Quote:
Originally Posted by rattlsnak
LOTS of threads on RL about this... The OEM plastic impellers get eaten away over time and dislodge and block vital coolant passageways and boom goes your engine. If the bearing fails on the metal type, it will score the block making it useless... Tough choice... If you go plastic, go with the 997 OEM part. Has a more robust plastic impeller.
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I’ve done probably 50 of these and haven’t seen one “eaten away.” They break when the impeller contacts block. Usually after a guy has been limping one along, adding coolant every so often instead of getting around to replacing it.
The new updated part is a 997 part number, I don’t think you can get old 996 part though some places may still have inventory.