Why wont my diesel turn off?
The number one reason for your diesel engine suddenly failing to shut off is loss of vacuum to the fuel injection pump shut-off valve. And the number one reason for sudden loss of vacuum is a leak somewhere in the lines.
When did the Mercedes 240D diesel go on sale?
Suddenly, they’ll be hot commodities again, selling for handsome prices, and the mechanics who know how to keep them clattering will be busy again. I’ve seen this happen a few times in my life: the first boom in 1974, when this W123’s predecessors and Peugeot 504 diesels were the ticket in Southern California.
Where does the vacuum go on a Mercedes 300D?
In all Mercedes diesel engines from the first 300D in 1975 up to the mid 1990’s, vacuum (suction) is used to turn the engine off – not electricity! In simple terms – there is a valve mounted on the rear or side of the diesel fuel injection pump. This valve has an arm attached to it that goes down inside the pump.
How does a Mercedes diesel engine shut off?
Proper diagnosis is a must! On older Mercedes diesel engines models: 1975 to 1976 115 chassis 300D, all 123, 126, 201 and 124 chassis diesels from 1977 to 1993 the engine shutoff is controlled by vacuum (not electrical). An engine driven pump supplies vacuum to the system and a vacuum operated shutoff valve shuts fuel off inside the injection pump.
Are there any problems with an older Mercedes?
Unknown battery drain, electrical shorts, blown fuses – these can be difficult to isolate! One of the most common problems we see on older Mercedes. Top problems for diesel owners. Kent recommends starting with the basics Yes, Kent has seen it first hand. Don’t neglect this! Could be any number of things causing the problem.
Suddenly, they’ll be hot commodities again, selling for handsome prices, and the mechanics who know how to keep them clattering will be busy again. I’ve seen this happen a few times in my life: the first boom in 1974, when this W123’s predecessors and Peugeot 504 diesels were the ticket in Southern California.
In all Mercedes diesel engines from the first 300D in 1975 up to the mid 1990’s, vacuum (suction) is used to turn the engine off – not electricity! In simple terms – there is a valve mounted on the rear or side of the diesel fuel injection pump. This valve has an arm attached to it that goes down inside the pump.
What happens when you turn off the engine on a Mercedes diesel?
When you turn your key off, electrical power is interrupted and the engine quits immediately. Since a diesel engine does not run on electric spark, the engine has to be shut off by some other means. When you turn the key off on your Mercedes diesel, you may have noticed that the engine will not quit immediately.