311 liner height

gday can anybody help me with the piston liner protrusion specs for a 311 engine in 112 grader s/no s9t56

here is a few Cat articles on the subject--general protrusion for early engines was given as 0.001" to 0.005" with a maximum difference between any two cylinders as 0.002"

Hope these help--

Eddie B.

This page from a 3306 engine manual describes how to properly measure liner protrusion--a depth mic. or careful use of a digital vernier caliper at a pinch can be used as these were the tools before Cat came out with the gauge shown.

Eddie B.

S9T0056 ( Steelweld 212 built in Australia under License) is equivalent of a 9T4092 so look for manuals for the American 9t grader for their manuals.

Eddie B.

I have always measured liner height with a small engineers square and a feeler gauge. I made a tool to hold a dial indicator like in the picture but someone wanted it more than me so back to the old way of doing it.

thanks my heights fall within those specs I'm having trouble with number 4 cylinder pressurizing the cooling system i was sure it was a liner height issue i just done new liners and rings on this engine I've also had the precon chamber seats machined thinking it may not be seating rite there doesn't appear to be any cracks in cylinder head I'm slowly running out of options

I had similar issues with a D 318. I had a very talented machinist that could of built tooling to dress the pre combustion chamber sets, but did not want to. He had me try real copper washers as the gasket. He had box of different sizes from McMaster-Carr We picked the size that fit and I ordered more. Solved my problem. I had new washer from Cat. Had nice copper look, copper would starch off to reveal steel base with copper paint on the Cat ones from 20 years ago. Just another thing to try, before pulling your last hair out.

thanks for that I will check the washers I tried swapping a chamber from one of the cylinders that are not pressurizing cooling system and the problem is staying in number 4 cylinder .