R2 4J sleeves(liners0

Are you sure there are no liners anywhere, aren't they the same as the D2 3J/5J? If there are no liners out there then resleeving the old liners is the obvious choice, new sleeves are not expensive, I was quoted about $US45 a sleeve here in Oz recently for 4-3/4" bore

There is a possibility that they would work, just a bout a 1/4 inch shorter and the top looks like they have a groove for the fire ring and the top of the sleeve is chamfered. Don't know how much difference this all makes. The two part numbers are not interchangeable. These are wet sleeves with o rings, you are saying they can be bored a out and a sleeve pressed in?

It is my understanding that wet liners can be fitted with new sleeves, Eddie Bedwell ("edb") talked to me about it a few years back when he noticed I had some old worn out D2 4U liners here, he suggested I hang on to them for re-sleeving if Cat were unable to supply new liners.

A press fit dry sleeve can be installed into another sleeve if there is plenty of meat to support boring and pressing of the original sleeve.

If you go to that much work why re-bore for a sleeve, just make it all?? WA7OPY

Hi WA7OPY
What material would you recommend to make a new complete liner.My guess is that a slug of cast, or steel hollow bar would be more expensive than a mass produced steel sleeve that can be purchased off the shelf.
machining the old liner to take the new purchased sleeve is a very straight forward job. But also machining a new complete liner from scratch would be straight forward as well.
Just wondering that's all !
Because I've noticed steel has got expensive lately.
Are the original liners cast steel or cast iron?

The preferred material for cylinder sleeves is centrifugal cast iron tube. If you search online for "spun cast iron" or centrifugal cast sleeve, you will find several vendors. This process produces a high quality tube with fewer defects than traditional static poured molds.

I did not say to machine new ones if you could buy them nos, but if none are available, use spun cast tube and machine them. They would be of lesser quality as cat sleeves were hardened and chilled (real good for wear). Most old engines will never see the usage after they are restored so it doesn't really matter. The liners for my D4 2T D4400 were 150$ from cat and 95$ nos from ww2, you could not buy the spun tubing for that price, but it is doable at the last resort....WA7OPY