Re: water pump impeller

Posted by Jim McPherson on April 13, 1997 at 21:58:42

In Reply to: water pump impeller
posted by Wayne Parker on April 13, 1997 at 21:02:47

:I recently rebuilt a waterpump.I used a new steel shaft and impeller and the thrust collar to control fan endplay.I did not pin the impeller to the shaft as Henry originally did.Is this necessary?In the worst case scenario, what could happen?What would the best way be to pin it?What would you use for a pin?The SNYDER'S catalog says there is no need to pin it.BRATTONS says it is best to pin."TO PIN OR NOT TO PIN? -THAT IS THE QUESTION"
You should pin the impeller to the shaft. In the old days when rebuild kits came complete you got a pin. You should drinn a hole through the impeller and shaft and install a soft steel pin which you peen on each end or a spring roll pin. I have used both. The problem is how far to press the impeller on? There is no "stop" or distance except the factory distance from the front of shaft to impeller and if you press it on too far you crack the impeller, which you may not see. Then it comes off while driving and the shaft has only one way to go, forward toward the radiator. This for piece of mind I pin mine. Good lock, Jim

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