Water pump (2.25 engine) sprung a leak, so I dismantled it and fitted a new seal. Before trying to remove the impeller I applied a bit of heat with the gas torch just to encourage removal. The impeller had two threaded holes (1/4" UNF) in it for removal. I made up a "puller" to do the job. The threads in the impeller were rather rusty and gave in when I put some tension on them. I drilled them out to a larger size and then tapped them with 5/16 UNF. The impeller glided off freely. The face on the impeller where the seal runs was grooved, hence the leak.
Cheers, Mick.


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