Paul,
The way an OE TR waterpump is 'drilled for grease relief' is a little
confusing.
Since you can't make angled turns with a straight drill bit, the grease
relief path is made by drilling 2 paths that meet each other at around 90
degrees
inside the casting.
The hole you see near the impellor is simply access for drilling one leg of
the path and is properly blocked off by the gasket when in use. The excess
bearing grease travels through the first path, dead ends at the gasket, then
escapes through the second drilling to the outside orifice where you can see it.
PS; on the 'Non-grease zerked TR water pumps' you CAN grease them by using a
small rubber O-ring between grease gun tip and the tiny 'air breather hole'
located atop the cast neck (between the two bearings - remove pulley first).
It's a little harder to pump grease through these so called 'sealed bearings'
but
my bearings felt very slightly gritty before - and smooth as glass after.
Carl
'63 TR4 since '74
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When this waterpump is bolted up to it's housing (not shown in photograph) the
gasket (shown) DOES NOT have a hole for the grease to be distributed to the
waterpump internals. If this is so then why does the cast iron pump (as
shown) have a grease fitting (as shown) which has a hole(out of sight but on
the inside next to the impellar fins) for the grease to come thru but then
stop at the gasket (shown).
Thanks, Paul Dorsey
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