Had this car about a year or so and been doing deferred maintenance at a slow pace. So, time for a water pump on my 996.2. Surprisingly found 1 impeller blade broke off part way. Is there a way to back flush coolant passage ways in head...? As the blade piece/pieces could be lodged in a small coolant passage. Or does it matter on a 996.2 as seems only the 996.1 have the head crack/impeller blade problem...? 37,000 miles on car, probably all original as gasket was never cut off. Engine runs cool, right on the middle of 0 never seems to budge off that 0. and that was with the original �180 t-stat and pump. JFYI, car has a complete FabSpeed Exhaust from previous owner, way to loud @ full throttle imo. What a pia, can't get engine mount bracket pushed far enough back to clear water pump as the cat pipes hit the bracket. Have to take off pipes to do water pump.
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YOUR RESEARCHWhat to do, busted impeller blade....
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How does the pump bearing feel? As far as I know the impeller breaks because the bearing wears and allows too much shaft play, the impeller is close to the block and runs a tight clearance. Are there marks on the block where the impeller ground against it? Incidentally 37k miles is low for a pump fail. It could be with it's age coolant has migrated through the bearing and accelerated the failure
Quotes source post: 19656678
Ya, thats what I thought also... Pump bearing does feel just a little ruff, with no discernible play. Only drive it once a week or so for a short blast of probably 20-30 miles or so. Got this car for the little Lady to drive. But she won't drive it till I get the door locks/key fobs working. Thats another story in itself as car came with 1 Audi key no buttons. Put the key in the door lock and it just spins free...lol. Car is a work in progress.. . Nope, block looks good, no damage/marks. Was the oem Porsche pump with plastic impeller.
@allcool , sorry to hear about the blade. Hopefully this post helps to bump the thread in front of a couple of guys that have been thru this. Skip may see this and may have some suggestions. I have heard about folks flushing the system and others removing the heads to go fishing for it. But it's just second hand talk and i dont know the outcome. If you can, please keep us posted on what procedures you hear about and try.
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