3400 G engine

If I were doing it first drop the liner in each bore without the seals & but with the copper shim on & check the liner height above the block with some pressure against & it should be not less than .002" and up to maybe 006" and also see if the bores in the top of block are smooth & not burned in areas from fire getting under the liner at some time.Also don,t use grease on the seals on installing but at the dealer we always used white Lubra-Plate but guys on here have used waterless hand soap but I never did.You need to also lube the bottom bores where the seals go in & it will take some pressure to press them down in so even a block of wood & heavy hammer will set them down in but a bar of steel & span across two studs & draw them down is the way we did it at the shop & Cat later came out with a press tool to set them down in.Should be easy once you get the knack of it. The liner should be above the block with the specs. I gave you & not below.

Thanks SJ that is what i needed to know. The last i worked on a Cat was the frist 3208 and 3406.
I did not know if i had to check the height of the liners. I have a son that is a over the road truck mec. so will see if i can get him to come up and check the heights for me.
catrat

SJ can you tell me what the bearing specks is on this engine. when i start on the rods and bearings i will plastguage them what should i look for on clearence. Buy some od chance it appears this crank is standard. 2.18 i think my friend said was size.
thanks
catrat
R Fink😊

I don,t have any specs on the gas job but the D3400 is 2.750" for the mains & the clearance is .006" to .0085" with a max of .015" & the rods are 2.625" .0055" to.008" clearance with max of .013" & the rod torque is 58 lbs. & the mains are 90 lbs.Tighten them to the torque & advance to the next cotter pin hole if it doesn,t line up but don,t loosen to get the hole lined up.