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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?
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.
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.
Ron, the G630 cap pulls up as a match for some older Land Rovers but I'm
only finding used ones.
If anybody has recently purchased a new cap that is working fine please let
me know what you got.
Thanks,
Joe Brown
On Tue, Jul 27, 2021 at 8:40 PM Joe Brown <jbbrown1980@gmail.com> wrote:
> I pulled out my copy of TBON and he also listed a 9 lb. cap up to
> B382001521 and 13 lb. after that.
>
> I sent an email to Rick at SS to see if his part number RC5 is the cap yo=
u
> described. It doesn't say it's for the Tiger, it just says it's for the
> series V.
>
> On Tue, Jul 27, 2021, 8:27 PM Ron Fraser <rfraser@bluefrog.com> wrote:
>
>> Parts List 6601334 lists 3 header tanks.
>>
>> 1224725 Header Tank up to B382001521
>>
>> 5221224 Header Tank from B382001522 to B382001894
>>
>> 1236126 Header Tank from B382001895
>>
>>
>>
>> Graham Vickery sent me a drawing for Header Tank 1224725 and it indicate=
s
>> Filler Cap 9 lbs.
>>
>>
>>
>> I don=E2=80=99t know if the drawings for the other 2 header tanks are av=
ailable
>> to see which Filler Cap they indicate.
>>
>>
>>
>> Ron Fraser
>>
>>
>>
>> *From:* Joe Brown <jbbrown1980@gmail.com>
>> *Sent:* Tuesday, July 27, 2021 7:49 PM
>> *To:* Ron Fraser <rfraser@bluefrog.com>
>> *Cc:* Tigers Den <Tigers@autox.team.net>
>> *Subject:* Re: [Tigers] Radiator Cap
>>
>>
>>
>> Thanks Ron, the .805" dimension sounds like what I need.
>>
>>
>>
>> On Tue, Jul 27, 2021, 6:37 PM Ron Fraser <rfraser@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=E2=80=9D.
>>
>> 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 =E2=80=93 B382001522 1st Tiger with upda=
ted
>> header tank and 13 lb. cap.
>>
>>
>>
>> Well, no really good help there.
>>
>>
>>
>> I=E2=80=99m thinking 9 lbs. for early cars and 13 lbs. for later cars is=
correct
>>
>>
>>
>> Ron Fraser
>>
>>
>>
>>
>>
>>
>>
>> *From:* Tigers <tigers-bounces@autox.team.net> *On Behalf Of *Joe Brown
>> *Sent:* Tuesday, July 27, 2021 6:07 PM
>> *To:* Tigers Den <Tigers@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 Autozon=
e'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 fro=
m
>> the top edge to the flange where the spring part of the cap would sit an=
d
>> got .777". I measured the cap from the big rubber seal just under the c=
ap
>> 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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<div dir=3D"ltr">Just to add to my confusion I took a look at the Tiger Par=
ts List Supplement (pub number 6601131) and I'm guessing this only cove=
rs the Tigers up to=C2=A0
B382001521 because it only shows the 1224725 header tank and Ron has=C2=A0
Parts List 6601334 which show two more tanks.=C2=A0=C2=A0=C2=A0=C2=A0Parts =
List=C2=A0
6601131=C2=A0 says the 9 lb. cap is for "later" cars and the 13 l=
b. cap is for "earlier" cars.=C2=A0 This seems to contradict what=
is in TBON.=C2=A0 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.=C2=A0 All of the usual sources want to cross this over to =
a 13 lb. cap.=C2=A0 I did find a 9 lb. cap made by Motorad but I can't =
find what the stem length is.=C2=A0 I guess I will have to go down to the d=
ifferent part stores and look at what they have.=C2=A0=C2=A0</div><div><br>=
</div><div>Sunbeam Specialties has three different caps for sale but they a=
re for Alpines, not Tigers.=C2=A0 I asked Rick if any of them would work fo=
r the Tiger and he said the pressure rating was too low.=C2=A0=C2=A0</div><=
div><br></div><div>Ron, the G630 cap pulls up as a match for some older Lan=
d Rovers but I'm only finding used ones.</div><div><br></div><div>If an=
ybody has recently purchased a new cap that is working fine please let me k=
now what you got.</div><div><br></div><div>Thanks,</div><div>Joe Brown</div=
></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr"=
>On Tue, Jul 27, 2021 at 8:40 PM Joe Brown <<a href=3D"mailto:jbbrown198=
0@gmail.com">jbbrown1980@gmail.com</a>> wrote:<br></div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid r=
gb(204,204,204);padding-left:1ex"><div dir=3D"auto">I pulled out my copy of=
TBON and he also listed a 9 lb. cap up to B382001521 and 13 lb. after that=
.=C2=A0<div dir=3D"auto"><br></div><div dir=3D"auto">I sent an email to Ric=
k at SS to see if his part number RC5 is the cap you described. It doesn=
9;t say it's for the Tiger, it just says it's for the series V.</di=
v></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr=
">On Tue, Jul 27, 2021, 8:27 PM Ron Fraser <<a href=3D"mailto:rfraser@bl=
uefrog.com" target=3D"_blank">rfraser@bluefrog.com</a>> wrote:<br></div>=
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div>=
<p class=3D"MsoNormal">Parts List 6601334 lists 3 header tanks.<u></u><u></=
u></p><p class=3D"MsoNormal">1224725=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Header Tank=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 up to B382001521<u></u><u></u></p><p class=3D"MsoN=
