So I bought a supposed to be, Trygstad built and balanced crank for a 800ho rev motor, from a fellow snowester on here. Started final assy of topend and have some strange binding while turning motor over by hand. After closer exam and checking clearances of piston to cyl wall, ring end gap, and cylinder final plate dimension, we have reached the conclusion that pto side rod is very very slightly bent. It is causing the piston to bind in the bore. Top edge of piston is tight and opposing bottom portion of skirt is tight. My question is have any of you ever straightened a rod like this with any success? It sounds scary to me but I have never encounterd a bent rod before. Obviously we would brace the rod and secure it so as to not put any side load on lower rod bearing. Any input would be appreciated! Thanks in advance.
can a rod be straightened?
- Thread starter chumbilly1
- Start date
R
rev_rider800
Well-known member
You're in need of a new crank boss...hopefully that crank you've got isn't welded, otherwise it's not even good as a core. Actually, I might have a rod kit available for it and and could probably just replace the rod so you maintain the lightweight crank...
Call or text if you're interested
763 238 1292
Lefty
Call or text if you're interested
763 238 1292
Lefty
Cmon someone has tried this ???? I am talkin about movin the rod 0.001 +/-.
If the clearance in the cyl. wall to piston is 0.005 and the piston is 4 times wider than the rod end, it is a f'in tiny amount it needs to move!
If the clearance in the cyl. wall to piston is 0.005 and the piston is 4 times wider than the rod end, it is a f'in tiny amount it needs to move!
yeh thats the direction we are leaning.
