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If you are not trying to win a concours award and just want to drive
your Tiger..<br>
What you need nowadays is a recovery system.<br>
<br>
Pics show my system I bought at an auto store in the early to mid
'90s, not sure if they still have such things...<br>
<br>
You want a cap with two rubber seals, length of the spring should
not matter as long as it is long enough, the Tiger<br>
seems to be right in line with all the other radiators in this
regard. I mounted the tank under my fender above<br>
my also re-located oil filter.<br>
The system insures that the top of the radiator is full unlike the
stock system and keeps any leakage off the track<br>
or out of the mouths of small animals.<br>
<br>
13lb works fine for my two early MK1s.<br>
Garty<br>
<br>
<br>
<div class="moz-cite-prefix">On 7/28/2021 5:11 PM, jimdamelio via
Tigers wrote:<br>
</div>
<blockquote type="cite"
cite="mid:20210729001536.2F0A7A1019@autox.team.net">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<div dir="auto">Attached are pictures of the 9lb cap 5220487, 13lb
cap 1224818 and a 13lb chrome Motorcraft cap. The 9lb cap
measures 1" from inside base to tip of plunger while both 13lb
caps measure 1-1/8". </div>
<div dir="auto"><br>
</div>
<div dir="auto">Jim D</div>
<div dir="auto"><br>
</div>
<div id="composer_signature" dir="auto">
<div style="font-size:85%;color:#575757" dir="auto">Sent from my
Galaxy</div>
</div>
<div dir="auto"><br>
</div>
<div><br>
</div>
<div dir="auto" style="font-size:100%;color:#000000" align="left">
<div>-------- Original message --------</div>
<div>From: Joe Brown via Tigers <a class="moz-txt-link-rfc2396E" href="mailto:tigers@autox.team.net"><tigers@autox.team.net></a> </div>
<div>Date: 7/28/21 6:49 PM (GMT-05:00) </div>
<div>To: Ron Fraser <a class="moz-txt-link-rfc2396E" href="mailto:rfraser@bluefrog.com"><rfraser@bluefrog.com></a> </div>
<div>Cc: Tigers Den <a class="moz-txt-link-rfc2396E" href="mailto:Tigers@autox.team.net"><Tigers@autox.team.net></a> </div>
<div>Subject: Re: [Tigers] Radiator Cap </div>
<div><br>
</div>
</div>
<div dir="ltr">Just to add to my confusion I took a look at the
Tiger Parts List Supplement (pub number 6601131) and I'm
guessing this only covers the Tigers up to
B382001521 because it only shows the 1224725 header tank and Ron
has
Parts List 6601334 which show two more tanks. Parts List
6601131 says the 9 lb. cap is for "later" cars and the 13 lb.
cap is for "earlier" cars. This seems to contradict what is in
TBON. Is it possible that some of the earliest cars had 13 lb.
caps and then they went to 9 lb. caps until they changes the
header tanks?
<div><br>
</div>
<div>The Rootes part number for the 9 lb. cap is 5220487 and
when I Google that number I can see that is also a Mopar part
number from back in the day. All of the usual sources want to
cross this over to a 13 lb. cap. I did find a 9 lb. cap made
by Motorad but I can't find what the stem length is. I guess
I will have to go down to the different part stores and look
at what they have. </div>
<div><br>
</div>
<div>Sunbeam Specialties has three different caps for sale but
they are for Alpines, not Tigers. I asked Rick if any of them
would work for the Tiger and he said the pressure rating was
too low. </div>
<div><br>
</div>
<div>Ron, the G630 cap pulls up as a match for some older Land
Rovers but I'm only finding used ones.</div>
<div><br>
</div>
<div>If anybody has recently purchased a new cap that is working
fine please let me know what you got.</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Joe Brown</div>
</div>
<br>
<div class="gmail_quote">
<div class="gmail_attr" dir="ltr">On Tue, Jul 27, 2021 at 8:40
PM Joe Brown <<a href="mailto:jbbrown1980@gmail.com"
moz-do-not-send="true">jbbrown1980@gmail.com</a>> wrote:<br>
</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px
solid rgb(204,204,204);padding-left:1ex" class="gmail_quote">
<div dir="auto">I pulled out my copy of TBON and he also
listed a 9 lb. cap up to B382001521 and 13 lb. after that
<div dir="auto"><br>
</div>
<div dir="auto">I sent an email to Rick at SS to see if his
