The Reason for CAT's Exhaust Sleeves

That's great........now how about not having them made by the lowest bidder so they can come apart and ruin 2 perfectly good turbo's.

 

you can ask the same about almost every Cat part, block, head, liners, injectors etc.

 

Well I can't say I agree since the last 11 trucks we've owned 10 have been Cat powered and we haven't had any major parts failure......except the only Cummins in the fleet which due to an injector failure melted a piston. And thanks to Cummins for switching the design of the N14, one melted piston translated into a new head and all 6 pistons/liners at 250k. I can't say I'm happy about a $13 sleeve killing two turbos but on the bright side both Acert turbos were still cheaper than one VGT and still ran surprisingly good considering the loss of boost pressure!

 

well the 1st issue i see is that they made the sleeve out of stainless steel, um i think that they should have used something like cast steel, as SS gets fatigued quickly when cooled and heated over and over causing fatiuge cracks.

 

stainless is the best insulator, that's why they use it.

 

What year did they start putting on those exhaust sleeves in CAT's ?

 

I think it actually started in the late 80's with the 5KJ 3406C engines with the round port heads and the B-Model square port manifold. The sleeve part number is 194-8124 and is listed as 17 in the picture