Hey Guys,

Forgive me if this information is buried within the Forum, I need quick information because my garage floor is covered with tools and parts.

I was given a video for the valve adjustment for a 1985 300SD. It is very comprehensive. And yet, I am stymied. I am unable to place a 27mm socket on the vibration damper in order to turn the crankshaft to find Top Dead Center. The radiator shroud is in the way. I could take off the fan, but that would slack up the belts and besides I hate twisting wrenches around the open face of a radiator anyway.

Is using a starter button bad form? Will using the starter to achieve TDC chip up the bendix or the flywheel. My diesel starts very easily, so I will probably have to remove one or more glow plugs to avoid unintended starting, yes?

Somebody knows what to do.

Thank You,

Joe Marroso

Not quite sure why you can't get to it... although it probably would require an stubby extension of just the right length. You don't need to touch the belts to get the fan off, btw.

You can unplug the GP relay to prevent starting. Assuming it's not warmed up or anything.

However, I don't think you can get the cam lobes exactly where you want them to be by just bumping the starter.

Another alternative is using the power steering bolt to turn (might need to tighten the belt). However, this can result in the steering pulley being impossible to remove, if you ever plan on doing so.

I use one of those bump starter things, have yet for the engine to start, you're just barley turning the engine, but if it makes you feel better, press on the shut off lever, or pull vac on the line.

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83 SD

84 CD

I use a box wrench on the PS pully nut. If the belt slips, put some hand pressure on it to give it some traction, it works for me. Also, engine cold, turn clockwise.

I just did my 85 300SD last week. I could not believe it was the same car after I was done . I use the info off dieselgiant.com . I think starting it to move it would not work very well . That just my thought . Good luck

Use a closed end, 22mm wrench on the power steering nut. Make sure all your belts are tight.

I just did the valves on a friends 84 300D today, and the PS nut worked fine. Have fun.

If you need any pictures, check out http://dieselgiant.com/valveadjustment.htm

I had one start on me by just bumping it. What a mess. After that I always used the PS nut since it was too big a PITA to turn it by the crank bolt. I've suggested using the PS nut many years ago in one of these kind of threads.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

I don't understand. Are you using a deep socket? Are you accessing from below?

Using 1/2" drive ratchet, 3" extension & 27mm deep socket and the length is a perfect fit between the shroud and pulley. (BTW, 4 strokes brings the next cam lobe to perfect position.) Using the FSM method sure saves on the back by giving you a break between adjustments/measurements.

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Sam

84 300SD 350K+ miles ( Blue Belle )

OUCH, that would be a mess.
You have a very strong engine, mine apparently not so much.

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83 SD

84 CD

Same here, mine started bumping it by the starter, sure gets a paniky feeling when it does . grabbed the rod behing the IP and pulled up quickly, but not before oil started to run down the side of the engine.

PS pump works juuust fine.

there was a thread couple weeks ago where a guy had the bolts brake off for the crank pully. one thing brought up was if the belts are too tight it can put too much strain on the bolts, Alternator bearings, PS shaft etc...

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Gentlemen,

My spring valve adjustment is not going so well. I have 3 valves that "spin" while I turn the jamnut. I have gone through the website and this problem is not uncommon. It was suggested to jam a flat screwdriver somewhere, I am not sure where, to prevent this from happening. There is also a reference to a "3rd" wrench that attaches to the valve and prevents this spinning.

I don't want to use blunt instruments that might leave a nick on the valve stem or compromise the overall operation.

I did the first 7 valves very easily. What do I do now?

Joe Marroso

I find that extremely hard to believe, on a cold engine. When I adjusted the valves with the bump starter, I was turning the engine maybe 1/8 of a revolution at a time and I can't see how the engine can start. How many revolutions were you spinning the motor?

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

I barely bumped mine over that time but I had started it previously to drive it inside the garage.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

First, you are supposed to have the ' OFF ' lever wired to OFF...

Second, the FSM specifically forbids using the Power Steering pulley nut to turn the engine... that pulley is a tapered shaft and you can make a real mess of it by not following the FSM...

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html