BENZ AID - COMMON QUESTIONS AND ANSWERS

SVO 300TD dies while at idle in loop mode

Hello
I have single tank conversion that dies at idle in loop mode but runs fine when under acceleration.
After it dies I have to switch the valve to return and purge the system of what seems to be air then I'm fine until the next time I let it warm up at idle. It doesn't have this problem when the valve is on return. I thought it might be a filter issue but I have no loss of power when going down the road.
Thank you this forum has been a big help.
Rob

Chassis Model Number

W123

Forums

SVO Fuel Conversion Specific Aid

WVO Booster Pump Troubles 1985 300TD

I am having problems getting my WVO system to work. It has worked well for over a year (20,000 miles!), but now only works on diesel. I've traced everything out and found that the booster pump (FRB5) back at the rear tank won't pump WVO. It pumps diesel at 10 gpm but only pumps WVO at about 2 gpm. I replaced the pump with a new pump and it works identically. I removed the pump and tested it on my bench with short hose lengths with clean WVO and diesel running directly off of a battery and it is still the same.

Chassis Model Number

W123

Forums

SVO Fuel Conversion Specific Aid

Engine size for 300SD

Me again. I asked a question about my 1978 300SD with a bad engine. I can get a really great deal on a low mileage 300TD engine and would love the increased power. My dad thinks we can just swap them out as long as they are the same size. Is there a size difference? It is hard to tell by looking and is really hard to measure.
Or should I just keep looking for a nonturbo engine?
(Don"t know how long the turbo engine will be available so please tell me something)

Chassis Model Number

Classic Sedans

Forums

Diesel Engine Specific Aid

Squeek, Squeek, What does a worn water pump sound like?

I have a wonderful Anthracite Grey 1984 300TD - with 290,000 miles on it. Lately, at idle, it has begun to make a little squeek, squeek noise, kinda like a bird chirping from somewhere around the belts. It is slowly growing louder, and sounds to me like a bearing is going out. Is this what a worn out water pump sounds like? It seems to me that is what it is. I suppose it could be a worn out alternator. What are the typical symptoms of a worn water pump?
-Levon-

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

82 300TD brake calipers wont collapse

I was trying to do the simple task of replacing the front brake pads on my '82 300 TD wagon. I was able easily able to get one of the pads out, but the other one, the one closest to the car, I was unable to get out. When I would try to push the current brake pad back into the caliper to make room for the new thicker pad, it seemed like the pad was frozen in place. It would not budge. I tried tapping on it with a hammer, blasting it with dynamite and it would not move. Is there something that I am missing, or does this mean I probably need to get a new set of front calipers?

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

1980's 123 series Clear Coat problems

Short of a re-paint, is there anything that can be done about peeling clear coat? I understand that older 123's had clear coat applied over the paint at the factory. I understand that current paint practice is to mix clear coat with the paint color which supposedly eliminates the peeling problem.

It would be nice if a ....rattle can...solution of clear coat could be applied. Does anyone have experience with this? Any other ideas as to how to fix this problem?

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

560sel ignition coil

Have a 1990 560sel with 127k miles. Want to start changing the oil myself via the dipstick. Other sites say that it's best to disconnect the ignition coil before cranking the engine over after the change. This prevents too much strain on the timing chain. Have a repair CD but the coil is not behind the EZL as shown on the diagram. Looking for the location of the coil. Thanks.

Chassis Model Number

W126

Forums

Body and Interior Specific Aid

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