Discussion
When mine got damaged I contacted TVRCarparts and was told there are 4 variants listed for the Serp engine...From what I could make out mostly the variation is in the direction and angle of the top outlet.
So make sure it matches the original. Mine has a curved swan neck that you can't get (new at the time, and none of the breakers had one) so had mine welded up.
So make sure it matches the original. Mine has a curved swan neck that you can't get (new at the time, and none of the breakers had one) so had mine welded up.
I had mine welded but it still leaked as the joint internally couldn’t be cleaned adequately and it left pin holes. I managed to seal these with the super steal version of araldite. If you can get the tank into an ultrasonic cleaner first it might weld better.
The cause I believe is that brass plug gets to tight and force needed to remove it fatigues the weld. I’ve replace mine with a standard brass domestic radiator hex head plug from B&Q (same thread form) and an O ring from the same isle. It has a flat mating face instead of the recess the O ring is squashed between the two faces and seals better on the tank face and doesn’t need to be tight, just nip up. Had mine on for a couple years now and no leaks.
Cheers,
Simon.
The cause I believe is that brass plug gets to tight and force needed to remove it fatigues the weld. I’ve replace mine with a standard brass domestic radiator hex head plug from B&Q (same thread form) and an O ring from the same isle. It has a flat mating face instead of the recess the O ring is squashed between the two faces and seals better on the tank face and doesn’t need to be tight, just nip up. Had mine on for a couple years now and no leaks.
Cheers,
Simon.
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