A 5M & 6m head are the same basic casting. as for the head bolts, check them very carefully for thread damage, and chase the threads in the block. You can torque the original bolts to 75 or whatever turns your crank, but they were designed for 58+ lbs.. It is probably reasonable to torque them to 65 if they are in good shape & you are using a stock gasket, if you use a metal gasket it is really worth while to put ARP studs in & torque them to manufacturer spec.
6M torque specs question?????
I'm rebuilding my 6M and understand the differences that the 6M brings to the rest of the motor, but my question is what torque specs should I use when putting it back together?
Options are:
A.) Since it's a 7M crank and rods, should I use the torque specs for the 7M when putting the mains and rods together?
B.) Do I use the 5M specs which are all a bit lighter?
C.) Should I just close my eyes and reef on it till my "f'd up wrist from hockey" gives out?
Much appreciated..
As a side note, I'm letting my 11 year old son pick out the paint colors for the motor. this could be interesting and I'll be sure to put up some pics. I'm psyched he'll come out and help me with this so it's a damn good trade off.
Here is a "before" picture:
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Options are:
A.) Since it's a 7M crank and rods, should I use the torque specs for the 7M when putting the mains and rods together?
B.) Do I use the 5M specs which are all a bit lighter?
C.) Should I just close my eyes and reef on it till my "f'd up wrist from hockey" gives out?
Much appreciated..
As a side note, I'm letting my 11 year old son pick out the paint colors for the motor. this could be interesting and I'll be sure to put up some pics. I'm psyched he'll come out and help me with this so it's a damn good trade off.
Here is a "before" picture:
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