Water Pump Housing Question
 

Does the S5 water pump housing have the three bolt threads at the thermostat outlet? Is this the only difference for the s4 and s5 water pump housings?

Does anyone here own an S5 TII...?

Does anyone know what the difference is between the s5 and s4 housings? I bought a supposedly s4 housing from someone, but my coolant neck has two bolts and it looks like it requires 3, so is it an s5? Will it work if I also buy and s5 thermostat outlet neck or are there other differences that require other parts also?

the S5 tstat housings have 3 bolts, the S4's have 2.

also, the housings have a completely different bolt pattern for both the Tstt housing and water pump. you need ALL s4 parts to work with.

edit- the S5 TII housings are different from the S5 na housings. i belive the back water nipple goes to the turbo and the na one's go to the BAC(i THINK)

s5 ones have 3 bolt and a plastic neck while the s4s are all metal. You cant fit an s4 neck on there without the rest of the s4 waterpump assembly.

The S4 water pump housing is useless to you unless you're going to change over to an S4 water pump too.


-Ted