Crankshaft Kit

[GOBR]

If the crank journals arent real shiny (lookin like a mirror) Ill do the crank kit. Im pretty sure this motor has never been torn down before so it should be stock crank. Im debating on doing pistons also......... I might as well right? I mean a set of pistons come with the rings and I have the press to fit the wrist pins. Hopefully I can get by without having to get a crank. I figure the pistons have to come out so I might as well get new ones and hone the bores. Im thinkin of upping the comp a lil bit also. Maybe 9.5:1? Any suggestions?

 

[HotRodPC]

If you're just going to hone the cylinders, I wouldn't waste the money on new pistons. Also on a re ring, don't go for something like plasma or moly rings. They'll be way to hard to get seated in just a honed motor, and with a worn bore, won't scrub the cylinders hard enough to find a home. I'd just go for a standard cast rering and bearing job unless you intened to do bore the block and replace the pistons, then I'd go for all the little extras to make the motor last longer and tolerate some abuse. Maybe just a re ring job with new oil pump and timing chain set, lap the valves and replace the valve seals and call it a re rung motor. If it's not out of tolerance, should be good for 50-75,000 miles.

 

[crazy4offroad]

This might help as far as judging the crank...
Unacceptible on left, acceptible on right

You can see where the rod "slapped" the crank in the bottom portion of the left journal, distorting its roundness. As far as the right one if everything mics OK and you can get 0.002" clearance that's all you need.

 

[GOBR]

Ill prolly just get a crank and some new rings and a oil pump. Just to get it goin where i dont have to worry bout it. In the mean time Ill start pickin up bits and peices for another build. Might even go find a BBC block somewhere

 

[HotRodPC]

This might help as far as judging the crank...
Unacceptible on left, acceptible on right

You can see where the rod "slapped" the crank in the bottom portion of the left journal, distorting its roundness. As far as the right one if everything mics OK and you can get 0.002" clearance that's all you need.

That crank is beyond just polishing. Likely to clean up at .010/.010 though. Hopefully his won't look like that though. Sounds like he might have caught it in time to save the crank and just go with new bearings and oil pump.