I have always done the electric fan mod on all my past vehicles because of the power and mpg gain and reliability. I have a few questions: Will I see a noticeable gain with this motor 2.5 NA? Also can I use the stock switch to turn no the auxiliary fan?

What temp does the coolent temp sensor turn on?

What is this mod? Is it where you alter the temp at which the fans turn on?

I do not know your car but you can check the thermostat sensor and color on the engine block.

Red: 006-545-42-24 (100/110)
Green: 006-545-45-24 (105/115)
Grey: 006-545-61-24 (105/120)
Blue: 006-545-64-24 (105/128)

First # is the temp the Aux fan would turn on at high speed. The 2nd # is the temp the A/C will be cut off.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

There will be NO noticeable gain in horse power or MPG on the 2.5 NA.

NO, you should NOT use the stock switch, it activates at a much higher temperature than the hydrostatic fan clutch.



.

__________________
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.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Thanks for the information!
I really am just trying to do anything possible to get a little more power and MPG out of this motor with out compromising on reliability.
I just put new tires on it, ordered, a k&n, tie rod assembly, and rear stay control arms. I have already replaced engine fuel lines, glow plugs, and removed fuel thermostat.

I have electric fan thermostat kit that I will put on it to give it a try. I will let you know how it goes. Is there anything else that you know of that could help I would appreciate the help. I am not only new to MB, but also new to diesels.

Ok if I can't use the stock sensor can I remove it and add a after market one that turns on earlier? Or does both of the send info to the ECM?

It gets more air than it can ever use through the OEM filter.

K&N filter topic links thread
http://www.peachparts.com/shopforum/diy-links-parts-category/173036-k-n-filter-topic-links-thread.html#post1354738

The only cheap way to boost power is:

* Replace the engine with a turbo 2.5.

I like many others have been using k&n for many years with all my vehicles and they are all still on the road some people are cheap and ill advised. but thinks for the information.

Also I would never put a turbo on mine just for the pure simple fact I bought this car for to get good MPG not bad I would loose any were from 5-10 plug MPG doing that not to mention over 2500 to swap it.

If I want power I will jump into my 06 VW Jetta GLI 2.0T.

My goal is to get more power, plus more MPG any other ways?

If you do a little homework, you may find that a turbo engine will get better MPGs than a NA one. It all depends on how it's set up & how it's driven.

I wish I had some links or something for you to go to, but maybe someone else will chime in.

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1987 300DT
2002 Ford F-250 7.3 Crew Cab Short Bed

Lose MPG by adding a turbo? I think not.

You may lose city MPG, if you put your foot in it all the time, but highway MPG should go up with a turbo.

I've been told but have not researched it myself that turbos increase the efficiency of a diesel. Whether your mileage increases depends on how you drive.

If my statement is incorrect hopefully someone will correct it.

In theory it ought to improve the overall efficiency. The problem is it's hard to avoid the temptation to use the extra power.

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1981 Mercedes 300TD, 1994 Honda Civic Del Sol
http://mefi.us/images/fuelly/smallsig-us/67195.pnghttp://mefi.us/images/fuelly/smallsig-us/103885.png

Go to this web site and click on 1987 and see for yourself. I know these are a little off cause my 86 190D NA gets over 25 city and over 33 hwy, but it show how they compare.

Most people how have the turbo are going to put there foot into it, trust me I find i vary difficult not to in my Jetta and after Im like MPG lol. No ist still gets at least 30 cursing over 80MPH.

Anyone with the 190D turbo here?
What are your real MPG running

My '87 190D turbo automatic got around 36mpg every day on the freeway with the cruise set at 74mph. On a regular commute on 55mph 2-lane when I was good to the loud-pedal I would get 40.5mpg. The turbo car is a fuel-mileage king for a mid-'80s 3300lb car.

Turbos do increse the efficiency on a diesel.

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Gone to the dark side

- Jeff