[Tigers] Radiator Cap

[Ron Fraser]

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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