I have an 83 300CD turbo diesel with 465,000 miles on it. My dad wants to rebuild this other engine that I have that was probably ran out of oil so one of the rods is probably frozen against the block. It's from a W123 300D turbo 1982. My dad wants to put it in my coupe so its faster and it doesnt get in the way.

My question is. Should I rebuild the 83 engine or the 82 engine? Are they the same?

Next question. I heard that you have to sleve every cylinder when you rebuild them, so, assuming that I sleve every cylinder what is the maximum piston diameter that I can use, and what is the factory diameter? What would be recommened so have enough sidewall left? I want to make a bigger bore to make it quicker, because if my dad is going to spend the money on something that he doesnt need to do, might as well have him pay my way into having the fastest 123 around. I want to have more low end torque, and also maybe I can get an intercooler and a different turbo. If anyone has light on the issues, could you shine it my way?

Thanks,

Austin

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Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.