617A electric fan - your setup - Page 2 - PeachParts Mercedes-Benz Forum

charmalu · #16 03-15-2013, 01:01 PM

Quote:

Originally Posted by Simpler=Better

Do you know exactly what temp that switch turns on and off at?

OK....some more Google searching....Ta Da....

Thread Size...M14 X 1.5mm
Temp Range 85/80c 100/95c

I also see one for a 85 - 87 190e 2.3 006 545 37 24 aux fan switch
and one for 91 - 93 190e 2.3 006 545 90 24

Didn` find the temp range though.

Found a temp switch for a Spal electric fan, 195-ts, on @ 195F and off @ 175F. 3/8" NTP thread.

Charlie

SirNik84 · #17 03-15-2013, 01:59 PM

My setup is a $70 autozone fan and the switch Charlie posted. Charlie actually gave me the switch when I ran into him at the pick n pull!!! THANKS!

Anyway, the fan is on a relay, the relay is triggered by the thermal switch. The switch is on the ground leg of the circuit. I ran another wire into the passenger compartment and replaced the antenna up down switch with a toggle switch (the one MB used for the rear area light)

I normally hit the fan button at the bottle of a hill. I like having a manual control.

The switch comes on at 100*c I normally don't hear my fan come on automatically unless its the middle of summer in traffic.

I attached a PDF of my fan circuit.

Simpler=Better · #18 03-15-2013, 02:01 PM

Quote:

Originally Posted by charmalu

OK....some more Google searching....Ta Da....

Thread Size...M14 X 1.5mm
Temp Range 85/80c 100/95c

I also see one for a 85 - 87 190e 2.3 006 545 37 24 aux fan switch
and one for 91 - 93 190e 2.3 006 545 90 24

Didn` find the temp range though.

Found a temp switch for a Spal electric fan, 195-ts, on @ 195F and off @ 175F. 3/8" NTP thread.

Charlie

Muchas gracias. I'm in the market for a 210°F-on / 195°F-off switch. Found one for a Buick that meets the criteria, but it's $30

cho · #19 03-15-2013, 05:03 PM

Quote:

Originally Posted by kerry

I had an electric fan for the 617NA in my 409d. It was inadequate under high load conditions. Switched to a direct drive fan and the engine stayed cool under all conditions. Why not just add a fan clutch to your existing engine?

well...I did not set my mind yet...I know that I have to drop direct fan
so far I'm collecting data for both options,for the Visko fan clutch all is well known,..the electric one intriques me...

optimal solution for electric has to have shroud,has to have 2 speeds
also as a backup 2 fans are desired,plus pull has to be with some
serious cfm at least in second gear. if those conditions are met under 16A
we have a winner

.

Diesel911 · #20 03-15-2013, 06:55 PM

Each Month there is always a few People who have their Alternators die on them and get up in the Morning and cannot start.

You can jump start the Car but how far will you be able to drive with your Electric Fan in that situation?

cho · #21 03-16-2013, 04:03 AM

.

good point,... I guess the only solution to that one is to yank 25-30yrs old one
and plunge in a new or rebuilt one.

.

Stretch · #22 03-16-2013, 09:48 AM

My take on the whole mechanical / electric fan argument is this

1) With out a fan on the front of the water pump pulley it is way easier to change the alternator belt - undo the water pump pulley - job done!

2) A whirring lump of junk on the end of the water pump pulley just sucks power - my non-turbo OM617 needs all the help it can get

3) In my climate a cooling fan isn't needed most of the time - though where cho lives it gets a bit hotter

4) The mechanical system is always working even when cooling isn't necessary - I think it is better to have one that comes on when needed - this is progress chaps!

charmalu · #23 03-16-2013, 11:05 AM

Quote:

Originally Posted by Diesel911

Each Month there is always a few People who have their Alternators die on them and get up in the Morning and cannot start.

You can jump start the Car but how far will you be able to drive with your Electric Fan in that situation?

