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Ditto everything Str*Razr said. Unless the prior owner can provide you with proof of water pump replacement, replace it and the various other items that go along with a change of the water pump. I look at water pumps as having a TBO of max five years. The plastic impellers go through X number of heat cycles and age as they sit in water and gylcol. My 997 was made in 2008. I have put two water pumps on it. Both timed out at five years. At five years they looked like crap. I checked the water pump impellers and they were brittle, probably would go another two years but not worth the risk. I'll be installing a new water pump Spring 2023.
Also, I forgot about transmission and front transfer case fluids. Change them every 50k miles. And for piece of mind at your next oil change get an oil analysis done and interpreted by a Porsche Certified Mechanic. Oil analysis will tell you what is going on inside the engine.
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2008 997 C4S Silver, Kitty Cat, 1989 3.4 911 Silver Carrera, Erica, 1989 944S2 NASA GTS2, Iris, 1988 944 DE Car, Backdate 1975S to 1970s w 3.0 PMO - Roxanne, 1967 911 normal w 2.2s engine w S goodies, 89 VW Cabriolet - 2.0 conversion - sold and missed
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