part number RC5 is the cap you described. It doesn't say
it's for the Tiger, it just says it's for the series V.</div>
</div>
<br>
<div class="gmail_quote">
<div class="gmail_attr" dir="ltr">On Tue, Jul 27, 2021, 8:27
PM Ron Fraser <<a href="mailto:rfraser@bluefrog.com"
moz-do-not-send="true">rfraser@bluefrog.com</a>>
wrote:<br>
</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px
solid rgb(204,204,204);padding-left:1ex"
class="gmail_quote">
<div lang="EN-US">
<div>
<p class="MsoNormal">Parts List 6601334 lists 3 header
tanks.</p>
<p class="MsoNormal">1224725 Header
Tank up to B382001521</p>
<p class="MsoNormal">5221224 Header
Tank from B382001522 to B382001894</p>
<p class="MsoNormal">1236126 Header
Tank from B382001895</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Graham Vickery sent me a drawing
for Header Tank 1224725 and it indicates Filler Cap
9 lbs.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I don’t know if the drawings for
the other 2 header tanks are available to see which
Filler Cap they indicate.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Ron Fraser</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><b>From:</b> Joe Brown <<a
rel="noreferrer"
href="mailto:jbbrown1980@gmail.com"
moz-do-not-send="true">jbbrown1980@gmail.com</a>>
<br>
<b>Sent:</b> Tuesday, July 27, 2021 7:49 PM<br>
<b>To:</b> Ron Fraser <<a rel="noreferrer"
href="mailto:rfraser@bluefrog.com"
moz-do-not-send="true">rfraser@bluefrog.com</a>><br>
<b>Cc:</b> Tigers Den <<a rel="noreferrer"
href="mailto:Tigers@autox.team.net"
moz-do-not-send="true">Tigers@autox.team.net</a>><br>
<b>Subject:</b> Re: [Tigers] Radiator Cap</p>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">Thanks Ron, the .805" dimension
sounds like what I need.</p>
</div>
<p class="MsoNormal"> </p>
<div>
<div>
<p class="MsoNormal">On Tue, Jul 27, 2021, 6:37 PM
Ron Fraser <<a rel="noreferrer"
href="mailto:rfraser@bluefrog.com"
moz-do-not-send="true">rfraser@bluefrog.com</a>>
wrote:</p>
</div>
<blockquote
style="border-top:none;border-right:none;border-bottom:none;border-left:1pt
solid rgb(204,204,204);padding:0in 0in 0in
6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal">Joe</p>
<p class="MsoNormal"> I believe
I bought my radiator cap from Sunbeam
Specialties.</p>
<p class="MsoNormal">Cap indicates 9 lbs. and
G630.</p>
<p class="MsoNormal">Rubber seal to rubber
seal is .805”.</p>
<p class="MsoNormal">I installed a catch
bottle for the header tank overflow.
Catches any overflow which gets sucked back
in when the engine cools.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">The Parts lists indicates
9 lbs. later cars and 13 lbs. early cars.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Tiger, An Exceptional
Motorcar indicates B382001521 as last unit
with early header tank and 9 lb. cap –
B382001522 1<sup>st</sup> Tiger with updated
header tank and 13 lb. cap.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Well, no really good help
there.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I’m thinking 9 lbs. for
early cars and 13 lbs. for later cars is
correct</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Ron Fraser</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><b>From:</b> Tigers <<a
rel="noreferrer"
href="mailto:tigers-bounces@autox.team.net"
moz-do-not-send="true">tigers-bounces@autox.team.net</a>>
<b>On Behalf Of </b>Joe Brown<br>
<b>Sent:</b> Tuesday, July 27, 2021 6:07 PM<br>
<b>To:</b> Tigers Den <<a
rel="noreferrer"
href="mailto:Tigers@autox.team.net"
moz-do-not-send="true">Tigers@autox.team.net</a>><br>
<b>Subject:</b> [Tigers] Radiator Cap</p>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">Hi,</p>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">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. </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">A brand name and part
number would be great And also, what
should the pressure rating be? What I
have is 13 lbs.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Thanks,</p>
</div>
<div>
<p class="MsoNormal">Joe Brown</p>
</div>
</div>
</div>
</div>
</blockquote>
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