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Old 03-13-2011, 02:07 PM   #1
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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.
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Last edited by Steve Tinker; 03-13-2011 at 02:13 PM.
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Old 03-14-2011, 01:33 PM   #2
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Thanks for all the great advice guys.

I guess I just didn't want to replace the water pump. Being a novice garage tech, I was just a bit intimidated by the belt replacement.

I never knew our OEM water pump with its plastic blade degrade over time and sends bits and pieces flying into the engine. I'll be looking to order a metal fan pump now though.

Does this look like the correct one I should order ( http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=996-106-011-55-M59&catalog_description=Water%20Pump%20%28requires%20o ne%20996-106-340-54-M30%20gasket%29%2C%20Boxster%2FBoxster%20S%20%2819 97-04%29%2C%20Each ) ?

Oh, and by BrandX coolant, I didnt mean cheapest flavor of the week at Kragen. I just didn't do enough research yet to know whats the best brand to use.
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Old 03-14-2011, 01:57 PM   #3
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There was talk a while ago about steering clear of the metal bladed water pumps.
If I remember correctly, its possible that if the pump bearings collapse it allows the metal blades to drop & wear through the alloy crankcase wall - you can guess the outcome of that.
My pump which was 10 years and 48,000 miles old when I removed it had no damage to the pump vanes and visually looked the same dimensions as the new pump. But costing only a couple of hundred dollars, I strongly believe that this type of preventative maintenance is a no brainer, considering the damage (not to mention the considerable inconvenience) of a failed water pump....
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2001 MV Agusta F4.
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Old 03-14-2011, 03:09 PM   #4
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Quote:
Originally Posted by Steve Tinker
There was talk a while ago about steering clear of the metal bladed water pumps.
If I remember correctly, its possible that if the pump bearings collapse it allows the metal blades to drop & wear through the alloy crankcase wall - you can guess the outcome of that.
My pump which was 10 years and 48,000 miles old when I removed it had no damage to the pump vanes and visually looked the same dimensions as the new pump. But costing only a couple of hundred dollars, I strongly believe that this type of preventative maintenance is a no brainer, considering the damage (not to mention the considerable inconvenience) of a failed water pump....
I didn't know that any of the water pumps were available with metal vanes. That confused me because American car makers have had metal vaned water pumps forever, and don't have any problems with the vanes breaking or bearings collapsing.

I'd just replace it every few years.

The belt is super easy. Put a piece of masking tape on it indicating which way it goes before you remove it though. You will likely have to trim the water pump gasket though. The Bentley manual tells you exactly how to do that.
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