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Budget 390 FE Engine Build Dirty Oil Indicates Trouble

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A lot of trash in the Cobra T-pan indicates oil contamination with finite metal particles. Some of this is moly-based assembly lube, but there's more. We're convinced piston-to-cylinder wall clearances are excessive. Our 4.050-inch bores have already been punched 0.030-inch oversize. We'll have to take it 0.010 inch more because we're on the high side of 0.030 inch.
Budget FE Power! - Part 1 in a Two-Part Series

 A lot of trash in the Cobra T-pan indicates oil contamination with finite metal particles. Some of this is moly-based assembly lube, but there's more. We're convinced piston-to-cylinder wall clearances are excessive. Our 4.050-inch bores have already been punched 0.030-inch oversize. We'll have to take it 0.010 inch more because we're on the high side of 0.030 inch.  View Related Article

 

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