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Fan clutch delete and a4 1.8t alternator upgrade on passat b5.5 1.8t

4.2K views 2 replies 2 participants last post by  jess-fox  
#1 · (Edited)
Got the fan clutch deleted and managed to fit a 14inch universal fan, created a wiring harness and used the fuel pump trigger to turn on the relay for my new fan.

For the alternator I got a 2004 audi a4 1.8t 150amp and replaced the oem 1.8t accessories bracket with the a4 (recommended to use the braket bolts from the a4 to bolt the new accessories bracket) for the belt, you can use the same size as the one on the vw jetta 1.8t non a/c instead of the k06 has to be a k05 to match the 5 ribs (one sided) harmonic balancer on the passat. U can use the original power steering pump from the passat and the original belt tensioner from it to be a perfect fit.

There's going to be a little clearance issue between the fan and the power steering pulley "they might touch when the car is in reverse" the solution i found for this is to tilt the radiator forward by cutting and rotating the upper rubber mounts located on the top of the radiator. That will give at least a ½ or 1 inch space.
(Lower profile fan might help better)

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#2 · (Edited)
That's great! I was wondering if that whole bracket was transferrable. Now we know.

You can use a slimmer low-profile fan to avoid moving the radiator. I think mine is a Spal fan.

I ran main power for the relay to the battery, and the trigger for the relay to the aux fan. It won't kick on until the temp gets over 200 or whenever the A/C is running.
 
#3 ·
I ran main power for the relay to the battery, and the trigger for the relay to the aux fan. It won't kick on until the temp gets over 200 or whenever the A/C is running
About that fan relay system, im designing a new system that will run both fan's automatically better. Currently I have a mk4 jetta fan switch on my radiator and it fits perfectly on it, I'm waiting to get the connector and I have an extra harnes for the oem auxiliary fan which i will be using it for the primary one. im trying to makes this look and be as oem looking as posible.
Thanks for letting me know about the lower profile fan. I had to go with this one because the car is my daily and there's too little time to do modifications