Diesel Engine Specific Aid

1982 300D Failing to start, dash lights dim and clicking sound

Interesting set of events this weekend: car would not start, clicking sound, so I jumped started the 300D and took it for a drive; when I returned, I shut off and tried to start again; nothing, so I tried to jump start again, nothing, only clicking sound.

I tested the fan blower, windshield wipers, radio, and electric windows, and all worked; however, when I turned the key to start, all lights on dash went off, and the clicking noise persisted until a few moments later; then lights came on but no start;

Chassis Model Number

W123

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Diesel Engine Specific Aid

1978 300D AC belts missing

Test drove the subject vehicle today. Looking into the engine compartment, noticed the AC belt or belts were missing. Owner says, previous owner removed them during the winter and never replaced them.

In my quest to own an 300D, just about every 300D/240D I have checked into - the AC is inoperative. Why is this just about always the case? Why are the belts missing... Is this an expensive repair or just a recharge?

Thanks again.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1984 330D New Monarks

Hi all at Mercedessource and forum. I put the Monark injectors in "Old Yella today. The instructions were great as usual and every thing went smooth. I had one minor disappointment and one question and would like a little advice on both. First the disappointment: You know how you get a little diesel fuel around the pre-chamber and the wells that the injectors sit in as you expell the air from the hard lines with the nuts cracked a 1/4 to a 1/2 turn? Okay, well I did everything to a tee. I torqued all the injectors at 59 ft/lbs.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1980 240d alternator troubleshoot

car wouldn't start, pulled voltage regulator, inner brush was worn out, while outer was over 1/4 inch. both were worn with same concave profile. does this spell alternator trouble?
i installed a borrowed voltage regulator, and all seemed ok first day. now, at idle, if i turn the lights on, it changes pitch of the engine. the engine bay is clean, and alternator looks newer even though the car has way over 300k.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1991 300D Non-Return Valve / Booster Vacuum Line

In changing the serpentine belt I pulled at a line and broke the non-return valve in the middle of the main brake booster vacuum line. My car won't stop now and it's slightly important to do so because I have to get this car inspected for a state safety inspection. I'm thinking they won't look too kindly on a car that doesn't stop ;)

From the schematics, this is the brown plastic line that gets the vacuum when the key is shut off -- so everything adds up. I'm trying to find a quick fix as I wait on parts.

#1: I haven't been able to find just the valve, I think the line has to be replaced entirely?

#2: Is this as simple as unscrewing and reconnecting from the pump to the booster? Since there isn't fluid/anything else to deal with I wanted to make sure I don't neglect anything.

Chassis Model Number

W124

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Diesel Engine Specific Aid

Injector Nozzle Replacement; stuck injector bodies/shims

Hi All,

Used Kent's handy manual/kit for the Monark Injector Nozzle swap. Am in the
middle of the job... two of the injector nozzle bodies don't seem to want
to come out (the other 4 came out pretty easily). Ditto for several of the
shims... some blew-out with a little blast of air/solvent... the others
are sitting tight.

Any suggestions? I've tried "liquid wrench" on the nozzle bodies... so far
no luck.

I was surprised that one of the nozzles was way more rusty than the others;
also, if any of you are contemplating/preparing for this job, I'll save
you the puzzlement: sometimes the crush washers/heat shields come out with
the injector body... so you don't have to sit there scratching your head,
wondering why some are longer than others... Doh!

Cheers.

Bill M.

Chassis Model Number

W126

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Diesel Engine Specific Aid

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