main caps, then move outward. Torquing to about 40lbs and leaving the trust bearing cap at only 10lbs. After this I move the crank in and out a few times with a rubber mallet. I torque everything to spec and in order and the crank siezes. If I loosen ONE bolt at the rear thrust bearing main cap, the crank turns like it's supposed to.
I talked to the machine shop that checked the crank and they reassured that the crank is like new and that there is a problem with the bearing, maybe they aren't correct. Keep in mind that EVERYTHING is standard size on this engine, the crank wasn't grinded down, just polished.
I used some plastiguage for the oil clearence and that is within spec, at the limits but still passable. When I removed everything to check if there was something in the way and I found that the thrust bearing was used (shiny silver) on the edges, 4, 5, and 3 mains were perfect and main #1 was used on the upper bearing, the lower was still grey.
I don't get what's going on... The crank is straight... any ideas please?