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Steve Tinker · 04-10-2015, 02:04 PM

Ant.... assuming that you installed the water pump & T'stat correctly, there could still be an air pocket in the system.
As a quick check that there is no trapped air , flip up the expansion tank release valve - its a chrome half ring mounted on top of the tank. Move the ring into the vertical position and leave it there for at least 2 -3 heat cycles. After each run, let the car cool completely and then check the volume of coolant in the tank - if it drops then there is a good chance you had an air pocket.
After the 2 - 3 heat cycles the level should stabilise. You can then return the valve to its normal position.
Note: A heat cycle is not driving round the block, its driving for at least 5 miles or so to get the T'stat fully open.

04-10-2015, 02:04 PM	#2
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	Ant.... assuming that you installed the water pump & T'stat correctly, there could still be an air pocket in the system. As a quick check that there is no trapped air , flip up the expansion tank release valve - its a chrome half ring mounted on top of the tank. Move the ring into the vertical position and leave it there for at least 2 -3 heat cycles. After each run, let the car cool completely and then check the volume of coolant in the tank - if it drops then there is a good chance you had an air pocket. After the 2 - 3 heat cycles the level should stabilise. You can then return the valve to its normal position. Note: A heat cycle is not driving round the block, its driving for at least 5 miles or so to get the T'stat fully open. __________________ 2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley. 2001 MV Agusta F4.