W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

Stripped valve locking nut 1983 300D - Now what???

Hi all; Was doing my first valve adjustment and am convinced that the #6 valve has a stripped lock nut. I'm concerned that the valve stem itself is stripped, but when I tighten down the top (adjusting) nut, the locking nut just glides with it, and I CAN get a ton of clearance for the rocker arm. What's involved in changing the locking nuts? Do you have to remove the cam, etc? I know that either (or both) the threaded valve stem or the nuts can strip. Typically, does the nut give out first? Hoping to hear that I don't need to pull the cylinder head.

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Diesel Engine Specific Aid

Sporadic oil pressure needle

!985 300CTD;150,000miles. During a 7 hr trip at highway speed the oil pressure indicator needle stays at a constant "3". When reducing speed & coming to a stop or idling the needle bounces (is not steady) at just under "2" & a "thumping/knocking" sound comes from the gauge area but is not heard when the engine rev's up. The engine runs quite well & pulls strong. The oil/filter was just changed & I have used synthetic diesel 15w-40 in the vehicle for the past two oil changes@5000 miles per.

Chassis Model Number

W123

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Diesel Engine Specific Aid

Putting gas in a diesel - What happens?

Hi there. Just was curious about what exactly would happen if someone filled a diesel cars tank with normal gasoline. I know this is a bad idea. I'd NEVER do it, of course. Just was wondering what the effect would be. It's bound to have happened by accident at a full service station to someone. Would it start? Run? Explode? Would this make for a fun filled, exciting episode of "Master Blasters"??? Anyway, was just wondering and hoped someone would know. Thanks so much... NSA - Hazleton, Pennsylvania, U.S.A.

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Diesel Engine Specific Aid

1980 450sl heater / ac problems

I have a 1980 450sl and just replaced water pump thermostat and servo unit and catilytic converter and left and right side pipes. Runs gr8 but when i turn on a/c it starts out ice cold working well and blowing fine, but after about 5 to 10 mins it starts to blow heat. wondering if you might can tell me what to look for. tks MCTurner

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Body and Interior Specific Aid

Taxonomy upgrade extras

Questions and Answers

Chassis Model Number

R107

83 300TDT non start

I was tyring to track a problem with slow engine shut-off and have solved the problem so completely that the engine is now totally stopped. While running my car with the shut off valve actuator disconnected from vacuum, a gauge on the line that supplies vacuum to that actuator and the ignition shut off to measure vacuum supplied to the actuator, the car slowly built to about -5lbs before the car rattled to a stop. The shut off valve actuator was disconnected from vacuum. The car will now crank but is not getting fuel (apparently). I have verified that there is no fuel at the return line when car cranks, no fuel moving in the prefilter. I have removed and checked the shut off actuator and shut off linkage. They are all moving freely and properly.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1984 300D 123 Rear Axle Flange Removal How?

I have a 1984 300D 123 chas that I was replacing the rear Axles on. I ran into a problem. I did a rush job while trying to take the right rear axle out. I took the tire off, then removed the 13mm long screw from the center of the hub, then I messed up when I tried knocking the Axle Shaft out with a crow bar. The curved crow bar banged into the grooves of the Axle Shaft Flange. So when i try to put the new axle on it wont go, because I destroyed the grooves.

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Body and Interior Specific Aid

Taxonomy upgrade extras

Instructions

Chassis Model Number

W123

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