cm2350 turbo

[Unilevers]

go hammer!

the fire ring grooves are cut into the tops of the liners. the factory head gasket has the oem fire rings removed and the crush is measured, i have pics around here somewhere. its a factory head so it takes the place of the oem fire ring just has alot more crush and is made out of sterner stuff. i had stainless counterbore and liner shims made for it aswell. liner height sits at 18 thou. the liners are ductile steel liners in the big one.

the induction treating was done in southern cali. i didnt cryo treat them either because at the first sign of shitting the bed its getting billet rods anyways. i probably shoulda done the crank but meh cant win em all.

my cryo guy in edmonton is top notch. i did the head bolts and torque the head in very small steps and once i get to the factory spec i went another 90 degrees. i wanted to go more but the threads in the block are in shitty spots and i though i would pull some threads upward and distort the crush on the fire rings. holding the gasket is all about how much clamping force you can get and maintain without stretch or heat distortion.

after the head was on it sat for 24 hrs and got checked again. after it was assembled it was checked on the center ones again. and after its first load or 2 it was checked again on the ones i could reach. none have loosened at all.

90+ psi no problems, but this setup has ball bearing compounds.

you can do the fire ringing to a stock truck for maybe a extra 1500 bucks, i would do it if it was mine.

edit - fire rings were done at a custom machine shop in wisconsin. friend of mine he does all the machining stuff for the big diesel pull trucks etc.