Medium and Heavy Trucks
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Hi Aaron, My name is***** will be glad to help. Cat offers a thinner spacer plate. Do you know the part number and thickness of the current spacer plate you have? Let me know
Something is not adding up here. Was the deck planed or counter-bored and shimmed? If planed there is no reason why a new liner should be showing low. How are you measuring your liner protrusion?
Double check the liner part numbers to see if maybe they gave you the wrong liners or spacer plate...
The thinner spacer plate is(###) ###-####this plate is .003" thinner than the standard plate at. The only way you can use this plate is if all the liners are within .002" adjacent to each other and the overall measurements from one end of the block to the other end, the projection is less than .003" with the standard plate. If you have one cylinder at .0035 and the two cylinders adjacent are .0025 when you install the thinner plate the measurements would raise the liner projection to .0065 with the two adjacent cylinders being .0055. You'd be taking a risk of cracking the liner flange on the .0065 cylinder at a later time even though it's within the .002" spec of the liners next to it.
Use the thinner plate only if the liner is above the max of .006". A high liner projection means that the head is exerting more downward pressure on the flange/liner which can result in cracked or bro***** *****ner flanges.
It is true that counterboring and shimming is required to bring the tolerances into specs. I am assuming you have the bulletin with head gasket procedure for this?
Thanks for the update. Click this link for the full procedure for all 3400 series engines. It also covers the liner flange thicknesses.