A friend of mine wants to turbo a 1968 D4D with a D330C motor and Cat dealer can't find a turbo assem. number for a D330C engine. There is a turbo assem. number in my 1965 78A parts book for a D330 engine. Could anyone help with a number for his D330C Thanks David

David - Before your friend commences his upgrade to a turbo, I trust that he's aware that oil-cooled pistons are a necessity for a turboed engine .. and if his engine is not already fitted with them, he would be well advised to fit them.

Additionally, increased fuelling adjustments need to be made to take full advantage of the extra air .. with possibly bigger injectors.

I'll see what I can find in the engine specs microfiche as to turbo numbers fitted to the turbo engines.
Be aware that governor springs are often changed with turbo engines, and also, that increased water and oil cooling may be required, if cooling is already marginal.

5L7660 Exhaust elbow
7s5739 turbo
6L3052 pipe
2S1541 orifice (spray oil on pistons)

from D330C industrial 4B1-up

The blocks are all drilled out for installing the tubes but if they are not needed in the case of a natural aspirated engine then there is a blank plug in them so when the turbo is used then the tubes are part of the block.The crank usually has to be removed to get the plugs out then the spray tubes are driven down from the top side of the block bearing bores.Parts books for both style engines will need to be gone over to compare parts & what needs changing for the turbo setup.It,s not just a job of slapping the turbo & manifold on from the outside but needs some serious checking of everything involved so down the road you don,t get in trouble.

Thank you guys for the good info I'll pass it along to Pete. Thanks David:)