Peter, I installed a 16" Spall electric fan inplace of the belt driven fan on my 85 300D. I bought the fan at a Good-Guys hot rod show from one of the vendors. along with the fan buy the rubber gasket that goes around the edge of the fan to protect the radiator fins. I think the mounting kit comes with the fan.

It makes it easier if you have the fan out and laying on your work bench. Install the mounts into the edge of the fan. I attached mine with Pop Rivits into the metal edge of the radiator. will need some spacers between the radiator and the mount arms when you pop them on. I used washers same size of the pop rivits.

For the wiring, I used a MB ice cube relay so it looked factory. I cut one off a PNP car so I had the plug and enough of a pig tail to solder my wires to.
good thing about MB plugs is you can take them apart and move the pins around to have what ever color or size you need in the proper hole.

I mounted the relay under the black box on the left fender next to the AC relay.

Power comes from the battery, or connect into the little black connection box on the R/fender by the battery with the 3 screws under the cover.
Power goes to #30, also had to hook power to #86.

Power goes from #87 to fan.

#85 goes to a switch in the car as a back up incase temp switch on engine doesn`t work. got this idea from some of our large trucks at work.

On top of the Thermostat we installed a temp switch to kick on the fan. got this from my indie. turns on at 212deg. or 100c and off around 80c what ever that is?

Temp switch is connected to #85 also or the same wire to the back up switch.

Your grounds will be the fan, the Temp switch on the engine, and the back up switch.

I had a plug that went to another temp sender on the thermostat housing. traced it down to a plug under the GP relay, then the a switch over valve behind the Brake Booster. went to something no longer in use, so used this wire.
I used 4ft long pieces of heat shring tubing to slip over the different colored wires, it hides them and it looks more professional.

I changed my sunroof over to manual, so will use that switch position for the back up switch. have to replace with a snap on/off switch, another PNP part.

Hope this helps?

also as far as an alternator, there are some writeups on the AL 129 X Bosch 115 amp. I picked up one at PNP on a 87 Saab for $14.35.
Had it checked out at Kragans. B+ voltage low 13.50 actual 14.66 high 15.20. looked like it was just put on as clean as it was.

I haven`t installed it yet, it`s in line behind some other projects.

I almost forgot, you will need a fuse for your power source for the fan. glad I reread this, reminds me I didn`t install mine.



Charlie ☺

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works