Piston pin bushings

pburchett · Mar 30, 2019

Is it possible to ream piston pin bushings with an adjustable hand hone or reamer such as the generic photo below or do I just need to visit the machine shop

Dieseltech · Mar 30, 2019

Sizing pin bushings should be done on a machine, like Sunnen..

gab · Mar 30, 2019

Machine shop work, Sunnen machine.

Steve@Advance · Mar 30, 2019

No, piston pin bushings are sized on a precision honing machine.

Not only is the size extremely critical, the bore must be held in exact parallelism to the crank end bore.

Both are impossible trying to hand ream.

dr sportster · Mar 30, 2019

You have to keep the reamer straight. On a side note I have a Sunnen hone for sale with lots of tooling. Some theory is the Sunnen hone imbeds grit into bronze bushings and reamers should be used.

Richard G. · Mar 30, 2019

I watched a machinist hone my 39 JD A pin bushings on a machine and he was holding the rods with his hands.
I have used reamers by hand putting new bushings in Model T transmissions. There are quite a few bushings in a T tranny.
Worked great. Just go slow.
Richard in NW SC

teddy52food · Mar 30, 2019

They are fitted with a clearance of 3 to 5 ten thousands. Think you can do that by hand??

flying belgian · Mar 30, 2019

Depends. Is this on a show or hobby tractor that only sees 10 hours running per year? Better yet if this is a slow running engine. Or is this on your pu. that gets 50,000 miles per
yr.?

Fritz Maurer · Mar 30, 2019

Where is this machine located?

rustred · Mar 30, 2019

umm , all depends what u are working on, a patch job or precision job. its machine shop work and even temperature plays a roll in the fit. the same machine is used to resize the crank end also. I don't see how the average person can do it without the specialized measuring tools and equipment. the pin end is more a feel fit also.

J. Schwiebert · Mar 30, 2019

You did not say what you are working on engine wise, but some diesel rods are also line bored to the correct length!

UncleTom · Mar 30, 2019

A reamer would be a Hack Job.

dr sportster · Mar 31, 2019

It is in DeLand Florida .See the ad in Hemmings motor news under "tools and equipment"

pburchett · Apr 1, 2019

Called the machine shop. They can do it $15 per rod. Will have it there Wednesday afternoon.

Piston pin bushings

pburchett

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Dieseltech

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gab

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Steve@Advance

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dr sportster

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Richard G.

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teddy52food

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flying belgian

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Fritz Maurer

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rustred

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J. Schwiebert

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UncleTom

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dr sportster

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pburchett

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