- Aug 14, 2014
- Reaction score
- Madison, WI
- My Car
- 1971 M-Code Mach 1 w/408C stroker
Ingeresting. I dont remember my Molnar having the holes through. Does anyone have a pictures of these through holes? There would be very deep.The bolt holes go all the way through so the oil in the pan gets slung onto the holes and since the thread to thread seal is not perfect, oil makes its way to the front side of the flywheel/flexplate and down. If it makes it alll the way to the backside of the flywheel it will ruin the clutch. It usually put 1-2 drops on the ground every time you park it after driving it. Some say just use a boat load of lock-tite and it won't leak. It didn't work for me on the 408C. I still need to pull the transmission to seal it up. What did work on the Boss 347 build was a thin coat of Grey Stuff on the crank to flywheel mating surface, lock-tite on the flywheel bolt threads, and Grey Stuff under the heads of the flywheel bolts. The threads need to be clean and dry. Who knows, perhaps your luck is better than mine. P.S. The B347 crank was a Molnar, also through drilled. ChuckWonder if it's more common with the old cranks? I'm also curious about what another member was saying about it coming through the flywheel bolt holes?Had a 392 Windsor stroker built several years ago with a Scat crank by a knowledgeable race-type shop. They put in a 1 piece rear seal. Got it installed an running and sure enough had a rear main seal leak. Took it back and builder disassembled everything and double checked it. Said there were no problems that he could find. He agreed to put it on the dyno to make sure before I took it back and sure enough, after a few runs, small drops of oil on the floor. Could find no issues with machining or assembly. I just happened to be checking out another nationally recognized custom engine builder that specialized in Ford FE engines and noticed that in his quote he would not guarantee no rear main leaks using Scat cranks. Don't have any reason why. Someone here mentioned the drilling on the flange, but I have no Idea. Motor was strong and reliable but I had to just learn to live with a little oil leak. Not a Cleveland, but maybe similar experience to others with stroker engines and Scat cranks in a Ford.
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