[Fot] TR3-4 water pumps

[Tim Murphy]

On our TR4 we had a 6 blade water pump and the shaft was turned down to
5/16-18 inch for the threaded end for the nut to hold the pulley on.  This
stub threaded shaft broke off, we overheated and cracked 2 liners.  I
replaced it with the 4 vane pump from Moss which has a 1/2 inch diameter,
12mm pitch thread to hold the pulley on.  It came with a Nylok nut but the
threaded portion is too short to engage the Nylok.  It's on my To Do list to
contact Moss for a spare 1/2 inch diameter, 12mm pitch nut!!  We noticed no
difference in cooling performance with the 4 vane versus the 6 vane.  And
the end of the shaft of the 4 vane didn't break off!

Tim

-----Original Message-----
From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On
Behalf Of John Wagner
Sent: Wednesday, April 21, 2010 2:57 PM
To: Fot at autox.team.net
Subject: [Fot] TR3-4 water pumps

Can anyone tell me why I should or should not buy a 6 blade water pump? Do
they flow more water then standerd 4 blade?

Thank you
John Wagner
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