07cl733 Posted 10 hours ago Share Posted 10 hours ago Hello all, I'm having a bit of trouble with an etech 460 and would appreciate any input you may have. The number 2 fire ring started leaking compression into the water jacket and number 3 looked to be close behind. Liner protrusion is in spec on all cylinders, but some are at the low end. I've read input from other members that said the 460 HP engines work better with the liners set at the top of the .023 to .029 range. I lost a head gasket under this head 200k miles ago, but on the rear 3 cylinders. I swapped heads front to back at that time and the now rear head looks fine, as it did then. My questions are, could the head be the problem, or are the cylinders just too low? Also, is my only option to raise them to cut the counter bores and shim them up? Did anyone ever produce taller liners for the higher horse engines? Quote Link to comment https://www.bigmacktrucks.com/topic/76513-etech-cylinder-liner-question/ Share on other sites More sharing options...
Joey Mack Posted 1 hour ago Share Posted 1 hour ago In my opinion. .023" is too low. When I set liners i shoot for .027". You are allowed .002" across the cyl's. So .025" would be the low, and .029" would be the high. Are you using a sled gauge to check liner protrusion? And pointing in the correct groove at the top. Is the deck flat? I dont know of taller liners, an uncut counter bore shelf is around 4.003" deep. This is based off of my own measurements . Quote Link to comment https://www.bigmacktrucks.com/topic/76513-etech-cylinder-liner-question/#findComment-593549 Share on other sites More sharing options...
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