[TR] TR3 water pump question

Dave1massey at cs.com Dave1massey at cs.com
Wed Oct 30 17:24:43 MDT 2013

That is a drain hole for what coolant weeps past the seal.  The hole lets 
it drain away before hitting the bearing.  If not for that hole the leaked 
coolant would wash off the bearing lub and cause premature bearing failure.

Check the shaft diameter.  My TR3 water pump went awry due to a sloppy fit 
between the pump shaft and the pulley.  When I mic'd the shaft and hole 
there was a good .030 clearance.  The key kept things tight for a while but then 
it wore down and the pulley started to wobble and rub on the bolts and pump 

The pump was new, the pulley was old (although I cannot vouch for it being 


In a message dated 10/30/2013 5:36:00 PM Central Daylight Time, 
auprichard at uprichard.net writes: 
> Came across what looks like a decent water pump in a box of parts 
> acquired
> with a TR3.  The water pump has a hole at the base, but no grease fitting.
> I know the original pumps took a grease nipple, but I didn't think the
> replacement pumps did.  My question is do the later (non-grease-nipple)
> pumps have a hole, and if so, for what?

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