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w140 S350td - Diesel Möhkö - Printable Version

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w140 S350td - Diesel Möhkö - JTY - 10-18-2010

Bought a new daily driver for the winter, got it very cheap.
Always wanted a w140 mercedes, specially a diesel one and now i got one Big Grin
It was pretty well equipt from the factory, usually dieseli w140 are without options, but this one had black leather, electric seats, automatic clima. etc. Also it had pretty low milage on the meter, usually these euro S diesels have over 500tkm in the meter.
Idea is to make some small preps here and there, to keep it non superturbo if possible Tongue

Here's few photos in original shape:
[Image: mohko1.jpg]
[Image: mohko2.jpg]

RE: w140 S350td - Diesel Möhkö - JTY - 10-18-2010

Made some modifications to exterior and also to engine.
Made my own software for turbo and IP control, also made new engine harness (old was pretty bad Big Grin), K&N intake kit, disabled EGR and custom injectors modded by me. Exterior mods, Eibach Pro-kit, Sachs Super touring, Altech wheels modded by me, facelift smoke crystal rear lights, facelift grill and headlights with xenon lights.

Here's new pictures:
[Image: mohko-uusi1.jpg]
[Image: mohko-uusi4.jpg]


RE: w140 S350td - Diesel Möhkö - winmutt - 10-18-2010

You too can be in the Russian Mob Big Grin.. I like it.

RE: w140 S350td - Diesel Möhkö - willbhere4u - 10-18-2010

I've always liked the W140 S class they are so over built the doors and glass are just massive! nice car!!!

RE: w140 S350td - Diesel Möhkö - capflya - 10-19-2010

*drools*

RE: w140 S350td - Diesel Möhkö - Silberpfeil - 10-23-2010

(10-18-2010, 05:03 AM)JTY Bought a new daily driver for the winter, got it very cheap.
Always wanted a w140 mercedes, specially a diesel one and now i got one

Could you please tell us more about the diesel they used in the W140?
Displacement, power etc.... Also what else was it used in??


RE: w140 S350td - Diesel Möhkö - ForcedInduction - 10-23-2010

In the USA its the unreliable 3.5L OM603, 147hp.
Outside the USA it was the turbo OM606, 178hp.

RE: w140 S350td - Diesel Möhkö - diesel2fast4u - 10-23-2010

(10-23-2010, 07:08 AM)ForcedInduction In the USA its the unreliable 3.5L OM603, 147hp.
Outside the USA it was the turbo OM606, 178hp.

3.5L was also sold in Europe



RE: w140 S350td - Diesel Möhkö - mb-rene - 10-24-2010

beautyful car,wouldn't mind driving it,what year is it?

RE: w140 S350td - Diesel Möhkö - JTY - 10-26-2010

(10-23-2010, 01:59 AM)Silberpfeil Could you please tell us more about the diesel they used in the W140?
Displacement, power etc.... Also what else was it used in??

This the pre-facelift model S350td with 3.5l OM603 with garrett T3 turbo, no intercooler, first model with ECU controling engine and turbo.
The 3.5l engine is pretty torque beast and moves the massive chassis pretty easy, no complains.
Many have complained that 3.5l om603 is unreliable, but that's only half truth. Here in europe these S350td have been driven hard and long, usually with the same engine (400-600tkm).

Resently i found good thread on this matter were they explaint why there was so many failured 3.5l engines in US and that was because of the low quality diesel. US has lower cetane values for diesel their selling than in Europe and that causes harder knocking and wilder cyliner pressures. It's true that MB made lighter rods for 3.5l engine, but the main problems seems to be in the fuel.



RE: w140 S350td - Diesel Möhkö - ForcedInduction - 10-27-2010

Not the fuel. Only MB knows the actual cause and they won't even acknowledge there was a problem.

RE: w140 S350td - Diesel Möhkö - winmutt - 10-27-2010

(10-27-2010, 05:53 AM)ForcedInduction Not the fuel. Only MB knows the actual cause and they won't even acknowledge there was a problem.

Ya I have seen alot of theories but no facts.

RE: w140 S350td - Diesel Möhkö - Silberpfeil - 10-27-2010

(10-26-2010, 02:28 PM)JTY Many have complained that 3.5l om603 is unreliable, but that's only half truth. Here in europe these S350td have been driven hard and long, usually with the same engine (400-600tkm).

Resently i found good thread on this matter were they explaint why there was so many failured 3.5l engines in US and that was because of the low quality diesel. US has lower cetane values for diesel their selling than in Europe and that causes harder knocking and wilder cyliner pressures. It's true that MB made lighter rods for 3.5l engine, but the main problems seems to be in the fuel.

What cetane can you find where you are?
I go out of my way to always put 42 cetane in my car instead of the 40 cetane everyone else has here in the states and I definitely notice the difference.

RE: w140 S350td - Diesel Möhkö - JTY - 10-28-2010

(10-24-2010, 01:53 AM)mb-rene beautyful car,wouldn't mind driving it,what year is it?

It's from 1993
(10-27-2010, 10:03 PM)Silberpfeil What cetane can you find where you are?
I go out of my way to always put 42 cetane in my car instead of the 40 cetane everyone else has here in the states and I definitely notice the difference.

Cetane value for our diesel is 50-55 (Neste Diesel 51), that's typical normal diesel here in Finland.
But my self i usually use diesel 100 addative with diesel (to top cetane even higher) + some 2stroke oil to keep pump and injectors working Big Grin
Have been using this coctail for over 10years, last diesel MB i drow over 800tkm with original enigne, 300sd was over 500tkm before i made engine overhaul, so no problems here Blush

S350td has been driven over 350tkm with original engine, so let's see how long it will last Rolleyes


RE: w140 S350td - Diesel Möhkö - mike-81-240d - 10-28-2010

Wow I like it. Big Grin

RE: w140 S350td - Diesel Möhkö - JTY - 10-31-2010

Here's few photos of the water injection system.
I tried to keep it as OEM as possible.

