Diesel Engine Specific Aid

heat-shield washer stuck!

76 MB 240D [115]: I've removed the injectors and replaced the nozzles but I can't get the heat-shield washer out of 1 of the chambers. I've applied WD40, 'Liquid Wrench', diesel fuel, and biodiesel in an attempt to lubricate the chamber; I've tried prying the washer out with several instruments [which worked with 1 of the others that was also stuck], but I've only succeeded in mangling the washer itself, which remains stuck to the bottom. Any ideas about cleaning agents to use or other techniques to try?

Chassis Model Number

W115

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Diesel Engine Specific Aid

1979 300D convert to Turbo?

My 1979 300D is still painfully slow and runs a little rough even after the valve adjustment, purge, injector rebuild and fresh oil and fuel filters all the way around. Is it possible to retrofit an entire turbo assembly with the intake and exhaust manifold (like the used one for sale on this site) on this non-turbo 3.0 engine? Isn't it the same block and manifold? I'm sure someone has had this idea before but I can't find it on any blogs. Thanks

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Chassis Model Number

W123

85 300d Injector Nailing

Kent, I am having trouble with one of my five injectors nailing. Could you lend some advice? History: I sold my 82 and bought an 85 with less miles. I noticed that it was running a little rough and was smoking pretty bad. I figured that this would probably be cured easily so I brought it in and did some services on it including valve adjustment, diesel purge, cleaned the ALDA lines, and ran some 85 plus in the fuel. It continued to smoke (though not as bad) so I thought next that it was probably the injector tips so I bought the injector tips from you and followed your instructions on how to replace them and clean the injectors. I reinstalled them and no dice, still smoking and it was then that I noticed the nailing (I cannot remember if it was doing this before. It’s possible).

Chassis Model Number

W123

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81 300D Big valve stem mistake

Kent, OK, I know I could have completely avoided this problem if I had only been using your instructions. But (& it always starts that way) I had replaced 2 sets of valve stem seals in the past 6 months using your instructions & I thought I knew the steps. Yup, the one biggest warning you give was what I did: removed the nuts on a stem & it dropped down. The cam is in the 1 o'clock position & the stem is about 3/4" from the surface.

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Chassis Model Number

W123

300SD Cruise pulses to beat of blinkers

1984 330SD I have noticed that when I run with cruise on it behaves perfectly. However, if I signal a lane change with the cruise on the cruise control "pulses" the enginge speed exactly to the rythm of the turn signal. I can only assume electric but I am not sure as I am still learning MB behavior. It is kinda' funny actaully but is annoying (it is not voilent but it is like someone lifting the pedal and re-applying it) Thoughts? Doug in TX

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Chassis Model Number

W126

300SD - Ok Just what brakes do I have?

I have an 84 300SD (126) and have a question. My shop that is helping me with my car said that my brakes work great (and they do) but the pads are worn. I have read here and in other helpful forums that it can be hard to tell whick brakes your car has (ATE,Bendix etc). Is there a way I can tell what brakes I have so I can order the right replacement pads. I am all fired up now and want to do that on my own also. Thanks in advance guys, Doug in Dallas P.S. I got the new primer pump and it was a super easy install. It works really great and does not leak. Thanks again for that.

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Chassis Model Number

W126

84 300SD slightly rough idle with minor smoke from exhaust

Hey there. Quickly I have an 84 300SD. It is in VERY good condition, everything works (kinda scarry) AC,cruise,acutmatic climate control, I mean it is in really excelelnt shape all the way around. 139k miles and I bought it a few months back. I have done your diesel purge, paid a very reputable shop to do a vavle adjustment and they replaced a vacuum pot that was causing a little shifting gremlin. Anyway all is fine except that a new glitch has occured. I started the car the other day and the idle was a bit rough. Nothing earth ratteling but I also noticed that there is a little smoke coming form the exhaust and ther used to be quite literally none that you could see.

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Chassis Model Number

W126

78 300D lost power on highway and stalled, now wont start

I was recently driving down the highway when my 300D seemed to be starving for fuel. It had the usual symptoms, sudden loss of power, no engine response when I hit the gas. So I coasted over to the side of the road and as soon as I stopped, the engine shut off. Now my car won't start. I replaced both fuel filters a week before and have since replaced the glow plugs and still to no avail. I have checked the voltage at each plug and all 5 have power, the engine is getting fuel (although I don't know if it's getting enough) but it just cranks and won't fire.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1985 300TD hood hinge replacement

my hood hinges on 85 300 td wagon got all bent...on one side the hole in the engine compartment that the hinge connects to rusted out...can i just change one side...trying to do this and having a hard time replacing the 13 mm bolt that goes through the hinge into the body of the car can't get a socket wrench in there and can't get enough pressure putting the bolt into the hole to get the threads started...am i making any sense? any recommendations??? thanks for reading...

Chassis Model Number

W123

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