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gsmiller

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  • From
    Bay Area, California, USA
  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    2002 Boxster S
    2004 911 C4S

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  1. gsmiller
    Well for anyone that's curious, I did check with my mechanic today and the 997 pump was in fact original on my M96 engine (the gasket hadn't been snipped and the markings on the engine housing and pump matched far too well to be a replacement). So there you have it: 997 pump factory installed on a late 2004 M96 3.6L motor.
  2. gsmiller
    Just call Sunset Porsche parts department and give them your VIN. They can tell you with certainty if that part is meant for your car. That's a good idea. Thanks!
  3. gsmiller
    Thanks Loren; super helpful! I've been searching for a while tonight trying to get to the bottom of this. I'll check with my mechanic tomorrow if he had to snip the gasket since I'm really curious if the factory installed the 997 part or if it was done at some point.
  4. gsmiller
    Following up on the earlier points related to water pump interchangeability between the M96 and M97 engines: Today my mechanic changed the water pump on my 2004 C4S. The water pump on the engine looked to be original by the way the metal housing matched the engine. When he pulled it off, it turned out to be a 997 part. He replaced it also with a new 997 part. Can anyone confirm if the 997 part truly fits my M96.03 engine (code appears to be M96/0366408776)? Does it make any sense that the factory would have installed a 997 part on the engine, or is it not likely the original water pump? My mechanic's theory was that the engine was replaced in the car, and that there was a transitional phase where some 997 parts were used on M96 engines. Thoughts on this theory? Would love to get to the bottom of this. Thanks!
  5. gsmiller
    I wonder if the belt chirping is due to coolant leaking onto the belt. Could probably happen from the expansion tank or from a failing water pump. I had the water pump completely fail on my Boxster S and it caused belt chirping initially, puffs of smoke, then a very wet driveway when I shut off the motor and a bunch of coolant decided to come out from the bearing on the pump. It's worth investigating and possibly replacing the pump while you're at this. I'm sure you've read up on the pumps. Best case scenario, you have a factory unit in there with the plastic impeller. As you probably know, they can toss bits of plastic into your motor over time as the age. Worse, you could have a replacement unit with metal impellers. If it fails, you don't want that metal grinding on your case. FWIW, I'm replacing the water pump on my newly acquired '04 C4S as a preventative measure since it's actually the original part with ~94k miles on it. Interested to see what they diagnose this as. Even if it is the coolant reservoir tank, if you have to flush the coolant anyway, you might seriously consider doing the pump while at it. Just my two cents. Good luck!
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