Dismantling Rover 12 water pump

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JohnG
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Joined: Thu Jul 02, 2020 5:44 pm

Dismantling Rover 12 water pump

Post by JohnG » Thu Jul 23, 2020 10:43 am

I'm in the process of dismantling the water pump on my 1946 Rover 12. I've got to the point where the service manual says "lift out the Thermoflex seal" but I can't shift it. It rotates reasonably freely on the spindle but will not come off it and I'm wary of damaging the seal by applying too much force. Has anyone else encountered this problem and found a solution? Thanks.

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luli
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Re: Dismantling Rover 12 water pump

Post by luli » Sat Aug 08, 2020 1:05 pm

I assume you already removed the back of pump (p.n. 133 in the lay-out, see link). With the pulley in place, and using a cloth, put it in a vice and tighten carefully. Apply a lot of DW40 on the 3/8 BSF nut and release it. The thermo flex seal will come out, most probably in a bad condition. See more here https://wp.me/pXLKy-1sB
Rover 10 1946 RHD
Rover 10 1947 LHD
Rover 12 1947 tourer LHD
http://lulisml.wordpress.com/

JohnG
Posts: 14
Joined: Thu Jul 02, 2020 5:44 pm

Re: Dismantling Rover 12 water pump

Post by JohnG » Sun Aug 09, 2020 8:53 am

Thank you Luli. I managed to get the seal off in the end. The edge of the carbon base is slightly chipped but otherwise it is intact so I am hoping I'll be able to use it when I put the pump back together as I have been unable to find a replacement.

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luli
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Re: Dismantling Rover 12 water pump

Post by luli » Sun Aug 09, 2020 9:08 pm

Have you tried Mike Couldry or Mike Evans? both used to have a substitute until their supplier retired, but may be they found a new one. Test the seal in boiling water to verify that it expands and not leaks. Also make sure that that both surfaces are smooth and perpendicular to the axis otherwise the pump will leak. Keep looking for a good one, sometimes they pop up out of the blue. https://wp.me/pXLKy-2VU
Rover 10 1946 RHD
Rover 10 1947 LHD
Rover 12 1947 tourer LHD
http://lulisml.wordpress.com/

JohnG
Posts: 14
Joined: Thu Jul 02, 2020 5:44 pm

Re: Dismantling Rover 12 water pump

Post by JohnG » Mon Aug 10, 2020 10:04 am

Mike Evans doesn't have any but will try asking Mike Couldry. Thank you very much for your advice. Much appreciated.

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