[Tigers] Radiator Cap

[Joe Brown]

Thanks Ron, the .805" dimension sounds like what I need.

On Tue, Jul 27, 2021, 6:37 PM Ron Fraser <rfraser at bluefrog.com> wrote:

> Joe
>
>                 I believe I bought my radiator cap from Sunbeam
> Specialties.
>
> Cap indicates 9 lbs. and G630.
>
> Rubber seal to rubber seal is .805”.
>
> I installed a catch bottle for the header tank overflow.   Catches any
> overflow which gets sucked back in when the engine cools.
>
>
>
> The Parts lists indicates 9 lbs. later cars and 13 lbs. early cars.
>
>
>
> Tiger, An Exceptional Motorcar indicates B382001521 as last unit with
> early header tank and 9 lb. cap – B382001522 1st Tiger with updated
> header tank and 13 lb. cap.
>
>
>
> Well, no really good help there.
>
>
>
> I’m thinking 9 lbs. for early cars and 13 lbs. for later cars is correct
>
>
>
> Ron  Fraser
>
>
>
>
>
>
>
> *From:* Tigers <tigers-bounces at autox.team.net> *On Behalf Of *Joe Brown
> *Sent:* Tuesday, July 27, 2021 6:07 PM
> *To:* Tigers Den <Tigers at autox.team.net>
> *Subject:* [Tigers] Radiator Cap
>
>
>
> Hi,
>
>
>
> I'm hoping one of you guys can tell me what radiator cap I should be
> using.  I've tried a cap that was listed as being for a Tiger on Autozone's
> website but I think the pressure spring part under the cap is too short.  I
> almost immediately start getting water out of the overflow tube as the
> engine warms up.  I measured the depth of the expansion tank opening from
> the top edge to the flange where the spring part of the cap would sit and
> got .777".  I measured the cap from the big rubber seal just under the cap
> to the small rubber seal at the end of the spring and got something like
> .75".  So it looks like I need a cap with a longer spring stem.
>
>
>
> A brand name and part number would be great.  And also, what should the
> pressure rating be?  What I have is 13 lbs.
>
>
>
> Thanks,
>
> Joe Brown
>
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