Thermostat

 

 

Remove the two 12mm bolts that hold the top thermostat housing to the intake manifold. On turbo models, disconnect the AAV hose from the intake manifold. Remove the AAV and thermostat housing as one unit. Scrape away any old gasket material. Remove and inspect the thermostat, boil it in water to see if it opens at its specified temp. It’s always a safe bet to replace with a new unit.

 

 

Whats the AAV?

 

Thanks

Auxiliary Air Valve

 

controls idle speed during warm up

on MPFI fuel systems

 

Idle speed regulation on an FI engine

is basically a controlled

vacuum leak - this is the control unit.

auxiliary air valve

 

You must have a Turbo car. On the Turbo car with the Multi Point Fuel Injection the AAV is built on top of the Thermostat. To get to the Thermostat itself you are taking off the AAV. It has an electrical plug on the top of it and a hose to the intake manifold on one side and a hose to the intake air hose (pre turbo) on the otherside.

 

Keith

someone once told me that was the coolant temp sensor. if its not wear is the coolant temp sensor loacted at.

 

Kevin

the CS is also on the goose neck housing

 

see the other post where you asked this