Ok, my clutch fan has been showing signs of self destruction! I was just going to replace it, but I have not done anything lately, as far a modification & you know me, I love working on my car..........this will be a good Saturday project & I wanted to get it done before my surgery 2 weeks from now......
As for the modification, all your modern day Bimmers have done away with the mechanical fan, & all have electric fans. I thought about just doing a fan delete mod, but rather have the safety of 2 electric fans, I found this electric fan DIY which I will be following.....
I will be using a 16" Spal Electric pull fan with skewed blades and a airflow rating of 2070 (CFM's) , manufactured in Italy a very good quality fan......also had to purchase the fan wiring relay kit & metal brackets. from The Fan-Man
Yeah......it was like the BMW GOD's were calling to me, I was driving my car on the highway one day last week, & the engine sounded slightly louder, especially during acceleration, it definitely sounds like the mechanical fan.....I remembered reading some E36/E39 threads & the horror stories about the clutch fan exploding, propelling fan blades all over the engine compartment, into the radiator & up into the hood.......
So, I get into town & I am stopped at a light, I look to my left & to my surprise there is an E39 parked with hood dents coming up through the hood right in the area of the clutch fan!
So, I am finished with my Spal E-Fan installation, all in all, it was pretty simple.
It took roughly 3 hours. Prep & install......I have it wired into the low temp. side of the coolant switch (91 degrees). There is a high temp. side to the coolant switch which is set to turn the fan on when the coolant reaches 99 degrees, but I opted to run it on the low temp. side, just to play it safe! After running to operating temp. temp. gauge dead center, with the outside temp. at about 60, the electric fan came on just once........everything is operating as designed!
There was about an 1.5 inches of clearance between the water pump pulley/shaft and the fan motor.
Fan relay & 12 volt power source location.
Fan harness ground, fan connector & coolant temperature switch connection location.
I decided to leave the stock radiator shroud in place, because the Coolant reservoir is mounted to it.
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