What about for a 300D turbo?

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Originally Posted by ForcedInduction View Post
1: The vacuum pump is continuously pumping air out of the vacuum system and into the crankcase.

I thought the vacuum pump's exhaust in most diesel vehicle is normally discharged into the atmosphere. What purpose does it serve to discharge into the crankcase and increasing the psi?

__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

A 240 has higher rear end gearing. It would tend to accumulate more wear at simular milage to a 300d. Far greater piston travel for example. Also it is operating at a higher rpm on average under the same driving conditions as a 300d.
So a little more blowby might be present because of these factors alone causing additional wear. Yet the lesser genertal stress under that gearing may average things out for all I know. I would still think the primary determination would be the frequency of oil changes. Plus the total milage accumulated iin comparison to the 300d is still going to be the principal factor.
Most 240ds are pushed pretty hard in comparison to the 300ds in my opinion. Especially with todays speed limits on the highway. I still would like to have one with a five speed transmission.

That is the turbo's compression ratio.

Probably because it eliminates the need for a filter and/or additional tubing.