51 B Cylinder Leakage Amount

ndgregor · Apr 4, 2017

I was able to run a leakdown test on each cylinder and the LH side is about 20% and right side 23%. Is this okay? Or does this indicate a rebuild is in order? According to the gauge this is low leakage. The leakage is through the piston rings.

Resting Relics 1 · Apr 5, 2017

I think your over analyzing these old two cylinders. They will run fine with some wear. Leak down test seems a little much. If it starts and runs decently and doesn't burn a lot of oil, it's fine. Have fun!
John

BushogPapa · Apr 5, 2017

I would not "Judge" it until you have WORKED it good for several Hours...

These babies were built to WORK, not to idle around all day long...

Hook it to a disc, Plow or Drag and let it BARK...!!!

BushogPapa · Apr 5, 2017

New rings are a simple job..even it there is some taper in the bore. ( unless you actually feel like handling the Block for a re-bore).

JUST as long as you have a GOOD Ridge-Reamer...that Ridge MUST be completely removed before you put New Rings in that Bore..

MEANJDK · Apr 5, 2017

If you do decide to put new rings in, know that your B will have a ridge of about 1 1/8". I know cuz I just had my 51 B apart and most ridge reamers have about 5/8" cutter. Locate the right reamer before you tear it down.

51 B Cylinder Leakage Amount

ndgregor

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Resting Relics 1

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BushogPapa

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BushogPapa

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MEANJDK

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