Does anyone have any experience installing liner bands on CTP liners?  I am installing new liners in a D47U (D315) and I cannot get the liner bands to work.  When the bands reach the bottom of the counter bore they are too thick and keep the liner from going all the way down.  There is not really a lead in on the counterbore to kind of funnel them down in there.  The original Cat liners did not have a filler band but they used a copper shim to seal them up.  The shim I used on these is stainless so Im not sure that is going to work very well for sealing these up.  Do I have to use the filler band?

I have Never put a liner in a Cat but many in John Deere with an O-ring. Make certain the shoulder in the block is squeaky clean before lubing and installing the O-ring and liner. Make certain you have the correct size O-ring. For what it is worth I always used soap as the lubricant as oil often causes swelling and makes the installation difficult. Don't get hammer happy but gently use a dead hammer to gently get the seal started. Hope that helps.

Use the the metal shims and check liner height. Check those new liners too, know of a shop that used CTP liners on a 3408 and two of the eight were egged shaped and wouldnt fit in the block.

All the 3412/6 and 3516/8 engine I have built we would put the seal rings in a tin full of oil then install immediately (one at a time) as the oil will swell the rubber to help seal once installed, normally have some push back out of liner but we would hold them in with 2 bolts and washers to keep in place, I would suggest check how far from from bottom seat to make sure no issue, only rubber fighting you is normal,

I hope this helps?

Does the shim under the top of the liner flange actually provide a seal or is that the job of the head gasket? I think I might be think about this wrong. Can coolant technically get past the shim and around the flange only to be stopped by the head gasket?

the oring is the seal. the shims sets the liner height.

What o-ring?  I realize the 3 o-rings at the bottom keep the coolant out of the oil but what seals the top of the liner?

the shims set the liner protrusion so it mates properly with the head gasket and thus the head. well thats my understanding anyway

Hi Alex,
Here is a photo of the old liner i pulled from my d315 showwing where things go.

Do not to forget to set the liner hiight this is done by placing the copper washer under liner top then place the liner in the block (no orings yet) an place a bar across the liner top and measure the clearance between the bar and block, i dont have the specs so i call on OM do you have them please and the diagram on the setup please.

Once you have them all within spec you can then install them with the orings on.

 

Regards

 

This is for the 4-3/4" bore but most of the specs apply.