So here's more OEM tuning Cool

[Image: mohko-wi1.jpg]
[Image: mohko-wi2.jpg]
[Image: mohko-wi3.jpg]


RE: w140 S350td - Diesel Möhkö - willbhere4u - 10-31-2010

Looks nice I like the tank it makes for a nice clean install!


RE: w140 S350td - Diesel Möhkö - garage - 10-31-2010

I seconed that! That tank is way sweet, very clean.

RE: w140 S350td - Diesel Möhkö - Captain America - 10-31-2010

What tank is that? That thing is dope!

RE: w140 S350td - Diesel Möhkö - George3soccer - 11-01-2010

What water injection system is that. And what nozzles are you running on the 603.

RE: w140 S350td - Diesel Möhkö - JTY - 11-02-2010

(10-31-2010, 09:51 PM)Captain America What tank is that? That thing is dope!

Tank and pump is made by coolingmist, pump is newer generation 200psi model without the annoying pressure switch, so no pressure humping anymore Rolleyes

(11-01-2010, 11:26 AM)George3soccer What water injection system is that. And what nozzles are you running on the 603.

I'm running with a 180cc/150psi (208cc/200psi) nozzle. It's rated for 200-300hp.
Today was the first long trip with waterinjection and it seems to be spot on nozzle for this engine. Fuel consumption went down by 2liters, not truthfull because half of the tank wa sdriven without waterinjection, so it should get even better. Drives very smooth, more torque, torque band wider.


RE: w140 S350td - Diesel Möhkö - George3soccer - 11-02-2010

Thank you very much. Will give those nozzles a try.

What sollution are you running aswell.

RE: w140 S350td - Diesel Möhkö - diesel2fast4u - 11-02-2010

(11-02-2010, 10:36 AM)JTY
(10-31-2010, 09:51 PM)Captain America What tank is that? That thing is dope!

Tank and pump is made by coolingmist, pump is newer generation 200psi model without the annoying pressure switch, so no pressure humping anymore Rolleyes

(11-01-2010, 11:26 AM)George3soccer What water injection system is that. And what nozzles are you running on the 603.

I'm running with a 180cc/150psi (208cc/200psi) nozzle. It's rated for 200-300hp.
Today was the first long trip with waterinjection and it seems to be spot on nozzle for this engine. Fuel consumption went down by 2liters, not truthfull because half of the tank wa sdriven without waterinjection, so it should get even better. Drives very smooth, more torque, torque band wider.

On water only or Mix?

RE: w140 S350td - Diesel Möhkö - JTY - 11-03-2010

(11-02-2010, 12:33 PM)George3soccer Thank you very much. Will give those nozzles a try.

What sollution are you running aswell.

Usually with water/ethanol 60:40, have tried also 50:50, but those were on the 300SD superturbo. That trip was with 70:30 water/Ethanol mix.
Next will try with 60:40 water/methanol (as my ethanol stock is out Cool)


RE: w140 S350td - Diesel Möhkö - George3soccer - 11-03-2010

Let me know how does the water/methanol work out. I have that available very easily.

RE: w140 S350td - Diesel Möhkö - JTY - 11-09-2010

(11-03-2010, 11:53 AM)George3soccer Let me know how does the water/methanol work out. I have that available very easily.

Water/methanol mix (60:40) seems to work better, gave that much more torque that the tranny started slipping Blush
So next step taking tranny out and to Siekkinen for 600Nm prepup and after that bigger turbo and IP to PP-diesel or Mynä for 7mm element modify
Big Grin
Okay better rods before that Shy




RE: w140 S350td - Diesel Möhkö - George3soccer - 11-09-2010

Haha I love it. Very glad the water meth was a better mix, I will be running the same mix as well, but wont be able to give results until spring time. Car is in winter project mode currently.

Please do keep us updated with this motor, and the updates sure do love the work, and clean craftsman ship.

RE: w140 S350td - Diesel Möhkö - JTY - 11-23-2010

Some update on this project. I have been driving around 3000km with the setup and fine tuned the water injection.
With current tune the 1.5gallon tanks lasts for 300km, not so good for MPG but nice power increase when driving WOT
There is big difference in the power if driving with higher meth mix 60:40 and 50:50, 70:30 is too light mix.
Maybe gonna install a 6gallon tank to rear and reverse to original tune, so that it injects little earlier to get better MPG.



RE: w140 S350td - Diesel Möhkö - George3soccer - 11-24-2010

Mpg. Do you mean mpg of the actual fuel consumption. Of mpg of water/meth consumption?

RE: w140 S350td - Diesel Möhkö - JTY - 12-01-2010

(11-24-2010, 08:24 PM)George3soccer Mpg. Do you mean mpg of the actual fuel consumption. Of mpg of water/meth consumption?


Sorry for mistake, i mean fuel mpg Cool



RE: w140 S350td - Diesel Möhkö - mike-81-240d - 05-24-2011

Bump.

RE: w140 S350td - Diesel Möhkö - ANCIENT - 07-06-2011

(12-01-2010, 07:31 PM)JTY
(11-24-2010, 08:24 PM)George3soccer Mpg. Do you mean mpg of the actual fuel consumption. Of mpg of water/meth consumption?


Sorry for mistake, i mean fuel mpg Cool

Mita Gulu,

I too own a 1993 300SD, and looking for ways to improve its performance as well as MPG. Are you able to share with us the details of your mods or even the DIY? Rolleyes

[Image: s300.jpg]

Greetings from US, I was in Oulainen for New Years back in 2000. My ex was from there (Kaski)