TA-TC 21 radiator pressure valve

For all cars made after 1945
Posts: 376
Joined: Mon May 21, 2012 10:14 am
Name: Richard Wallach
Location: Melbourne, Australia

TA-TC 21 radiator pressure valve

Postby RichardWallach » Fri Jun 05, 2015 11:44 pm

I am trying to ascertain whether Alvis had the spring loaded valve sitting on a rubber or fibre washer. RT believe that it may have been a fibre washer. Any comments as to what works best would also be appreciated.


lacey giles
Posts: 38
Joined: Mon May 21, 2012 10:55 am
Name: Giles Lacey

Re: TA-TC 21 radiator pressure valve

Postby lacey giles » Tue Jun 09, 2015 10:38 am

Mine had a very perished / crumbling rubber washer that I believe was original. It certainly did not work.

The rest of the valve was totally corroded and stuck fully open.

I made one good valve up out of 2 (rubber washer was missing though).

I found a fibre washer that would fit and used that and it has been fine now for a couple of years.

Giles Lacey

Nigel Griffiths
Posts: 7
Joined: Mon Jun 10, 2013 3:03 pm
Name: Nigel Griffiths

Re: TA-TC 21 radiator pressure valve

Postby Nigel Griffiths » Wed Sep 16, 2015 8:46 am

Perhaps late in the day, but my TC21/100 pressure release valve sits on the top of the radiator with NO washer whatsoever. I have been having problems with the coolant leaking out when the engine has stopped running. The problem was not the lack of a washer, but the fact that I had got the brass pressure relief valve in upside down. I returned from Goodwood revival on Saturday in the heat of the afternoon, and the next day checked the fluid level. Perfect.

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