Diesel Engine Specific Aid

1978 300 D Cracked head?

The 78 300 D that i rescued from the crusher about 30 thousand miles ago ran hot recently. The driver told me it just steamed up...started knocking and died. (she was not paying attention to gauges).

the water pump had gone south...no water left in system.

installed a new pump. it fires up easily. runs..no bad noises. bo big smoke. no water in oil...But it starts to miss when it heats up and the radiator cap is on. pop the cap and relieve the pressure it smoothes out.

Im thinking it has a cracked head or block and the pressure is forcing steam into a cylinder(s). anyone have any ideas on that. makes sense to me...
but i have never dealt with this type problem before.

anyone ever have any luck with block sealers they sell over the counter.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1980 300D Ben Alternator Bracket

I bent the forked portion of the atlernator brakcet that the adjustment bolt passes through and was wondering if bending it back into place is an option or if I should just buy another. I don't relish the idea of dropping a hundred plus dollars on a new/used one of these; would like to salvage what I have if it can be done.

Thanks for the help!

Collin

Chassis Model Number

W123

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Diesel Engine Specific Aid

1984 300TD crank/no start

I just bought this car. Auto trans. Sat for 6 months. 150k miles. Just replaced battery and fuel filters. I read other posts. Glow plugs read starting from front(#1 10.7v,#2 10.8v, #3 10.9v, #410.9v, #5 11v). Loosened one injector line and fuel was coming from it.

Seems that I have fuel and power to glow plugs. Its 70 degrees out.

What is next? Comrpression test? Should I buy Physical Exam kit and then adjust valves and do a comrpession test?

Any guesses as to what problem is?

Chassis Model Number

W123

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Diesel Engine Specific Aid

'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

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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

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Diesel Engine Specific Aid

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