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The Toecutter · 06-22-2010, 05:10 AM

The following topic has a BSFC map for the Mercedes Benz OM617 5 cylinder turbodiesel engine used in the 300 SD, along with a lot of other relavent graphs:

OM617 SAE Paper

I saved a copy and am posting it here:

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I do believe the OM617 is the 2nd sturdiest engine ever put in a passenger car sold in the U.S. The OM617 can repeatedly and regularly last 500,000+ miles before a rebuild, provided you do regular maintenance. Some examples had been run with no oil(not low oil, no oil) and have lasted 20,000+ miles operating in those conditions. The show LeMons once had a segment where a crowd gathered around a clunking 617 and tried to get it to sieze up while running; they poured liquid sement, rocks, milk, and other things into the engine to try to seize it, and it kept on clunking... The #1 place goes to the 4 cyl used in the 240D, which can reliably rack up more than 1 million miles before a rebuild. The engine used in my 300 SDL is very well built, but its reliability just doesn't compare with the 5 cyl.

That said, for such a tank-like engine, the efficiency is not that bad, either. The C111-III streamliner used this engine, but with a larger turbo. The stock internals of the 617 engine can reliably handle 400 horsepower, although the C111-III was a bit conservative with the upgrades.

06-22-2010, 05:10 AM	#155 (permalink)
The Toecutter Master EcoModder Join Date: May 2010 Location: Ghettoville, USA Posts: 251 Rebellion - '16 KMX Framekit Custom electric velomobile Thanks: 149 Thanked 187 Times in 112 Posts	The following topic has a BSFC map for the Mercedes Benz OM617 5 cylinder turbodiesel engine used in the 300 SD, along with a lot of other relavent graphs: OM617 SAE Paper I saved a copy and am posting it here: I do believe the OM617 is the 2nd sturdiest engine ever put in a passenger car sold in the U.S. The OM617 can repeatedly and regularly last 500,000+ miles before a rebuild, provided you do regular maintenance. Some examples had been run with no oil(not low oil, no oil) and have lasted 20,000+ miles operating in those conditions. The show LeMons once had a segment where a crowd gathered around a clunking 617 and tried to get it to sieze up while running; they poured liquid sement, rocks, milk, and other things into the engine to try to seize it, and it kept on clunking... The #1 place goes to the 4 cyl used in the 240D, which can reliably rack up more than 1 million miles before a rebuild. The engine used in my 300 SDL is very well built, but its reliability just doesn't compare with the 5 cyl. That said, for such a tank-like engine, the efficiency is not that bad, either. The C111-III streamliner used this engine, but with a larger turbo. The stock internals of the 617 engine can reliably handle 400 horsepower, although the C111-III was a bit conservative with the upgrades.