Ring gap do you still need tocheck witha complete set

old · Nov 25, 2016

So I have a 1020 JD that I am rebuilding the engine. New sleeve set new pistons and all. Do you need to check ring gap when you buy a set like this?? I know on car engines you have to just so you do not get a set that will be to tight. I am thinking I will do it but it would save time if I didn't have to

dr sportster · Nov 25, 2016

Yes .

CenTex Farmall · Nov 25, 2016

I would check.
99% chance it's already OK, but you want to eliminate that last 1%.

ditchwitch · Nov 25, 2016

Its not going to hurt that's for sure.

guido · Nov 25, 2016

Hello old,

Yes! Just part of the overhaul procedure..........

Guido.

retired farmer · Nov 25, 2016

If your luck is like mine, you could end up with the odd defective one.

Billy Shafer · Nov 25, 2016

Saving time can come back to bite you.

JOCCO · Nov 25, 2016

Old: yes yes yes I would check all parts prior to assembly to rule out the wrong size, defective, some one put .40 over in the .10 box etc.

David G · Nov 25, 2016

Yes, check it

John B. · Nov 25, 2016

If you would do it on a car why wouldn't you do it on a tractor? An engine is an engine. Unless you want them to fit tight and sieze up. It's up to you...

JD Seller · Nov 25, 2016

Old the only time I do not check them is when they come already on the piston and the piston is in the sleeve. On these I just slide the piston down enough to install the wrist pin. All others I check the ring cap.

T.R.K. · Nov 25, 2016

They probably will be o.k. BUT I always check them too. And I have occasionally found a ring in the set that was too tight-not enough gap. Which is why i check them. . . . Better to take the time now, than regret not doing it later on.

Rings without enough gap bust the ring lands in the piston and may ruin the cylinder too.

old · Nov 25, 2016

On a car or truck engine you do not have sleeves so the bore can varies a lot over time so you have to check ring gap when you put in new rings but on a sleeve type engine one would think the rings where made to fit that sleeve they come with

showcrop · Nov 25, 2016

Ring Gap Table Instructions
1.
This table is in inches. If you are measuring your bore in millimeters, you will need to convert to inches by dividing your bore size by 25.4.
2.
Multiply your inch bore size by the “Bore x” column for your application to determine the end gap.
Example: For the top ring of
an ATV with a 4.0” bore, multiply 4.0 X .004 = .016
Application

Dirt / ATV / Snow / PWC
.0040”
.0050”
High-Performance Street / Strip
.0045”
.0055”
Street-Moderate Turbo / Nitrous
.0050”
.0055”
Late Model Stock
.0050”
.0055”
Circle Track/Drag Race
.0055”
.0060”
Blown Race Only
.0065”
.0070”
Nitrous Race Only
.0070”
.0075”

If they are not within spec you cut one end down a little with your ring grinder.

Ring gap do you still need tocheck witha complete set

old

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dr sportster

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CenTex Farmall

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ditchwitch

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guido

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retired farmer

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Billy Shafer

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JOCCO

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David G

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John B.

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JD Seller

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T.R.K.

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old

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showcrop

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