Pulley sizes

[xlr8or]

If you are using the serpentine system is it still turning the water pump in the same direction as stock? Your pump is the standard rotation.

Some serpentine system spin the water pump the opposite direction. This will definitely cause overheating issues.

[Tongue Pirate]

Good point!

[392cobra]

Tim,
Right now you are 13 % overdriven.Tom's stock pulleys are 17 % overdriven.
Your serpentine system is for a standard rotation pump.

As I said before,I have been fighting the same battle after getting my KC.Been dealing with it for a year now.
I'll tell you the steps I went thru and ended up lowering it 20*. Maybe something in it will help you.

This is all in city traffic,stop & go.Tempts in low-mid 80's

1. 200-205* 180* thermostat
2. Installed new Moto-Rad 180* thermostat , no difference
3. Replaced WP pulley. From 12% underdriven to 5 % overdriven. Lowered 5* to 195-200*
4. Gutted old thermostat. 1 1/8" opening.LOWERED tempt 15*. Now 180-185*
5. Removed gutted thermostat and install 1" restricter plate. Raised 5* to 185-190*.

6. Put bleed hole in gutted thermo and reinstalled.
Now 180-190* with tempt in mid-80's.

[Tom Wells]

Ooops!

Just remembered I have a photo of the belts:



And yes, the pump is a standard rotation pump.

Hope this helps clear things up

Tom