Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
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smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
This is only the 2nd time I've had the water pump off in 40+ years but the first time I noticed the hole in the bottom (see pic). I think the pump may be a replacement cause there's no grease zerk on top ( or even a place for one) that all the illustrations I've seen show on an original. Not concerned about it cause it's obvously there for a reason, I just don't know what that is. Is it to shoot some sort of lube into the pump? Should there be a plug of some type in it that's gone missing? It's not threaded.
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TR4/4A water pump mystery hole
- Thread starter Dash
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Merlin63Tr4
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That is called the "weep hole".
The "weep hole" is there to allow any accumulated coolant to drain out of the WP housing and to protect the WP bearings from coolant contamination/damage.
If the WP seals fails, coolant will run out this hole, and it is time to replace the pump....
M.
The "weep hole" is there to allow any accumulated coolant to drain out of the WP housing and to protect the WP bearings from coolant contamination/damage.
If the WP seals fails, coolant will run out this hole, and it is time to replace the pump....
M.
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