FelipeCobu
Member
Hi,
A few weeks ago my 70cc engine seized - by the time it has not more than 30 miles of work-, disassembling it I found massive bearing failure.
Next to it I had my crank trued and I balanced It, rebuilt the engine w/ quality bearings (INA and SKF) using heat/colt method.
When bolting the case halves together I discovered that my crankcase haves misalignment because when I tight the bolts the crank can't spin free.
I give it a few beats and more heat and torqued the bolts some way that the crank spins - not free as I would - but spinning.
Last night I figured out my engine trying to seize again, I stoped it and removed the clutch assembly, magneto cover and the piston jug and header, noticed the crank was too tight, not seized. Torqued down the bolts as I do before and again the cranks can spin almost free.
I'm considering leave this engine some time idling as a "break in" and see if this if it gets free. What else can I do? Any suggestions? Do someone had the same issue?
Thanks!
A few weeks ago my 70cc engine seized - by the time it has not more than 30 miles of work-, disassembling it I found massive bearing failure.
Next to it I had my crank trued and I balanced It, rebuilt the engine w/ quality bearings (INA and SKF) using heat/colt method.
When bolting the case halves together I discovered that my crankcase haves misalignment because when I tight the bolts the crank can't spin free.
I give it a few beats and more heat and torqued the bolts some way that the crank spins - not free as I would - but spinning.
Last night I figured out my engine trying to seize again, I stoped it and removed the clutch assembly, magneto cover and the piston jug and header, noticed the crank was too tight, not seized. Torqued down the bolts as I do before and again the cranks can spin almost free.
I'm considering leave this engine some time idling as a "break in" and see if this if it gets free. What else can I do? Any suggestions? Do someone had the same issue?
Thanks!