W126, BENZ AID - COMMON QUESTIONS AND ANSWERS

'81 240 D, green vacuum line question

Used Mercedessource repair manuals and vacuum pump to find vacuum loss on green line going into firewall. Comment in manual suggests this is vacuum line to Climate Control. Not sure this car ('81 240D) has climate control.

Pulled instrument cluster and could see vac line going into upper center of dash. What does it connect to and where would I find it? I hate to start pulling the dash only to find it was a simple repair if I had just known where to look...

Thanks!

TC

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

86 190D Injector knocking/nailing

I've got a non-turbo 190D, 1986, 255k, that was running well. I had some small leaks on the top of the injector pump, so I replaced the orings/seals. After reassembling it, I had a major Knock at just above idle to 1500 or so, and no power/more smoke, as well as an "up and down" idle. I then pulled all the injectors, cleaned them, pressure tested(all from 1600 to 1700), and put a new monark nozzle in #3.
This didn't solve anything, knock is still there, maybe slightly worse.
I've replaced both fuel filters. I've run diesel purge through the system, which does quiet it down. But it comes back when on the main system.
Any ideas where to go from here? Should I replace the knozzles? Could I have messed up the delivery valve seal setup(not sure how, but).

Chassis Model Number

W201

Forums

Diesel Engine Specific Aid

300D Leaking Valve Cover Gasket

I have completed a valve adjustment and replaced the valve cover gasket. After running the car, oil can be seem around the edge of the gasket where it meets the engine block. The bolts are tight and I donot understand why there is a leak. The gasket was obtained from a OEM operation. Should I get a gasket from the dealer? Have other people experience this problem?

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

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