Does anyone do leak down test after new MLS HG before completing assembly? Are heat cycles necessary for gasket to seal properly? My leak down results before start up are not good. Head was tested, machined .008, new stem seals. Block was decked 90k ago. Compression was good before disassembly. Leak down and chemical test confirmed BHG. Since the block shined up I have tried new MHG again before completing assembly or deciding to deck the block again or go back to composite gasket. Please share your experience.
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