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Does Kohler CH22 need oversize rings

#1

A

allis

I have a Kohler CH22 engine and the bore is 3.253 and is supposed to be 3.249 do I need over sized rings? Thanks


#2

R

Rivets

First question, are you sure you have a CH22? According to the manual I have attached, the bore size should be 3.1496/3.1506". Maybe I'm missing something? Second question, how and where did you measure the bore? To properly measure a cylinder you should be taking six measurements, top, middle and bottom. Then remeasure top, middle and bottom 90 degrees for your first measurements. Doing it this way will give you a more accurate assessment of cylinder condition as to wear, out of round and taper. At the cost of new Kohler pistons and rings, I suggest that you do these measurements at least twice if not three times, to make sure you have a very accurate picture of how to proceed. If your tag says CH22, where did you get your specs, as I said I may be wrong. Go to this site and type in CH22 to get your manual, for some reason I can not get the manual to attach.

Http://www.kohlerengines.com/manual/landing.htm


#3

A

allis

Sorry about that, By the time I left my shop and decided to post I forgot. I doubled checked it and it goes from 3.152 to 3.153 If I hone it out can I use the .010 oversize rings ? thanks allis


#4

ILENGINE

ILENGINE

Not without going to the .010 oversize piston also. You will most likely need to have it bored oversize to get everything back in true.


#5

R

Rivets

Did you measure the cylinder the way I posted or just at the top? Unless you take all six measurements it is very difficult to give you a good answer. Two other questions, how do you plan on honing the cylinder? Have you measured the crankpin? Most of the time in the past I have found that the customer will need to replace the rod and cut the crank, as they are near the wear limit also. I just don't want to give you answers which may cost you to spend more money than the engine is worth.


#6

BlazNT

BlazNT

1. I personally would never use over sized rings with out the over sized pistons.
2. I would not make a decision until I had finished the honing job. Honing will increase the bore.
3. You also need to crosshatch.

You can normally get this done for around $25 per cylinder.


#7

ILENGINE

ILENGINE

BlazNT said:
1. I personally would never use over sized rings with out the over sized pistons.
2. I would not make a decision until I had finished the honing job. Honing will increase the bore.
3. You also need to crosshatch.

You can normally get this done for around $25 per cylinder.
Click to expand...

I wish I could get cylinders bored for $25 per cylinder last twin cost me $168


#8

BlazNT

BlazNT

ILENGINE said:
I wish I could get cylinders bored for $25 per cylinder last twin cost me $168
Click to expand...

Wow that just seem real high. My son got his turbo 4 cylinder done for $200 and some change just last year.


#9

ILENGINE

ILENGINE

The old shop that I used to use for boring before they closed was $40 per cylinder, 15 years ago. The only place within 70 miles of me now charges $80 plus supplies


#10

R

Rivets

The shop I use costs $75/cylinder, which includes glaze honing. I never send anything in until I know exactly what all needs to be done and will not do just a cylinder if I feel the engine also needs crank work or a different size rod. Also I will not use an old rod with a new piston. Yes, this does cost me some work, but when I'm done I know that it was done right. That's why I asked the OP for all those measurements. If the sizes he posted are very accurate and the cylinder is not out of round or tapered, he may be able to just glaze hone the cylinder and use a standard size piston and rings. Before I did this I would be triple checking all my measurements, as he is on the border and I can not see the condition of the cylinder. As I said just taking and giving us one measurement, is not being fair to us who are trying to give him guidance in how to proceed. Many on this forum say that what I do is overkill and it can be done cheaper, but my rep is on the line every time I do one and in this business you don't last long using short cuts. Found they come back to haunt me.


#11

BlazNT

BlazNT

Rivets said:
The shop I use costs $75/cylinder, which includes glaze honing. I never send anything in until I know exactly what all needs to be done and will not do just a cylinder if I feel the engine also needs crank work or a different size rod. Also I will not use an old rod with a new piston. Yes, this does cost me some work, but when I'm done I know that it was done right. That's why I asked the OP for all those measurements. If the sizes he posted are very accurate and the cylinder is not out of round or tapered, he may be able to just glaze hone the cylinder and use a standard size piston and rings. Before I did this I would be triple checking all my measurements, as he is on the border and I can not see the condition of the cylinder. As I said just taking and giving us one measurement, is not being fair to us who are trying to give him guidance in how to proceed. Many on this forum say that what I do is overkill and it can be done cheaper, but my rep is on the line every time I do one and in this business you don't last long using short cuts. Found they come back to haunt me.
Click to expand...

You are always the word of caution. I love when you throw you .20 cents worth in. Always reminds me of the thing I forgot to put in my post.
Everyone that helps on here has their own style. So don't you go changing yours. I and others(they may not admit it) depend on your ability to remember every detail that needs to be thought about.


#12

R

Rivets

Only worth $.02, read my signature.


#13

A

allis

[Thanks for all of the advice and info, I did measure at top, middle and bottom and then at 90 on both cylinders two times. I do not think the engine is worth putting a lot of money in it. This forum is the best that I have been involved with for I got more info and quick response than any other forum I have asked info from. allis


#14

R

Rivets

If you give me all six measurements and you feel they are very accurate, I will give you my best guess as to whether it is worth sticking any money into.


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