986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Rear boot carpet soaked and condensation on boot lid

Steve Tinker · 03-13-2011, 02:31 PM

Is it possible that your coolant bottle is leaking, either from the (blue) screw coolant filler, pressure relief valve or the plastic bottle itself - these are common problems.

The screw top part number should end in 04 which is the latest upgrade. A faulty cap usually causes condensation on the boot (er, sorry hood) lid.

Pressure relief valve is under the plastic cover held in place by the oil filler and coolant filler caps - if leaking you will see resedue around the 5 or 6 securing bolts.

To check the coolant expansion bottle, you must lift the carped and see if you have green or red coloured coolant laying around the bottom of the plastic bottle and under the carpet. You may not be able to see the crack in the expansion bottle as it usually breaks at the bottom and as soon as the cooling system pressures up, it forces coolant out. Repairs are not recommended - a new bottle must be purchased.

03-13-2011, 02:31 PM	#15
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	Is it possible that your coolant bottle is leaking, either from the (blue) screw coolant filler, pressure relief valve or the plastic bottle itself - these are common problems. The screw top part number should end in 04 which is the latest upgrade. A faulty cap usually causes condensation on the boot (er, sorry hood) lid. Pressure relief valve is under the plastic cover held in place by the oil filler and coolant filler caps - if leaking you will see resedue around the 5 or 6 securing bolts. To check the coolant expansion bottle, you must lift the carped and see if you have green or red coloured coolant laying around the bottom of the plastic bottle and under the carpet. You may not be able to see the crack in the expansion bottle as it usually breaks at the bottom and as soon as the cooling system pressures up, it forces coolant out. Repairs are not recommended - a new bottle must be purchased. __________________ 2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley. 2001 MV Agusta F4.