W126, BENZ AID - COMMON QUESTIONS AND ANSWERS

82 240d smoking bad (IMO)

I recently did a valve adjustment, hoping that the minor exhaust smoke would go away. It got worse. The engine smokes on startup, smokes really bad and runs rough until it is warm, then smokes enough to be annoying at idle. It appears to be oil smoke. I tested compression, wet and dry, and that was fine (dry-330, 340,340,335). According to previous owner's meticulous records, the engine was overhauled at 515K, am at 565K now. Any insight would be appreciated!!

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1980 300D over charging battery

I have a 1980 300d and my alternater is over charging. Its between 13.5 and 16v. I was told this could be as simple as it not being grounded. I fear it may be the alternater. Being that I am broke...the ground would be the best problem for me. I was wondering if the alternators in these cars had a seperate regulator or if it was built in and if there were any things I could look for before i spend the money on a new alternator.

Thanks guys

Brent

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1985 300td vac pump caged bearing?

Hello, Kent. I have done a lot of work with your great parts and books. I was rebuilding my vacuum pump and wondered if it wouldn't be a better idea to rebuild a used one that has the trapped bearings on the piston actuator (don't know the actual terminology here). I'm concerned about the old bearings in mine and the possiblity that they could drop into my timing chain. They feel a little growly when I turn them. Do you have any used pumps with this bearing?

-Jeb Fowler

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85 300SD Aux Fan will not turn on when pressure is high

I have been experiencing a couple of problems with the AC. One was the compressor clutch "cooked itself" resulting in it being replaced. After it was replaced I noticed the aux fan was not ever coming on and the clutch still has moments where it is not completely engaging and is partially engaged resulting in it heating up. I have troubleshot the aux fan down to the resistor used for a slower aux fan speed. It appears to be open and should be replaced. Could the failing of the aux fan cause the slipping of the clutch and how difficult is it to replace the resistor?

Thanks

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