986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - replace thermostat without replacing waterpump

Steve Tinker · 03-13-2011, 02:07 PM

Yes you can install the T'stat as per your step by step instructions.
If you're filling the system without a vacuum pump, I would flip the pressure release clip and drive for a couple of days with it open, topping up the coolant as required.

I mirror jmatta's comments exactly - replaced my T'stat 18 months ago but only changed my water pump in January this year.
Its no biggie, but most of the time is spent jacking up the car, draining and (especially) refilling the system....
If I had to do it again, I would replace all 4 componants (pump. T'stat, polyrib belt & Porsche coolant) at the same time - then I'm good for the next 3-4 years.

03-13-2011, 02:07 PM	#4
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	Yes you can install the T'stat as per your step by step instructions. If you're filling the system without a vacuum pump, I would flip the pressure release clip and drive for a couple of days with it open, topping up the coolant as required. I mirror jmatta's comments exactly - replaced my T'stat 18 months ago but only changed my water pump in January this year. Its no biggie, but most of the time is spent jacking up the car, draining and (especially) refilling the system.... If I had to do it again, I would replace all 4 componants (pump. T'stat, polyrib belt & Porsche coolant) at the same time - then I'm good for the next 3-4 years. __________________ 2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley. 2001 MV Agusta F4. Last edited by Steve Tinker; 03-13-2011 at 02:13 PM.