Quote:
Originally Posted by shermanator2
I once pulled apart a SBC that had a trashed thrust bearing and trashed thrust surfaces on the crank. The engine had not been apart before. When I went to reassemble the engine with a different crank, the end play went to zero when the cap was tightened. I checked the side clearance between the thrust surface of the loose bearing and the crank with a feeler gauge and it looked perfect. I tried the whack it back and forth technique to no avail. It still tightened up when the cap bolts were torqued.
On further examination, I noticed that the corner where the thrust sides of cap and block met the main bearing surface was sharp. There was no chamfer from the factory. When the cap was tightened, that sharp corner pushed into the inner radius of the bearing and flared out the thrust surfaces of the bearing against the crank thrust surfaces. This factory defect had trashed a nice forged factory crankshaft.
I chanfered the corners by hand with a die grinder and all was well from there.
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I'll keep that in mind while I'm trying things out. Thanks
Quote:
Originally Posted by 67Fbird
^^^yup and as I learned assembly lube is ....FAT!!!!! oil doesn't squeeze very well and grease DOES NOT squeeze at all! When you have 2 FLAT surfaces grease is "extra"....
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I did use the gooeyest of assembly lubes LOL. I'll try cleaning it off of the thrust surfaces while I'm in there.
Quote:
Originally Posted by lust4speed
Just want to clarify that loosening #4 and whacking the crank to the back and then forward really isn't to square up the cap but to simply set the bearing halves in better alignment with each other. Even though it feels like the bearings are an interference fit when slid on, it's surprising how two or three thousandths can be found.
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Just setting the alignment, got it