Reply to "Girdle"

larrywMember

George,

Is "cap walk" in a two bolt main engine at stressful RPMs a side to side or a fore and aft sliding movement?

Could it be restrained by, say, short hardened .250" dia. dowels fitted into holes drilled into the cap and block in lieu of four bolt caps? They could be positioned where the outer bolts of a four bolt cap would usually go and, being much smaller than a 3/8" bolt, would not compromise the two bolt caps(?).

An align bore would probably be a good idea afterward.

Or is it actually the cap lifting away from the block due the elasticity of the two bolts (or studs) stretching and recovering that the two outboard bolts of a four bolt cap reinforce?

5/4/105:10 PM

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