Here's the plan, have an aftermarket VDO water temp electric sender. I took out the aux cooling fan switch on the '90 motor and measured the size of the threads--it's a 16mm x 1.50 pitch. The thermostat housing could be tapped for a 1/4NPT-18, which is one of the adapters I have with the VDO kit.

So I'd tapping a hole in the thermostat housing where the stock aux fan switch would go, because my car doesn't have a stock aux fan.

Is this hole the same for the S4 and S5 motors? Any tips on tapping it?

Does this sound good?

 

Didn't try that on mine, I went with using one of the unused airpump bolt locations, drilled and tapped that out, and installed the 1/8NPT sender in there.. Works like a champ

I suppose your way would work ok too.

PaulC

 

thats where i put my sender. its pretty easy though, all you need to do is take it off to drill it out. easy as that!

 

I used the t-stat housing location also. Works great.

 

did all of you guys put it in the same spot on the t-stat housing? As in the aux fan switch spot?

 

mines in the front cause I got a aux fan

 

very cool You get bonus points for the pic!