986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Replacing the Jägermobile Water Pump Again!

Steve Tinker · 05-13-2013, 03:33 PM

A lot of people confuse "burping" air manually out of the cooling system by just running the engine for a few miles, which is incorrect.
Ridding the closed system of unwanted air pockets require several heat cycles with the vent valve lifted open. The engine must reach normal operating temp with the thermostat fully open, and then let the coolant cool to ambient temp. This "cycle" must be repeated at least 3 times (still with the vent valve open) to rid the system of air, with topping off the level of the coolant as required.

05-13-2013, 03:33 PM	#15
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	A lot of people confuse "burping" air manually out of the cooling system by just running the engine for a few miles, which is incorrect. Ridding the closed system of unwanted air pockets require several heat cycles with the vent valve lifted open. The engine must reach normal operating temp with the thermostat fully open, and then let the coolant cool to ambient temp. This "cycle" must be repeated at least 3 times (still with the vent valve open) to rid the system of air, with topping off the level of the coolant as required. __________________ 2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley. 2001 MV Agusta F4.