BENZ AID - COMMON QUESTIONS AND ANSWERS

1983 300d rough idle, no power

I have a 1983 300d with 155k miles on the engine. I have a rough idle issue and no power on take off. slow as a old dog. I have replaced all diesel filters. in tank screen also. I replaced motor mounts and shocks. performed diesel purge, got lil better, but still same issue. Performed valve adjustment, checked cam lobes, ok. performed cold compression test, found 410 to 405 on 1,2,3,4 and 5 cylinders. replaced glow plugs and relay.checked turbo alda, correct and functioning. checked for blockage, found clean and clear. I really dont know what else can be causing this issue. HELP!

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1980 450 SLC Engine Stalling after long run

Hi Folks ,
I recently bought a 450SLC in reasonable condition with a view to restoring.Motor starts fine & goes well.
I took it for a long run a couple of weeks a go & covered about 150kms without incident until I came back to town & stopped at traffic lights. The car started jerking when I took off & started loosing power. I managed to get home with problem slowly getting worse.
I turned the engine off & restarted it a few minutes later & it seemed to be revving cleanly again , but didn't take it out again until a couple of weeks later.

Chassis Model Number

R107

Forums

Gas Engine Specific Aid

84 300d turbo Valve adjustment and compression test

Two quick questions. I am about to adjust the valves (5cyl 617) to do a compression test on an engine that has not been turned in a couple of years. I just took the valve cover off and everything looks as it should. No sign of corrosion anywhere, oil still present on surfaces.

Should I put oil down the cylinders prior to turning for valve adjustment?

How much in each cylinder?

Thanks

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

88 190d shut off lever staying down/ hard start

After I drive my 190D and shut It off,I noticed it has a hard time to restart sometimes.It has been like this for awhile now.After checking things out, I found that the stop lever on the injection pump stays down and takes a long time to come back up.Would this be a fault in the shut off valve?If i have someone hold the lever up the car starts right up.What would cause this to do that?

Chassis Model Number

W201

Forums

Diesel Engine Specific Aid

After installing new motor mounts, transmission vibrating on cross piece

I installed all three new motor mounts on my 1979 300SD W116, the engine did not line up very well while putting in new front mounts, prying the engine was necessary. The rear mount was a snap, however, I had to pry the bell housing from the cross member to get it to avoid vibration while underway, going in reverse up hill was very loud. The engine/transmission is settling back on the cross member. Any ideas?

The chassis has about 340k miles on it and the engine was rebuilt about 85k miles ago by the previous owner. I can say that the rubber under the car is warn.

Chassis Model Number

W116

Forums

Diesel Engine Specific Aid

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