01-03-2025, 04:33 PM
Hi Folks,
Just another renew of this thread.
I have been installing a Hadley Crank and Rods into a sand cast Nippy Crankcase.
I recently installed the block pistons and rods only to find clearance issues.
I tried fitting the angled rods one way round and they fouled the camshaft so I turned the rods around with the result that the big end bolts fouled the inside of the crankcase.
As it is easier to relieve the crankcase that is what I am currently doing the big end bolts foul the case higher up than the recesses in the Nippy case and only for about 1/4" of crank travel.
I have laid the Crankcase on its side and put a workshop vacuum cleaner hose into the oil filler hole and have been hand scraping away at the wall to get sufficient clearance for the rod bolts.
I was tempted to grind a small amount from the Big End Bolt heads which would have been easy to do on the lathe with its grinder attachment but I decided against doing that as the rotating assembly has all been balanced.
Once I am happy with clearance it will all be vacuumed and wiped out followed by copius flushing with brake cleaner before I close up the bottom end.
Just another renew of this thread.
I have been installing a Hadley Crank and Rods into a sand cast Nippy Crankcase.
I recently installed the block pistons and rods only to find clearance issues.
I tried fitting the angled rods one way round and they fouled the camshaft so I turned the rods around with the result that the big end bolts fouled the inside of the crankcase.
As it is easier to relieve the crankcase that is what I am currently doing the big end bolts foul the case higher up than the recesses in the Nippy case and only for about 1/4" of crank travel.
I have laid the Crankcase on its side and put a workshop vacuum cleaner hose into the oil filler hole and have been hand scraping away at the wall to get sufficient clearance for the rod bolts.
I was tempted to grind a small amount from the Big End Bolt heads which would have been easy to do on the lathe with its grinder attachment but I decided against doing that as the rotating assembly has all been balanced.
Once I am happy with clearance it will all be vacuumed and wiped out followed by copius flushing with brake cleaner before I close up the bottom end.