Fitting an XJ6 water pump

[Frank S]

I acquired a Stag for rebuild recently (not my first) and decided to change the water pump to an external one, without doing much research.... just based on what I wanted it to do and not do. I didnt want electric, its not in keeping with the car and I wanted to retain as much as possible. Ebay provided a couple of pumps and the XJ6 one looked OK. It is now in place where the aircon would have gone. Yet to fire it up....

[DJT]

Moved to general forum from Technical section. Can you add photos?

[Frank S]

Takes a bit of fiddling and plumbing. I also fitted a Defender header tank - more in keeping than the alloy/stainless ones. I can give more details of the plumbing if anyone is intewrested or would like to comment.

[singapore stag]

Very good! What did you do about the original pump, bunged? Will you be doing a full installation step by step guide with parts required list?

[Frank S]

I used a bung from Ward to block off the stag pump. I used the existing thermostat. I re-thought the circulation slightly to tee the header tank into the pump bypass inlet and vent the top hose into the tank. I retained the expansion tank, with its connection to the right radiator tank. The two tank system is widely used and makes a lot of sense. Other than that I used 15 and 28mm copper (much of which ended up as scrap as the plumbing got modified) lots of gas and solder, swearing and cursing. A 14" electric fan is positioned infront of the radiator, switched by a W1209 electronic thermostat sensing bottom hose temperature. There is a further thermostatically controlled alarm in the top hose plus a float switch in the header tank. Both go to a small unit in the cab giving visual and audible alarms of low oil pressure, low voltage, low water or overheat.
I have yet to test the system as the final touches of a full engine rebuild are being assembled. If it all works I will be happoy to give more details, but am really just inviting comments to point out likely problems before testing.

[jbuckl]

Very nice, Hope it works out.
Many owners have an external Waterpump low down nowadays, usually a Ford v6 pump.
often in the rh side alternator location.
Have seen a lovely diy conversion on the left side though, with super access.
Fwiw, original pump is fine with high / faithful / oem quality replacement parts…. That most ‘specialist’ suppliers don’t offer sadly…. Only one pump seal is worthy afaiaa.
All the rest seem to fit, but cause a much higher torque to turn, with pretty dire consequences soon after
If your triumph stag water pump needs a seal use a pioneer Weston one…PLEASE.

If you need a pump rebuilding with worthy parts, contact me via pm if to wish.
I’m not a business, just a member who had water pump issues & looked into it properly, (sp?) without slating the original design etc. then found out how to rebuild properly, (sp?) With good parts & assembly.