The OrgServing W116 Enthusiasts since 2004!
Started by citymunky, 29 March 2010, 08:14 PM
Quote from: Major Tom on 30 March 2010, 04:29 AMis the car stored in a garage or outside ?in cold climates such as yours a diesel would benefit greatly from the installation of a block heater. If your driving the car everyday i would have it connected to a timer so the block is warm and the engine starts instantly when your ready to leave in the morning. Generic ones must be on the shelf in that part of the world.
Quote from: s class on 30 March 2010, 05:23 AMa), check fuel delivery rates. The next possible issue is internal leakage in the injection pump. Once the engine is running, fuel delivery may be sufficient to overcome any internal leakage. But when shut off, if there is internal leakage, pressure on the injectors drains away. b) Is there a throttle valve in a diesel? check for obstructionsc) This is an important one, because a diesel engine is a compression-ignition system. Weak compression is what eventually sidelines high mileage diesels often. If you haven't recently checked compression, it may be worth while.d) When the engine is running, the heat produced by combustion is sufficient to sustain the required heat. At start-up, one relies on the glow plugs to achieve this. So yes, they need to be fully functional.
Quote from: wbrian63 on 30 March 2010, 08:39 AM "I think" the glow plug light should stay on for the entire glow cycle. Does it stay on briefly and then go out, or does it stay on for the duration of the glow cycle? You might try more than one glow cycle.I don't know about W116 diesels, but some older MB's used serial connections to power the glow plugs. Voltage fed the first plug, which in turn fed the second plug, which in turn fed the 3rd plug, etc. The draw each plug reduces the voltage available to the next plug down the line and lengthens the amount of time for all the plugs to get up to temp. There's a "kit" available to convert serial plug setups to parallel, where all plugs get full voltage at the same time. As I understand it, this is a far better setup.Also - folks here are some of the nicest in the world, but many of them are Aussies - and the W116 diesel cars were never available for sale in AU, so their experience may be limited.I'd suggest posting your issues to PeachParts.com (used to be MercedesShop.com). There's an entire section dedicated to MB diesels, and if those guys can't help you with your problem, your car's not fixable.
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