What did Mercedes Benz do to the 617 turbo diesel to change the specification and up the HP by two and MPH top by 5mph?

I see this slight change listed as happening in 9/83 but don't know what they did to achieve it.

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1983 300D-Turbo - Deep Blue w Palomino MB Tex (total loss in fire 1/5/09 RIP)
1995 E320 W124 Polar White/Grey Mushroom MB Tex
2005 F150 Supercrew - Arizona Beige - Lear topper
1985 Piaggio Vespa T5 - Black and Chrome

www.cphilip.com

somewhere along about then they changed the way the turbo mounted I believe, perhaps that has something to do with it.

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.

I think they revised the cam shaft design.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Only the '85 Cali has a different turbo mount I think.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

1985

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Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.

I thought the camshaft change happened in 1980 when HP went up to 120.

Maybe they just became better liars in 1983?

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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 (??)

To be honest I wondered if it was just a myth... Or some sort of "re-rating".

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1983 300D-Turbo - Deep Blue w Palomino MB Tex (total loss in fire 1/5/09 RIP)
1995 E320 W124 Polar White/Grey Mushroom MB Tex
2005 F150 Supercrew - Arizona Beige - Lear topper
1985 Piaggio Vespa T5 - Black and Chrome

www.cphilip.com

I think the turbo engine (617.950) started at 120 HP and was uprated to 125 with the new cam in the 617.952

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

No, it was 110 in 1978 and 79, then they hardened and messed with the cam to get it to 120 (which my 80 W116 has). They did something else to get it to 123 (which my 83 300D has) and then I think to 125 by 1985, but what I dunno.

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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 (??)

Most mentions I can find show it going from 123 to 125 exactly at 9/83 for some reason. Anything significant about September?

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1983 300D-Turbo - Deep Blue w Palomino MB Tex (total loss in fire 1/5/09 RIP)
1995 E320 W124 Polar White/Grey Mushroom MB Tex
2005 F150 Supercrew - Arizona Beige - Lear topper
1985 Piaggio Vespa T5 - Black and Chrome

www.cphilip.com

August or September is usually the beginning of production for the next model year, so we are probably looking at 1984 and 1985 vehicles having this slightly higher HP rating. There were a number of subtle interior changes that also happened on the 84's & 85's, 2 more HP may have been part of the list.

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150

Yes... they are in US terms about when new production would begin. More like August most times for US production resume. But didn't think MB would work in a production change on our terms. Oddly placed for them I would think.

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1983 300D-Turbo - Deep Blue w Palomino MB Tex (total loss in fire 1/5/09 RIP)
1995 E320 W124 Polar White/Grey Mushroom MB Tex
2005 F150 Supercrew - Arizona Beige - Lear topper
1985 Piaggio Vespa T5 - Black and Chrome

www.cphilip.com

Well our 1983 has a build date of either Aug or Sept of 1982 and it has always been registered as an '83. In fact the vin sequence has a 'D' in the 10th spot designating 1983 as the model year.

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150

Yea... its hard to tell if they meant exactly it was changed at exactly 9/83 or what. I would have to assume they really mean thats when the change occurred though. Not when something was officially titled or something like that. The references point to a date of change.

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1983 300D-Turbo - Deep Blue w Palomino MB Tex (total loss in fire 1/5/09 RIP)
1995 E320 W124 Polar White/Grey Mushroom MB Tex
2005 F150 Supercrew - Arizona Beige - Lear topper
1985 Piaggio Vespa T5 - Black and Chrome

www.cphilip.com

There's a code on the build sheet that modifies the model year. It is code 80* and it states" Change of year of model, last figure shows new model year" the *would be the year For example my 84 300D has an 804 code which modifies the model year to 1984 even though it was built in 1983.
Perhaps this was a code used only used on US models?

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012