I had the fan clutch assy decide to head south when I was going north from Arizona going into southern Calif on my way home. sure made a racket.

I also had a bearing start to complain in an Alternator.

At work several yrs back we had a Dodge PU that had the Fan/Clutch assy come off and go into the Radiator three times different times ovet the 10 yrs they had it.

Any thing is possible to happen, just can`t run with fear in the back of my mind thinking, What if?

At hwy speeds or probably anything over 25mph, there is enough air going through the radiator that the fan isn`t doing much.
As I mentioned above, I haven`t had a over heating/cooling problem with my electric fan.
Be sure to buy a good quality fan. my first one was a Zirgo off E-Bay, didn`t last long. the Chicoms didn`t use good quality bearings or they used bushings instead. I replaced it with a Spal, just make sure it pushes the right amount of CFM`s. they are not all rated the same.

If these fans are bad or not efficient, then why are they installed in new cars? or look at the Hot Rods/Streed Rods, they use electric fans in a lot of their mods.

Charlie

cho · #24 03-19-2013, 04:15 PM

Quote:

Originally Posted by charmalu

.... just make sure it pushes the right amount of CFM`s. they are not all rated the same.

Charlie

yes....sometimes is hard to find actual CFM data on specific fan....

.

Tmadia · #25 03-19-2013, 04:35 PM

It looks like this one may work in the thermostat housing.

Painless Performance Temperature Sending Units 30113 - SummitRacing.com

eatont9999 · #26 03-19-2013, 06:57 PM

Mom's car (used to be mine) - 2003 Nissan Sentra - electric fan failed, blew head gasket due to over heating. Cost me $1500. No it did not happen while I owned the car.

Mom's car - 2004 Dodge Intrepid - Parked for a year and a half because no one could figure out why it was over heating. Mom took it to 4 different mechanics, including the dealer. I fly out for a visit, look at the car, re-seat the fan relay and the E-fans kick on. Car runs and drives fine now.

Would I ever consider having an electric fan as the primary cooling fan in one of my vehicles? NEVER.

cho · #27 03-20-2013, 06:39 AM

Quote:

Originally Posted by Tmadia

It looks like this one may work in the thermostat housing.

Painless Performance Temperature Sending Units 30113 - SummitRacing.com

thanks mate,this one might do the job!!

96C on...gooooood - single mode tho.....

.

Simpler=Better · #28 03-20-2013, 09:39 AM

Quote:

Originally Posted by eatont9999

Mom's car (used to be mine) - 2003 Nissan Sentra - electric fan failed, blew head gasket due to over heating. Cost me $1500. No it did not happen while I owned the car.

Mom's car - 2004 Dodge Intrepid - Parked for a year and a half because no one could figure out why it was over heating. Mom took it to 4 different mechanics, including the dealer. I fly out for a visit, look at the car, re-seat the fan relay and the E-fans kick on. Car runs and drives fine now.

Would I ever consider having an electric fan as the primary cooling fan in one of my vehicles? NEVER.

Every FWD car I've ever seen has one

eatont9999 · #29 03-20-2013, 05:38 PM

Quote:

Originally Posted by Simpler=Better

Every FWD car I've ever seen has one

All the FWD cars I know of have engines mounted with the crank perpendicular to the frame. I imagine it would be hard to have a clutch fan and radiator in a fender. LOL

ruchase · #30 03-21-2013, 01:42 AM

My euro 300d has a 2 speed e-fan installed by the PO (some after market thing with the probe stuck in the radiator upper hose)...it works great in the hot SoCal summers, especially with some of the steep grades we have in the La Crescenta/Montrose area. However, one time I drove off from home without knowing the inline fuse was out, while another time the ground wire snapped off the fan connector. However, easy fixes in both cases, and keeps the car running way cooler than my NA 300cd. The only down side is the fan does make a lot of noise, especially after a long drive.