crank shaft turning

[hypedz34]

hey guys earlier i posted a problem with my z34 rod bearing.well i have to tear the engine down now and replace the bearings but my question is the bearing is tapping but not hellaciously.does this mean i can save myself money and have the crank shaft turned or do i have to get a whole new crank shaft?

[Superdave]

You should be able to get a reman crank through a machine shop for about the same cost as having one turned. It'll come with the proper sized bearings just make sure to plastigage all of them.

[IsaacHayes]

Or take one from a 3.1/3100/3400 ....

[hypedz34]

if i was to take the crankshaft from a say a 3400 would it effect performance?or are both cranks the same?also about how much would a reman crank be?

[Superdave]

same exact crank as you have, i bought a reman for around $250 or so a few years ago.

[geoffinbc]

I had my crank turned .010/.010 it cost me $130

[Schurkey]

Buying a crankshaft-in-a-box is likely to get you a crank that's been turned to the minimum-diameter end of the tolerance specs. This may not be what you want; as the bearing oil clearance will be at a maximum. If your block/main caps, or your rods are similarly on the big side of the specs, your oil clearance can get to be too large.

Given any choice, I'd take the crank AND the block/caps/rods you have to a machine shop so the main- and rod-bearing saddles can be measured, and then have the shaft custom-ground so the oil clearance is where you want it.

Be sure they leave a decent fillet radius on those journals, too.

If the knock is from the rods, you'll undoubtedly need to have at least some of the rods resized as well.

As soon as you open the engine, you run into a world full of "might as well..." and "gee, as long as I'm in there..."