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Wedge tr7 water pump

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philman

philman

Jedi Knight
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I'm thinking that the 12 vane waterpump on a TR7 is a direct replacement for the 6 vane water pump without having to change to the newer waterpump cover. I need to keep the older style waterpump cover and intake manifold to use with my HS6 carburetors. Am I correct? I have a spare 12 vane waterpump and that would cut the down time when replacing if they were directly interchangeable.
 
The twelve vane pump will not intercahnge with the six blade pump without changing the pump cover/housing. The angle of the impeller blades are different.

Alan T
 
A 6 vane water pump cover WILL work with a 12 vane water pump. I have been running this set up for 2 years on my 78 FHC. The FASD was acting up on my car so I swapped the carbs and intake for a manual choke setup off of a 76 FHC. I needed the 6 vane pump cover for the 76 intake manifold. Just make sure there is no interference between the pump cover and the water pump bolt. I used a little dab of modeling clay to check for interference. I also used the thickest water pump cover gasket during the assembly process
 
Could always use two gaskets if spaceing is an issue.
 
i have two extra gaskets, i thought that others had done this already and might have had to overcome obstacles.
 
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