986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Ugh.... I Need Some Help Identifying a Coolant Leak

Steve Tinker · 05-01-2015, 11:24 PM

Chuck = assuming you have got air in the system, a quick check is to lift the chrome D ring on the pressure relief valve (pic #3) and drive the car for a couple of (complete) heat cycles with a drive of +/- 20 minutes. The open valve will allow air to be expelled without the coolant. Be prepared to top up the coolant bottle when the system cools down.
If you have purged the air and it still vents out then you will have to investigate further, but my experience tells me that once the air is out, you should be OK.
How the air got into the system is questionable, but possibly from your leaky old cap....

05-01-2015, 11:24 PM	#8
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	Chuck = assuming you have got air in the system, a quick check is to lift the chrome D ring on the pressure relief valve (pic #3) and drive the car for a couple of (complete) heat cycles with a drive of +/- 20 minutes. The open valve will allow air to be expelled without the coolant. Be prepared to top up the coolant bottle when the system cools down. If you have purged the air and it still vents out then you will have to investigate further, but my experience tells me that once the air is out, you should be OK. How the air got into the system is questionable, but possibly from your leaky old cap.... __________________ 2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley. 2001 MV Agusta F4.