Re: Impeller incherchangable
I don't know part numbers BUT it depends upon the year of the engine. Up to 1978 all three and four cylinder Chryslers used the same impeller. From 1979 to 1988-89 Chrysler and force engines used a larger impeller that again was the same for all three and four cylinder engines. From 89 to about 94 a mercury water pump was used and after 94, a mercury lower unit and water pump was used.
If you are thinking about re-using an impeller from a different engine---DON'T!---At less than 30 bucks each, a new impeller is worth the safety and piece of mind. It is false economy to re-use an impeller. Used ones can fail unexpectedly and then you not only overheat, but need to be towed and need to replace it again, not to mention possible engine damage.
