986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Those of you with multiple water pump failures

Steve Tinker · 06-26-2013, 02:58 PM

Perfect... You may not have a coolant leak...
Did you drive with the coolant tank bleeder valve flipped open after the new pump was installed?
After replacing the pump / fluid it is advisable to open the bleed valve and leave it open for several heat cycles or for a few days driving - this usually gets rid of any small air pockets left in the system. If your mechanic used the manual way of filling the system (like I do as I don't have an Airlift) the chances of air pockets are more than even. Driving with the coolant tank showing full and the bleed valve opened usually results in the level dropping untill all the air is purged. Top up as required.

06-26-2013, 02:58 PM	#14
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	Perfect... You may not have a coolant leak... Did you drive with the coolant tank bleeder valve flipped open after the new pump was installed? After replacing the pump / fluid it is advisable to open the bleed valve and leave it open for several heat cycles or for a few days driving - this usually gets rid of any small air pockets left in the system. If your mechanic used the manual way of filling the system (like I do as I don't have an Airlift) the chances of air pockets are more than even. Driving with the coolant tank showing full and the bleed valve opened usually results in the level dropping untill all the air is purged. Top up 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.