rake60
Well-Known Member
- Joined
- Jul 8, 2007
- Messages
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For a close but free moving piston to cylinder fit lapping is best.
If your piston is dead nuts round and straight, a home made hone can
be used to bring the cylinder to a perfect fit.
I use the piston to lap the cylinder bore to a perfect fit. I cut piston for a
close but movable fit to the bore then coat it with my favorite lapping
compound. (Plain Crest toothpaste). It's abrasive enough to lap the soft
metals but will wash out cleanly and completely with warm water.
I assemble the engine and spin it with a cordless drill chucked to the end
of the crankshaft until the fit is what I want it to be.
Is it the best way? Probably not, but it works for me every time.
Rick
If your piston is dead nuts round and straight, a home made hone can
be used to bring the cylinder to a perfect fit.
I use the piston to lap the cylinder bore to a perfect fit. I cut piston for a
close but movable fit to the bore then coat it with my favorite lapping
compound. (Plain Crest toothpaste). It's abrasive enough to lap the soft
metals but will wash out cleanly and completely with warm water.
I assemble the engine and spin it with a cordless drill chucked to the end
of the crankshaft until the fit is what I want it to be.
Is it the best way? Probably not, but it works for me every time.
Rick