Boogie850, what's the mileago on your car when replacing the water pump? Yesterday, I tried to install a new water pump. But, I could not remove the tensioner pulley mounting T45 since I can't put a T45 socket and 3/8" drive ratch in a limit space (since my s80 has a 6 cylinder engine, there may be more space on a 5 cylinder 850). I will get a small air ratchet next time to remove this T45. I think you can sell your specialized T45 bit on Ebay auction.
Anyway, I checked out the water pump condition, and it was still strong (I compared it with a new GEBA water pump (made in Germany, bought at FCPgroton). I replace all new idler pulley, hydraulic tensioner damper, serpentine belt tensioner, timing belt, serpentine belt, and 4 vibration damper bolts. Althoug the idler pulley was still as good as a new one, I installed a new one since it was very cheap.
I think the serpentine belt tensioner needs to get an attention. I can hear the plastic belt roller bearing sound when I couldn't hear any sound from idler pulley and tensioner pulley. My car mileage is about 102K miles. Thanks.
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