ive asked a number of people on this one and its pretty much the deciding factor in which direction (namely how much $$$) i end up going with. im desperate need of a fresh top end, i have virtually no compression.
heres what ive got, a fairly clean cylinder that measures 66.25mm square (round?) on a non precision caliper. the biggest issue are the exhaust bolt holes. both of them were previously stripped out and pretty much didnt stand a chance of holding bolts. i have properly heli coiled both holes, and they seem to torque down very well. however one of the flanges are cracked completely through from the outside of the thread, from the bolt outward. not from the exhaust port to the bolt. please see accompanying picture:
sorry about the quality, but holding the resonator out of the way to snap a pic with one hand makes for fuzzy pics. either way it tells you where the crack is. yes, im aware of the fact that there is no exhaust donut (gasket or whatever the technical term is) but that isnt too much of an issue as the fact that the motor barely has 1:1 compression... hence dosent run. ill be getting one in the very near future.
with all that said, should i seek another cylinder, or try to bore what ive got? im familiar with welding and i may have access to the equipment to weld the crack, but im guessing this is cast aluminum and im sure it requires specific wire/rods to weld... if possible at all.
also, will the heli coils hold up? they have been properly installed with the correct drill bit and tap, so theyre in there pretty solid.
im trying to avoid, if at all possible, dropping a ton of money in another cylinder. having this cylinder bored and getting the proper piston and rings is within the price i can afford and still be able to add some much needed parts, as well as a few extras.
any thoughts or suggestions would be highly appreciated
heres what ive got, a fairly clean cylinder that measures 66.25mm square (round?) on a non precision caliper. the biggest issue are the exhaust bolt holes. both of them were previously stripped out and pretty much didnt stand a chance of holding bolts. i have properly heli coiled both holes, and they seem to torque down very well. however one of the flanges are cracked completely through from the outside of the thread, from the bolt outward. not from the exhaust port to the bolt. please see accompanying picture:
sorry about the quality, but holding the resonator out of the way to snap a pic with one hand makes for fuzzy pics. either way it tells you where the crack is. yes, im aware of the fact that there is no exhaust donut (gasket or whatever the technical term is) but that isnt too much of an issue as the fact that the motor barely has 1:1 compression... hence dosent run. ill be getting one in the very near future.
with all that said, should i seek another cylinder, or try to bore what ive got? im familiar with welding and i may have access to the equipment to weld the crack, but im guessing this is cast aluminum and im sure it requires specific wire/rods to weld... if possible at all.
also, will the heli coils hold up? they have been properly installed with the correct drill bit and tap, so theyre in there pretty solid.
im trying to avoid, if at all possible, dropping a ton of money in another cylinder. having this cylinder bored and getting the proper piston and rings is within the price i can afford and still be able to add some much needed parts, as well as a few extras.
any thoughts or suggestions would be highly appreciated
