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GOSFAST · 05-31-2011, 03:35 PM

Just would like to place a "tip" here for all following this post...

when rebuilding these "Flatties" you MUST have the shop remove the crank plugs and clean the throws thoroughly. You will usually always find build-up and debri "caked" up in there. It's worse also if there were any spun bearings previously, if left as-is, the material finds it's way back into the fresh rebuild and just MAY cause the problem mentioned here.

"Boiling" the crank will NOT clean this area!

Not saying it is the issue here, but it definitely needs attention!

Thanks, Gary in N.Y.

P.S. We drill & tap EVERY crank throw, whether Ford or Merc, for some 3/8" NPT pipe plugs, this is done prior to balancing the unit!

05-31-2011, 03:35 PM	#33
GOSFAST Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 1,052	Re: Engine seized 2 miles after rebuild Just would like to place a "tip" here for all following this post... when rebuilding these "Flatties" you MUST have the shop remove the crank plugs and clean the throws thoroughly. You will usually always find build-up and debri "caked" up in there. It's worse also if there were any spun bearings previously, if left as-is, the material finds it's way back into the fresh rebuild and just MAY cause the problem mentioned here. "Boiling" the crank will NOT clean this area! Not saying it is the issue here, but it definitely needs attention! Thanks, Gary in N.Y. P.S. We drill & tap EVERY crank throw, whether Ford or Merc, for some 3/8" NPT pipe plugs, this is done prior to balancing the unit!