Replacing clutch fan with electric? - Mercedes-Benz Forum
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post #1 of 14 (permalink) Old 06-08-2019, 11:55 AM Thread Starter
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Replacing clutch fan with electric?

Has anyone retrofit an electric ML55 style fan to replace the clutch fan? Wondering if it's worth it and if it would yield a few more MPGs?

https://www.amazon.com/1635000293-Ra...s%2C189&sr=8-3
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post #2 of 14 (permalink) Old 06-08-2019, 12:08 PM
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Originally Posted by LegendaryATM View Post
Has anyone retrofit an electric ML55 style fan to replace the clutch fan? Wondering if it's worth it and if it would yield a few more MPGs?

https://www.amazon.com/1635000293-Ra...s%2C189&sr=8-3
You dont have this on your '00 ML55?
And who ever purchased a ML55 for mileage savings?....

I dont see why it wont work.
This is on our ML500 AND
the link also says "For Mercedes ML55 AMG 2000-2003"

Contact the seller to confirm.
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post #3 of 14 (permalink) Old 06-08-2019, 12:16 PM
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If you need more MPGs get lighter pair of shoes.

In ML500/55 fan is controlled by engine temperature and refrigerant pressure/temperature map. You would need to develop controller that can simulate that. Then there is reliability factor. Fan clutches almost never fail from one second to the next. Electric things do.

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post #4 of 14 (permalink) Old 06-10-2019, 02:26 PM
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I have a hard time imagining it would help that much.

Do you think your current mechanical fan clutch is working properly ?

Our ML500 already has the electric fan you're referencing, and MPG is still so-so.

What is your MPG now ?

This looks like a reproduction aftermarket part. If it works well, that's a pretty good price.

I think they're 2 to 2.5x that for the stock part, if memory serves.

I've learned that the V-8 ML's are just a hungry beast. That goes double if you are doing lots of stop & go or mixed highway miles.

The only time I've said: "Wow, pretty good MPG !" was on long road trips at steady state speed...just sayin !

Cheers - David

Gone, and fondly remembered:

1975 240D - 4 speed manual, power nothing
1984 190E 2.3 - Cute, reliable & slow
1983 300SD - Great highway tourer, 28mpg

Here & greatly appreciated:

2000 E 320 Wagon -
2002 ML 500 - Finally got one !

Last edited by 2000 E 320 White Wagon; 06-10-2019 at 02:31 PM. Reason: Clarity
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post #5 of 14 (permalink) Old 06-11-2019, 09:51 AM
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Originally Posted by 2000 E 320 White Wagon View Post
I've learned that the V-8 ML's are just a hungry beast. Cheers - David
Compare them to any other V8 and you will see they are not hungry at all...................
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post #6 of 14 (permalink) Old 06-11-2019, 10:18 AM
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Simply dropping highway speed from 80mph to 70mph improves mileage 10%. Dropping to 65 gains another 10%.
https://www.mpgforspeed.com/
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post #7 of 14 (permalink) Old 06-11-2019, 10:26 AM
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Compare them to any other V8 and you will see they are not hungry at all...................
Lol- I dont even care to fathom what our E50 eats. Just fill n go. Never got this for it's mileage credentials.
Im happy with the ML. It's an obedient Beast.
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post #8 of 14 (permalink) Old 06-12-2019, 07:04 PM
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Quote:
Originally Posted by LegendaryATM View Post
Has anyone retrofit an electric ML55 style fan to replace the clutch fan? Wondering if it's worth it and if it would yield a few more MPGs?

https://www.amazon.com/1635000293-Ra...s%2C189&sr=8-3
Ok a thought just occurred.

Agreed that Witek said difficulty would be controlling fan per the MB scheme.

Q: If you now have mechanical fan that works by a heat sensitive viscous clutch then its now totally "analog", right ?

If this is so, you should be free to add in an acessory fan that fits ML radiator & can move enough air and use a simple temperature probe with preset on / off points & HD relay.

Here is a fan that is really close in size to ML radiator at 24"w x 19"h Fan & shroud, 3000 cfm - original application for Ford / Mercury V-8 4.7 litre.

Below is also simple relay & temp probe controller.

Only concern might be to coordinate temp with engine thermostat.

Some guys use these in place of mech fan on Dodge Ram 5.9 Cummins fan conversion.

If it will cool the mighty Cummins, the M-112 or M-113 should be no issue.

Having trouble posting link.

Its Dorman Electric Fan 620-118.
@ www.amazon.com for $78...

Cheers - David

Gone, and fondly remembered:

1975 240D - 4 speed manual, power nothing
1984 190E 2.3 - Cute, reliable & slow
1983 300SD - Great highway tourer, 28mpg

Here & greatly appreciated:

2000 E 320 Wagon -
2002 ML 500 - Finally got one !
2000 E 320 White Wagon is online now  
post #9 of 14 (permalink) Old 06-12-2019, 07:24 PM
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Quote:
Originally Posted by 2000 E 320 White Wagon View Post
Ok a thought just occurred.

Agreed that Witek said difficulty would be controlling fan per the MB scheme.

Q: If you now have mechanical fan that works by a heat sensitive viscous clutch then its now totally "analog", right ?

If this is so, you should be free to add in an acessory fan that fits ML radiator & can move enough air and use a simple temperature probe with preset on / off points & HD relay.

Here is a fan that is really close in size to ML radiator at 24"w x 19"h Fan & shroud, 3000 cfm - original application for Ford / Mercury V-8 4.7 litre.

Below is also simple relay & temp probe controller.

Only concern might be to coordinate temp with engine thermostat.

Some guys use these in place of mech fan on Dodge Ram 5.9 Cummins fan conversion.

If it will cool the mighty Cummins, the M-112 or M-113 should be no issue.

Having trouble posting link.

Its Dorman Electric Fan 620-118.
@ www.amazon.com for $78...

Cheers - David
Your scenario covers only engine temperature. What about ac?

105 F outside, 5 pm, engine cold after all day at work. Ac on high, refrigerant pressure @450 psi, compressor turns off for safety. Sweat running down your balls.

1972 280SEL 4.5
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post #10 of 14 (permalink) Old 06-13-2019, 08:31 AM
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Right on Art.

This relay / temp probe kit has a terminal for A/C compressor to turn on fan - shouldn't be a problem right ?

https://www.amazon.com/gp/aw/d/B001S...KIKX0DER&psc=1

Dorman 620-118
Powerful V-8 electric fan
3000 cfm

https://www.amazon.com/gp/aw/d/B07F6...018EBU1K&psc=1

Simple electric fan thermostat relay controller

Gone, and fondly remembered:

1975 240D - 4 speed manual, power nothing
1984 190E 2.3 - Cute, reliable & slow
1983 300SD - Great highway tourer, 28mpg

Here & greatly appreciated:

2000 E 320 Wagon -
2002 ML 500 - Finally got one !
2000 E 320 White Wagon is online now  
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