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#1
11-04-2012, 07:08 PM
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98mph. 1985 300D, (dirty plugged filters + previous owner lack of maintenance)
Normally I drive pretty frugal but today on the interstate on a flat road I opened it up. Just wanted to see what it would do.
98mph at 4200 rpm.The previous owner had mentioned that he never replaced the injectors in the 7 years that he owned. I m betting that the injectors are factory new. Probably carboned up with cones blocked and out of spec on pop pressure. Does any forum member rebuild or exchange injectors? .
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85 Merc 300D - Unwinding 31 years of wear 86 VW TD Mahindra Diesel Iseki Diesel In 2007 I didn't own a diesel. Last edited by whunter; 01-26-2014 at 09:54 PM. Reason: clairity 
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#2
11-04-2012, 07:11 PM
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I believe Greazzer does.
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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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#3
11-04-2012, 07:13 PM
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Something is a little off. You should be getting about 10 mph more on top end. In addition to injectors it's a good idea to check your boost under load to see if it's in spec, and check the accelerator linkage to make sure it's getting to the max fuel position when you floor it.
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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. 99 Mazda Miata 183,xxx miles.
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#5
11-04-2012, 09:24 PM
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i have stuff to rebuild injectors also .
i put monarch tips in the last ones i did . you can look at the top part of the injector and its pretty easy to tell if they have ever been taken apart .
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current fleet Ford f350 dully 7.3L 1990 . ats turbo , zf5 Mazda 4x4 b2600 with 617 20-26 mpg  Past fleet 1983 240D w123 232k 25-30 MPG 1984 Ford f250,1979 ford 150 300-6 (sold@ 251K ) 81 300D, 79 240D , 2x 76 300D ,74 240D , 2x 89 grand prix , 85 grand fury , and several other fords Custom machine shop work ..
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#6
11-04-2012, 10:50 PM
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+2 for greazzer
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Current fleet 2006 E320 CDI 1992 300D - 5speed manual swapped former members 1984 300D "Blues Mobile" 1978 300CD "El Toro"
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#7
11-05-2012, 01:50 AM
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Also, C Sean Watts does a great job on injectors. I have purchased rebuilt injectors from him with Monark tips for both of my vehicles, and they are great.
Kurt
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- '79 240D - engine swap complete! Engine broken in! 28-31 mpg! Lovin' the ride! - '86 190D (W201-126) - 2.5 NA engine, 5 speed, cloth interior, manual climate controls, 33-34 mpg (sold to forum member).
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#8
11-05-2012, 12:42 PM
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Thanks to those who responded. It runs now and doesn't leak a drop of diesel. I want to be sure that it is this condition once I change the injectors.
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85 Merc 300D - Unwinding 31 years of wear 86 VW TD Mahindra Diesel Iseki Diesel In 2007 I didn't own a diesel.
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#9
11-05-2012, 02:10 PM
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Call me
Quote:
Many other issues are more likely. Your car should top out between 108 - 120 MPH, depending on many variables. .
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ASE Master Mechanic https://whunter.carrd.co/ Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 2003 Volvo V70 https://www.boldegoist.com/
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#10
11-05-2012, 02:22 PM
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Hi,
Can you give me an idea? air or fuel filters? the pre filter looks clear. The PO admitted that he never changed the injectors, before that it was owned by one other guy. I have a new set of filters on order from you guys and am going change them first. The air filter in it is quite dark. I have taken the snorkel off the turbo, it turns but doesn't truly spin to the touch. Thanks It starts, doesn't smoke. Seems to get about 30 mpg. I figure that with the injectors being over 7 years old, maybe 27 years old, they could well be part of the problem. Not that I need a car that goes that fast but just wanting the most efficiency as possible. Quote:
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85 Merc 300D - Unwinding 31 years of wear 86 VW TD Mahindra Diesel Iseki Diesel In 2007 I didn't own a diesel.
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#11
11-05-2012, 02:54 PM
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I should add that my fuel comes from my bulk tank. It is 20% bio diesel, I get it from the local fuel supplier who supplies a lot of commercial accounts.
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85 Merc 300D - Unwinding 31 years of wear 86 VW TD Mahindra Diesel Iseki Diesel In 2007 I didn't own a diesel.
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#12
11-05-2012, 08:41 PM
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Use the force....
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 Did you just pass my 740 at 200 kmh in a 300SD?????1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013 100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership 
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#13
11-05-2012, 11:20 PM
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Quote:
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1984 Mercedes-Benz 300D
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#14
11-05-2012, 11:43 PM
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Biodiesel cuts the power output a bit, at least that is what I experienced on B20, not a lot, but it certainly does a bit.
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-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#15
11-06-2012, 01:48 AM
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Answer #1
Quote:
Biodiesel has a lower BTU per gallon compared to DIESEL. You can spike your tank with 4oz - 16oz of 2 stroke oil for more power. https://docs.google.com/document/d/1QkAv-HFaLqpK_5wKCln6DODkfw_DkjBHVYZXm0nUtEw/edit?hl=en_US&authkey=CJXuhs0I physics of turbo question physics of turbo question Exhaust leak between engine and Turbo Exhaust leak between engine and Turbo OM617 87 300SDL exhaust flex coupling- where to buy? 87 300SDL exhaust flex coupling- where to buy? Turbo Cartridge Replacement Turbo Cartridge Replacement Turbo Rebuild Turbo Rebuild Rebuilding Turbo Rebuilding Turbo Need help: Garrett turbo rebuild on OM617 1982 300SD Need help: Garrett turbo rebuild on OM617 1982 300SD Adjusting the Turbo Wastegate Tweaking the Mercedes 617 Turbo Diesel What causes low boost readings ? What causes low boost readings ? Turbocharger Wastegate Adjustment: Turbocharger Wastegate Adjustment: The Garrett/AiResearch turbo is harder but not too complicated; it's just a pain to get to the adjustment. There's a good series of pictures here: Garrett Turbo Wastegate Adjustment - Benzworld.org - Mercedes-Benz Discussion Forum Turbo boost guage advice needed Turbo boost guage advice needed .
__________________
ASE Master Mechanic https://whunter.carrd.co/ Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 2003 Volvo V70 https://www.boldegoist.com/
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