Bent Rods

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Dave Young
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Bent Rods

Post by Dave Young » Mon Sep 09, 2024 9:43 pm

Does anyone know if Kohnke Rebabbitting is still in operation? I’m suspecting that I have a few bent rods in a newly done engine and would like to have them all checked. Herm had done excellent work for me in the past and I do know that his son was continuing the business after his passing, but haven’t had any luck reaching him. Also, who else is reputable for rod straightening nowadays?


Junk poor
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Re: Bent Rods

Post by Junk poor » Mon Sep 09, 2024 10:09 pm

IMG_8599.png


J and M Machine
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Re: Bent Rods

Post by J and M Machine » Tue Sep 10, 2024 8:35 am

Yes he in business and his name is John


Topic author
Dave Young
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Re: Bent Rods

Post by Dave Young » Tue Sep 10, 2024 2:01 pm

Thanks guys. John sent me his cell number.


Kerry
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Re: Bent Rods

Post by Kerry » Tue Sep 10, 2024 6:09 pm

It's not rocket science to make your own mandrel to check them, they can even be realigned in a good 6" bench vice.


speedytinc
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Re: Bent Rods

Post by speedytinc » Tue Sep 10, 2024 6:26 pm

Dave, since you are sharp enough to be concerned about bent rods, you know how to avoid bending them during piston installation & removal.
I will say, I check every rebabbited rod I get before installing. Around 1/2 from suppliers are out of square/bent.
I have found bent rods in fresh rebuild motors that I had to go thru to correct builders errors.
Trust but verify.

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RajoRacer
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Re: Bent Rods

Post by RajoRacer » Tue Sep 10, 2024 6:45 pm

I agree with John, even though you pay "good money" for re-Babbitted con. rods, one should verify that they are straight !

Stevens & KR Wilson both made superior tools for checking rods - I also have a flywheel attachment for setting magnet heights for my Stevens.
Attachments
Stevens fixture.JPG


speedytinc
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Re: Bent Rods

Post by speedytinc » Tue Sep 10, 2024 6:52 pm

Luvin' the flywheel attachment.
I got some building to do.

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RajoRacer
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Re: Bent Rods

Post by RajoRacer » Tue Sep 10, 2024 9:41 pm

I took the idea from the Ford Service Manual !


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Re: Bent Rods

Post by Allan » Wed Sep 11, 2024 3:36 am

This is my Ausrtalian made set up for rod aligning.
20240911_164947.jpg
20240911_165016.jpg
Instead of multiple round mandrels to take multiple sized rods, it comes with just 3 machined square mandrels. These can take rods as small as T up to large diesel truck rods. My local machine shop never had a use for their small one, so it was given to me.
20240911_165016.jpg
10 years later my cousin found the matching precision vice used to straighten rods.
20240911_165044.jpg
Allan from down under.
Attachments
20240911_165106.jpg


Topic author
Dave Young
Posts: 235
Joined: Sun Feb 24, 2019 9:37 pm
First Name: David
Last Name: Young
* REQUIRED* Type and Year of Model Ts owned: 26 Touring, 26 RPU, 24 Coupe, 26 Speedster, 28 Chandler, 29 Chandler, 29 A
Location: Mays Landing, Nj

Re: Bent Rods

Post by Dave Young » Wed Sep 11, 2024 7:58 am

I’d sure like to find one of these fixtures


speedytinc
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Re: Bent Rods

Post by speedytinc » Wed Sep 11, 2024 8:12 am

The fixtures show up @ swap meets occasionally but, the seals are rarely with them & a hard find.
Simple, functional substitutes can be made from about a 4" notched square plate.

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