Crankshaft

[Sean (TX)]

Nope I dont need any crank shaft work done...Just wondering thou...I know they grind and polish the crank...But what about the rods...Lets say you spun a bearing...What exactly is done to the rod? Do they line bore the rods for over size bearings as well as the crank?? Someone has been there done that!!

 

[Charles Krammin]

Rod bearing do not spin in rods. they only spin and mar crankshaft and bearing insert. Solution. Grind crank undersize and buy new oversized bearings to fit undersize crank.
Charles Krammin SW MI

 

[Sean (TX)]

What if the rod was knocking? Seems like some damage could be done to the rod?

 

[John (TR)]

What they do is like line boring the block. They take the cap off and take off a few thousandths, then put the cap back on and re-bore to spec. Both my rebuilds have had this done.

 

[Sean (TX)]

(quoted from post at 20:37:59 07/20/10) What they do is like line boring the block. They take the cap off and take off a few thousandths, then put the cap back on and re-bore to spec. Both my rebuilds have had this done.

hanks John...I know ya been thru a couple engines..

 

[ZANE]

Bearing certainly do sometimes spin in the rod. I've seen it many times in my 60 plus years as a mechanic. Rods that have spun a bearing can most times be fixed if not too bad.

Zane

 

[mobydick]

The large end of your con rod is spun in or is distorted and needs to be reconditioned. just as important as the crankshaft being on size.
The machine shop cuts the cap and rod at the parting and now it is egg shaped. Now they hone out the rod until round and on original size.

 

[Anonymous-0]

charles, i don't quite understand how that works. napaguy

 

[Sean (TX)]

(quoted from post at 21:57:00 07/20/10) Bearing certainly do sometimes spin in the rod. I've seen it many times in my 60 plus years as a mechanic. Rods that have spun a bearing can most times be fixed if not too bad.

Zane

Thanks for the info, Zane..

 

[Sean (TX)]

(quoted from post at 07:17:56 07/21/10) The large end of your con rod is spun in or is distorted and needs to be reconditioned. just as important as the crankshaft being on size.
The machine shop cuts the cap and rod at the parting and now it is egg shaped. Now they hone out the rod until round and on original size.

Thanks for the info!!