> If not for that hole the leaked
> coolant would wash off the bearing lub and cause premature
> bearing failure.
The weep hole also warns you when the seal is leaking, instead of waiting until
the bearings fail entirely.
> Check the shaft diameter. My TR3 water pump went awry due to
> a sloppy fit
> between the pump shaft and the pulley.
Ditto. My opinion, if you can push the pulley into position by hand, you've
got a problem. It has to be a light press fit on the
shaft. I don't think I had anywhere near .030" clearance (before the failure),
but after the first tap the pulley fell into place
and the pump only lasted a few months before the pulley worked loose, tore up
the keyway and snapped the threaded portion of the
shaft. It missed the radiator, but I don't know how.
Used Loctite RC609 on the replacements. It's supposed to be able to create a
press fit with as much as .010" clearance (but they
were a nice tight fit anyway).
Randall
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