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  #1  
Old 11-04-2012, 07:08 PM
Silber Adler's Avatar
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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  
Old 11-04-2012, 07:11 PM
t walgamuth's Avatar
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Location: Lafayette Indiana
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I believe Greazzer does.
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Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a Lotus 7 replica autocrosser with a modified K20 Acura engine.
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  #3  
Old 11-04-2012, 07:13 PM
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Location: Carson City, NV
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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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Anyone who thinks a 300D is fast drives too slow.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 351,xxx miles
08 Triumph Street Triple 21,xxx miles, lowered 10mm in front, Pirelli Angel GT tires, otherwise stock.
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  #4  
Old 11-04-2012, 08:06 PM
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Quote:
Originally Posted by t walgamuth View Post
I believe Greazzer does.
+1 On the Greazzer action. He’s the man.
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1983 200 (Euro 5spd)
1982 300TDT
1981 300D (617.951 swap)
1966 200D
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  #5  
Old 11-04-2012, 09:24 PM
Just Benz'n
 
Join Date: Oct 2012
Location: idaho
Posts: 153
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  
Old 11-04-2012, 10:50 PM
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Location: Carolina
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+2 for greazzer
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Current fleet
1992 300D "IceBerg"
1984 300D "Blues Mobile"

1978 300CD "El Toro" Gone on to be born again
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  #7  
Old 11-05-2012, 01:50 AM
gastropodus's Avatar
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Location: Portland, OR
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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.
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  #8  
Old 11-05-2012, 12:42 PM
Silber Adler's Avatar
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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  
Old 11-05-2012, 02:10 PM
whunter's Avatar
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Location: Metro Detroit, Michigan
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Call me

Quote:
Originally Posted by Silber Adler View Post
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?
I doubt it is the injectors.
Many other issues are more likely.
Your car should top out between 108 - 120 MPH, depending on many variables.


.
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1973 309D - stolen
1978 280SE
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1983 300D
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  #10  
Old 11-05-2012, 02:22 PM
Silber Adler's Avatar
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Join Date: Oct 2012
Location: Living on a gravel road in a Red State
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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:
Originally Posted by whunter View Post
I doubt it is the injectors.
Many other issues are more likely.
Your car should top out between 108 - 120 MPH, depending on many variables.


.
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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  
Old 11-05-2012, 02:54 PM
Silber Adler's Avatar
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Join Date: Oct 2012
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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  
Old 11-05-2012, 08:41 PM
Doktor Bert's Avatar
Das Sturm Uberdoktor
 
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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  
Old 11-05-2012, 11:20 PM
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Location: Valrico, Florida
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Quote:
Originally Posted by Phillytwotank View Post
+2 for greazzer
+3 for greazzer. Just bought a set of injectors from him and they were like new. Great guy to deal with as well!
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  #14  
Old 11-05-2012, 11:43 PM
pawoSD's Avatar
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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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'89 420SEL 168k - mine (OC-170,000)
'93 190D 2.2 - 223k - mine (OC-222,700)
'01 E320 Wagon - 149k - mine (OC-154,000)
'05 C240 4matic Wagon - 153k - wifes (OC-154,500)
'01 E320 - 162k - Dad's (OC-163,500)
'07 E350 Wagon - 116k - dad's (OC-121,500)
'02 E320 - 193k - Brother's (OC - 192,000)
'09 E350 4matic Sedan - 84k - Brothers (OC-85,500)
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  #15  
Old 11-06-2012, 01:48 AM
whunter's Avatar
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Answer #1

Quote:
Originally Posted by Silber Adler View Post
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.
OK, some possible issues.

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
asemastermechanic@juno.com

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.
Prototype Vehicle build.
Prototype Fleet Durability
Prototype vehicle instrumentation.
Technical Quality Auditor.
Automotive Technical Writer

1973 300D
1973 309D - stolen
1978 280SE
1980 240D
1983 300D
1984 190D
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