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#1
10-25-2006, 10:22 AM
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617 engines, 116 vs 126
What's the difference (if any) in a turbo 617 from a '79 SD 116 vs one from a '81-84 SD 126?
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#2
10-25-2006, 10:33 AM
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Wdan,
The 617 engines in the 126 models had more anti air pollution devices on them such as EGR. That's what all the vacuum stuff on the valve cover is for. P E H
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#3
10-25-2006, 11:00 AM
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Quote:
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#4
10-25-2006, 11:03 AM
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AFAIK, all the 617's have the same mounting points, even the non turbo's. some have A/C compressors in differant locations, and some have differant length alternator brackets and such, but the engines are all the same...except for the TD motor that has that pump for the wagon's suspension stufff.
John
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#5
10-25-2006, 11:20 AM
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Be careful here-
The mounting points on the engine are the same, but the alloy arms that bolt to the chassis are very likely different for all chassis. The pre-1980 OM617.95 is rated at 110 Hp vs 120 or 123 for the later W126 and W123 variants. The earlier camshafts weren't as hard as the later ones and can wear. The upper oil pan on the early engine that fits the W116 is smooth. On the W123 and W126 it has stiffening ribs. The later engine will not fit a W116 chassis without swapping (or grinding   ) the ribs. This would be to clear the rear subframe bar that the W116 has. An early engine will fit the W123 or W126 chassis , but not the other way around, unless you address the oil pan.Rick
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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)
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#6
10-25-2006, 11:30 AM
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The W116 300SD had less HP, the breather hose was set up a little differently than the W126 300SDs, there was no EGR on the W116 300SDs until 1980, which was the last year for that bodystyle.
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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123.
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#7
10-25-2006, 11:38 AM
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slight correction to H-t, the 1980 300SD has 120hp
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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)
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#8
10-25-2006, 12:35 PM
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Here is a Wikipedia link that has a little info on the 617.950 (w116) and 617.951 (w126) that you may want to look at.
http://en.wikipedia.org/wiki/Mercedes-Benz_OM617_engine Richard
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1983 123.133 California - GreaseCar Veg System 
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#9
10-25-2006, 06:43 PM
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what about oil filter configuration, and ac mounting points?
i think the early cars had the oil filter accessed from below and the (shudder) frankenstein ac bracket. tom w
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#10
10-25-2006, 08:10 PM
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Not real sure about the AC. My 80 has an R4 at the bottom and I think even the 78s and 79 were the same. They all had the upright oil filter housing
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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)
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#11
10-25-2006, 08:45 PM
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i think if they have the toploader oil filter they prob have the good ac mount.
tom w
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#12
10-25-2006, 10:50 PM
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Now this all has got me curious about exactly just what engine I stuffed into my 240, I only know it was supposedly from a newer car, that its a 5 cyl 617.?, the vac pump looks a little different in that it only had one port going to the booster instead of 2 ports (original had a second to air cleaner lid) and that the box of accy's and parts that came with the motor had a cylindrical shaped ac pump instead of the black round Delco unit in mine. Never got to see what car it came out of. Guess I oughta go check the stamping again..
Camshaft! Dangit I just got back from the wreckers this afternoon too... I know I need one, can visibly see a higher ridge along the non wearing edge of a lobe.
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