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post #1 of 3 (permalink) Old 02-26-2012, 09:28 AM Thread Starter
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Date registered: Feb 2012
Vehicle: 1975 mercedes 300d very straight car, rust free, runs drives good
Location: Everson Washington
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new mercedes owner

My wife and I have bought a 75 mercedes 300d. I have been fixing some of the floor rust, I think it will be ok. Just wondering if any have owned these diesels for a long time, how do the injectors and injector pumps hold out? The car seems like it has been maintained ok, has 238k. The transmission seems good, just shifts late.

thanks in advance, Vance
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post #2 of 3 (permalink) Old 02-26-2012, 10:02 PM
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Hi Vance!

I own a ponton and a 115, both diesels. The ponton is over 50 years old with all original equipment, including the injection pump. Haven't had problems with the injecion pump and injectors for both cars though I've owned both for about 6 years now. The ponton belonged to a friend's dad who bought it from the first owner way back in '61. The only problem for both cars was rust but the engines haven't given me any trouble at all. I read in another forum that it would take a lot to destroy these injection pumps. As long as these are properly lubricated, they could outlast the engine.
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post #3 of 3 (permalink) Old 02-27-2012, 03:51 AM
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The injection pump usually lasts several engines. Injectors tend to clog up, so checking/overhauling them every 100,000 miles or so is advisable.

The transmission is controlled by a rod from the gas linkage. The proper adjustment is in the FSM. First start by replacing the oil and filter of the transmission.
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