ormal">5221224=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Header Tank=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 from B382001522 to B382001894<u></u><u></u></p><p class=3D"MsoNormal">1=
236126=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 Header Tank =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 from B3820=
01895<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p cl=
ass=3D"MsoNormal">Graham Vickery sent me a drawing for Header Tank 1224725 =
and it indicates Filler Cap 9 lbs.<u></u><u></u></p><p class=3D"MsoNormal">=
<u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">I don=E2=80=99t know if the =
drawings for the other 2 header tanks are available to see which Filler Cap=
they indicate.<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u=
></p><p class=3D"MsoNormal">Ron Fraser<u></u><u></u></p><p class=3D"MsoNorm=
al"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><b>From:</b> Joe Brown &=
lt;<a href=3D"mailto:jbbrown1980@gmail.com"; rel=3D"noreferrer" target=3D"_b=
lank">jbbrown1980@gmail.com</a>> <br><b>Sent:</b> Tuesday, July 27, 2021=
7:49 PM<br><b>To:</b> Ron Fraser <<a href=3D"mailto:rfraser@bluefrog.co=
m" rel=3D"noreferrer" target=3D"_blank">rfraser@bluefrog.com</a>><br><b>=
Cc:</b> Tigers Den <<a href=3D"mailto:Tigers@autox.team.net"; rel=3D"nore=
ferrer" target=3D"_blank">Tigers@autox.team.net</a>><br><b>Subject:</b> =
Re: [Tigers] Radiator Cap<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=
=C2=A0<u></u></p><div><p class=3D"MsoNormal">Thanks Ron, the .805" dim=
ension sounds like what I need.<u></u><u></u></p></div><p class=3D"MsoNorma=
l"><u></u>=C2=A0<u></u></p><div><div><p class=3D"MsoNormal">On Tue, Jul 27,=
2021, 6:37 PM Ron Fraser <<a href=3D"mailto:rfraser@bluefrog.com"; rel=
=3D"noreferrer" target=3D"_blank">rfraser@bluefrog.com</a>> wrote:<u></u=
><u></u></p></div><blockquote style=3D"border-top:none;border-right:none;bo=
rder-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=3D"MsoNormal">J=
oe<u></u><u></u></p><p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 I believe I bo=
ught my radiator cap from Sunbeam Specialties.<u></u><u></u></p><p class=3D=
"MsoNormal">Cap indicates 9 lbs. and G630.<u></u><u></u></p><p class=3D"Mso=
Normal">Rubber seal to rubber seal is .805=E2=80=9D.<u></u><u></u></p><p cl=
ass=3D"MsoNormal">I installed a catch bottle for the header tank overflow.=
=C2=A0=C2=A0 Catches any overflow which gets sucked back in when the engine=
cools.<u></u><u></u></p><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p><p =
class=3D"MsoNormal">The Parts lists indicates 9 lbs. later cars and 13 lbs.=
early cars.<u></u><u></u></p><p class=3D"MsoNormal">=C2=A0<u></u><u></u></=
p><p class=3D"MsoNormal">Tiger, An Exceptional Motorcar indicates B38200152=
1 as last unit with early header tank and 9 lb. cap =E2=80=93 B382001522 1<=
sup>st</sup> Tiger with updated header tank and 13 lb. cap.<u></u><u></u></=
p><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p><p class=3D"MsoNormal">Wel=
l, no really good help there.<u></u><u></u></p><p class=3D"MsoNormal">=C2=
=A0<u></u><u></u></p><p class=3D"MsoNormal">I=E2=80=99m thinking 9 lbs. for=
early cars and 13 lbs. for later cars is correct<u></u><u></u></p><p class=
=3D"MsoNormal">=C2=A0<u></u><u></u></p><p class=3D"MsoNormal">Ron=C2=A0 Fra=
ser<u></u><u></u></p><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p><p clas=
s=3D"MsoNormal">=C2=A0<u></u><u></u></p><p class=3D"MsoNormal">=C2=A0<u></u=
><u></u></p><p class=3D"MsoNormal"><b>From:</b> Tigers <<a href=3D"mailt=
o:tigers-bounces@autox.team.net" rel=3D"noreferrer" target=3D"_blank">tiger=
s-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 href=3D"=
mailto:Tigers@autox.team.net"; rel=3D"noreferrer" target=3D"_blank">Tigers@a=
utox.team.net</a>><br><b>Subject:</b> [Tigers] Radiator Cap<u></u><u></u=
></p><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p><div><p class=3D"MsoNor=
mal">Hi,<u></u><u></u></p><div><p class=3D"MsoNormal">=C2=A0<u></u><u></u><=
/p></div><div><p class=3D"MsoNormal">I'm hoping one of you guys can tel=
l me what radiator cap I should be using.=C2=A0 I've tried a cap that w=
as listed as being for a Tiger on Autozone's website but I think the pr=
essure spring part under the cap is too short.=C2=A0 I almost immediately s=
tart getting water out of the overflow tube as the engine warms up.=C2=A0 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".=C2=A0=
I measured the cap from the big rubber seal just under the cap to the smal=
l rubber seal at the end of the spring and got something like .75".=C2=
=A0 So it looks like I need a cap with a longer spring stem.=C2=A0=C2=A0<u>=
</u><u></u></p></div><div><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p></=
div><div><p class=3D"MsoNormal">A brand name and part number would be great=
.=C2=A0 And also, what should the pressure rating be?=C2=A0 What I have is =
13 lbs.<u></u><u></u></p></div><div><p class=3D"MsoNormal">=C2=A0<u></u><u>=
</u></p></div><div><p class=3D"MsoNormal">Thanks,<u></u><u></u></p></div><d=
iv><p class=3D"MsoNormal">Joe Brown<u></u><u></u></p></div></div></div></di=
v></blockquote></div></div></div></blockquote></div>
</blockquote></div>
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