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FE Power Forums => FE Technical Forum => Topic started by: ToddK on November 13, 2012, 04:16:47 AM

Title: How to separate connecting rods?
Post by: ToddK on November 13, 2012, 04:16:47 AM

I know there are tools available to split the cap from a connecting rod, but what is the best way to do it with a rod on a crankshaft?

I'm starting to dummy up an engine to measure piston deck height and was wondering what is the best technique to split the rod. These are Scat I beams and have rod bolts. I've done this before with rods that have studs and nuts, but not with bolts. I'm sure there has to be a simple method, but it's just not making itself obvious to my tiny brain.

Title: Re: How to separate connecting rods?
Post by: Barry_R on November 13, 2012, 06:23:20 AM

Brass drift punch (rod) and/or a hard plastic mallet work - just a clean sharp blow usually breaks things apart without damage.

Title: Re: How to separate connecting rods?
Post by: GJCAT427 on November 13, 2012, 06:26:47 AM

I usally back the bolts out a few threads and tap the heads of the bolt with a brass or fibre mallet. Then remove the bolts, remove the caps and push the rods out with the hammer handle.

Title: Re: How to separate connecting rods?
Post by: ToddK on November 13, 2012, 08:43:49 AM

Good idea to tap the heads of the bolts, why didn't I think of that? I'll give that a try.

Title: Re: How to separate connecting rods?
Post by: machoneman on November 13, 2012, 09:13:45 AM

A leather mallet, used often in woodworking. Can't damage a thing.

Title: Re: How to separate connecting rods?
Post by: lovehamr on November 13, 2012, 09:51:11 AM

Close to the same thing here, I just use a rubber mallet.  More bounce than a leather or fiber mallet but you shouldn't have to beat the crap out of it.