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1985 300DT: changed oil, upset vacuum connection
I did my first oil change on my own for this car, and I think I did the steps as suggested by various people on this forum, using dieselgiant as my main guide. While taking off the canister cover, I tried to make doubly extra careful not to disturb any of the connections, especially on the driver's side of the canister.
But alas, while struggling to get it off, one of them did disconnect. Right next to the driver's side bolt there are three wires bundled together, a red one, a green one, and one that connects to a whitish plastic thing. It was the latter one that disconnected, but I put it back together immediately. I hoped everything would be fine. Then after finishing the oil change I went out for a test drive, and everything felt smooth, the engine, the shifting, the starting, the door locks... I stopped the car to clear the garage, and started it up again to park it inside, and for some reason, the shifting was harder than it had ever been. Going from park to reverse, and from reverse to drive-- both were so hard the car lurched backward (or forward). Could this be because of the problem with disconnection I had while changing oil? I checked and checked and nothing else looks like it came loose. Is there something I forgot to do? Edit: Also, when I shut the car off, key at position 1 (or is it 0? whatever the lowest position is), I hear a humming in the rear of the car that goes on for several seconds. It eventually stops. Is this a related problem?
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1985 300d Turbo, 274k miles my first and only car |
#2
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Humming equals radio antenna retracting.
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NC Benz Fuquay-Varina, NC 1979 300D 1983 300D Turbo 260,000 Miles 1984 300D Turbo 345,000 Miles (sons car) OBK #31 1998 Ford Expedition 5.4l (fer Haulin'!) 145,000 1973 19' SeaRay with 115 Mercury TOWER OF POWER! Club Car Golf Cart 36V Ex toys: 1967 Mustang 289 (First Car) Fiat 124TC 1975 Honda CVCC 1980 Audi 5000 Turbo |
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TMAllison said:
Quote:
I looked and looked and still found nothing else. I'm aware of these vacuum diagrams, but I don't quite understand them. I'm a very visual person, and these diagrams don't really match up with what I see when I look at my car.
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1985 300d Turbo, 274k miles my first and only car |
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Actually, the radio antenna only works manually now (the PO is a Bosch-certified technician and decided it wasn't worth the trouble to keep it automatically controlled). Could that still be the cause of the humming? I never heard it prior to tonight.
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1985 300d Turbo, 274k miles my first and only car |
#5
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The last two oil changes that I have done I wound up pulling the vacuum line off the transmission modulator. You may want to check that connection. Drivers side of the transmission, green plastic gizmo with a vacuum line going to it.
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#6
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Follow-up
I wanted to finalize this thread with two things:
After reconnecting the vacuum connections that came loose, I felt some jerkiness in the transmission. But this was temporary. Somehow it righted itself after driving around a few times. I assume there is no leak anymore. The humming I was hearing was the antenna. I just had to turn the switch off.
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1985 300d Turbo, 274k miles my first and only car |
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