As Charlie points out, that big rubber o-ring under the cap seals it
quite well. The only opening after that is the end of the overflow
tube. My system has a piece of tubing connected at that point. It, in
turn, goes into the intake side of the MGB coolant tank. Closing the
valve on top of the tank would then cause it to be a closed, pressurized
system. But, I don't want that, so I leave the pressure cap open. Bud
Charlie Baldwin wrote:
> The TD radiator cap has a rubber o-ring that seals it pretty well.
> Actually it lies in the groove on the filler neck.
> I've also had no problems with a radiator in good shape. It heats up
> most when turning higher rpms on the highway, but stays well below
> boiling. Never a problem at lower speeds.
> Charlie
>
> mgbob@juno.com wrote:
>
>> One imagines that it could be done, but is it needed? Have you experienced
>> boiling of the coolant? Our TD radiators are quite large for a 1250cc
>engine,
>> and had no overheating problems during the years my TD was driven in
>> Florida.Bob
>>
>> ---------- Original Message ----------
>> From: JohnD<johnsfolly@gmail.com>
>> To: MG T List<mg-t@autox.team.net>
>> Subject: [Mg-t] Pressurized cooling system?
>> Date: Mon, 29 Nov 2010 11:06:20 -0500
>>
>> I've seen write-ups on fitting a coolant recovery system to the pre-TF T car
>> system.
>> Makes me wonder if anyone has converted a TD to a pressurized system? Maybe
>> sealing the radiator cap with with a rubber gasket and tightening it up and
>> then running a tank off the overflow with a low pressure cap?
>> Thoughts?
>> Thanks in advance.
>> John Deikis
>> --
>> Racing in the Past Lane!
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