Cylinder liner sealing

[Gordon]

What should be used to seal a cylinder liner in a cylinder? I have a liner made from DOM tubing in a steel cylinder. It has holes in the side for intake/exhaust/plug. I put it in using JB Weld and it is leaking around the spark plug hole. I am sure that when it is inserted it scrapes off most of the JB Weld. It is a rather tight fit in the cylinder. It is not a press fit but required some tapping to get it in place. Something like epoxy would probably flow better but that probably would not take the heat. The alternative is to remake it in one piece.

 

[Charles Lamont]

Because JB Weld is viscous and has a filler I don't think I would use it for a tight fit. Loctite of the right grade would most likely be better, such as 620 or 638. Is there any cooling?

 

[Gordon]

No cooling. I have not been able to get this thing to run long enough for it to get hot.

I think that I am leaking around the spark plug hole but I cannot verify that. I have put compressed air at 20 psi into the spark plug hole but cannot find any leak. Next step may be to remake the whole thing as one piece.