• Hey Guest!
    British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)
Tips
Tips

TR2/3/3A TR-3A Water Pump Question

Share this page

angelfj1

angelfj1

Yoda
Country flag
Offline
Need help. We ordered (and received) an upgraded water pump from a supplier in England. This pump has a different impeller (5-vane). It is claimed to deliver better flow and enhanced cooling. (we will see???) I did this because I wanted to use an original radiator with the hand-crank hole. Having the hole reduces cooling because some of the tubes are closed off. The theory was for the enhanced water pump to make up the difference. Here's the problem. The pump arrived without a pulley. The instructions say that the original pulley may be used. The original pulley was an interference fit onto the original water pump shaft. The new shaft is undersized to the point that the pulley easily slides over the shaft. I understand that another arrangement was used where the end of the shaft was threaded to take a nyloc nut. Does anyone have a suggestion? :eeek:
 
Apparently, your original pump is an aftermarket style that came with a pressed-on pulley. That type of pump has an integral bearing/shaft assembly, as opposed to the original type that has seperate shaft and bearings, along with a locating key and threaded end to hold on the pulley.

Unfortunately, I think your only recourse is to get a pulley that fits an original pump. Let me look around, I may have an old pump with a pulley, as I changed over to a narrow belt.

Edit: I just checked at Moss, and they list one for about $30 if you want to go that route.
 
Back
Top