[Tigers] Radiator Cap

Ken Tisdale ktisdale at ix.netcom.com
Thu Aug 19 15:03:33 MDT 2021


Very nice!

Ken

On 8/19/2021 10:00 AM, Donald Antilla via Tigers wrote:
>
> Here is what I did on my Series 200 Griffith.
>
> I wanted to hide the overflow tank, so we (Bob Cuneo) took an old fire 
> extinguisher, cut/sectioned/welded it so it would fit (on the 
> Griffith) close to the tubular frame and not be obvious.
>
> It is difficult to see in the photo labeled “surge tank installed” how 
> well it hides, but it is really hard to spot. Note: I had the red cap 
> reanodized black to make it less obvious.
>
> Don
>
> For a coolant recovery system I'm currently using my old original 
> washer bottle mounted in the bracket that originally held the remote 
> oil filter.  I would like to come up with a different solution that I 
> can mount to the inner fender in front of the expansion tank.  I'm 
> concerned that the plastic washer bottle in its current location up 
> against the engine might suffer from the heat. Moss Motors has an 
> overflow bottle for a Triumph that wouldn't look out of place in the 
> Tiger, https://mossmotors.com/overflow-bottle-1 
> <https://mossmotors.com/overflow-bottle-1>. But the bracket is kind of 
> pricey.  I might try to make my own bracket.
>
> Have Fun,
>
> Joe Brown
>
> On Thu, Aug 19, 2021 at 10:39 AM Ron Fraser via Tigers 
> <tigers at autox.team.net <mailto:tigers at autox.team.net>> wrote:
>
>     This has been a wonderful discussion.   Please include any
>     manufacturer and part number when you find good workable parts for
>     any area on the Tiger.   We also need to know possible bad part
>     numbers too.   We all need that kind of information on hand for
>     future reference.
>
>     I still recommend a coolant recovery system to everyone then you
>     know exactly when and how much coolant is moving back and forth
>     through the system.
>
>     Make it a simple setup that can easily be removed if judging is
>     your priority.
>
>     Personally, I prefer not to pollute the ground with coolant of any
>     kind and I really don’t want coolant possibly spraying onto my
>     tire while driving or stopping.
>
>     Ron Fraser
>
>     *From:* Tigers <tigers-bounces at autox.team.net
>     <mailto:tigers-bounces at autox.team.net>> *On Behalf Of *Gary
>     *Sent:* Thursday, August 19, 2021 9:26 AM
>     *To:* michael king <michael.s.king at gmail.com
>     <mailto:michael.s.king at gmail.com>>; Douglas Lyle
>     <douglasalyle at yahoo.com <mailto:douglasalyle at yahoo.com>>
>     *Cc:* Tigers Den <tigers at autox.team.net
>     <mailto:tigers at autox.team.net>>
>     *Subject:* Re: [Tigers] Radiator Cap
>
>     Or you were just over filling it.
>     It is normal for the Tiger to blow out the little hose until it
>     gets down to where it needs to be.
>     Gary
>
>     On 8/18/2021 11:38 PM, michael king via Tigers wrote:
>
>         doug sounds like the spring wasnt strong enough or that
>         perhaps very slightly to shallow?
>
>         On Thursday, 19 August 2021, Douglas Lyle via Tigers
>         <tigers at autox.team.net <mailto:tigers at autox.team.net>> wrote:
>
>             Joe, I've had two failures with those Scott Drake caps.
>             They were about 10 years apart.    Both failed soon after
>             installation.    The 10 year gap was because I had
>             forgotten that the first one failed and then 10 years
>             later I bought another and it also failed.    Ended up
>             finding an NOS cap and that solved the problem.
>
>             Both Scott Drake caps were allowing coolant to puke out
>             after short drives.   Dimensions looked identical.   Your
>             results may vary.  Just keep an eye on it.
>
>             Doug
>
>             On Wednesday, August 18, 2021, 10:21:47 AM PDT, Joe Brown
>             <jbbrown1980 at gmail.com <mailto:jbbrown1980 at gmail.com>> wrote:
>
>             I have an update on my quest to find a radiator cap.  I
>             wound up ordering a Scott Drake Mustang cap from CJ Pony
>             Parts and it fits really well.  And since my temp gauge
>             was always pegged out really high I installed a mechanical
>             temp gauge from Summit on my Edelbrock intake.  After
>             idling for about 20 minutes the temp never got over 190. 
>             Now I need to take it out for a long drive and see how it
>             does.
>
>             Thanks for all of MKdoug soijds info from everybody.
>
>             Thanks,
>
>             Joe Brown
>
>             On Thu, Jul 29, 2021 at 9:35 AM Ron Fraser
>             <rfraser at bluefrog.com <mailto:rfraser at bluefrog.com>> wrote:
>
>                 Jim
>
>                 Thank you for the pictures.
>
>                 It appears I have the MOPAR 5220487 Filler cap – good
>                 to know.
>
>                 This also indicates that any 522xxxx number in the
>                 Parts List is a Chrysler part number – excellent.
>
>                 Ron Fraser
>
>                 *From:*jimdamelio <jimdamelio at verizon.net
>                 <mailto:jimdamelio at verizon.net>>
>                 *Sent:* Wednesday, July 28, 2021 8:11 PM
>                 *To:* Joe Brown <jbbrown1980 at gmail.com
>                 <mailto:jbbrown1980 at gmail.com>>; Ron Fraser
>                 <rfraser at bluefrog.com <mailto:rfraser at bluefrog.com>>
>                 *Cc:* Tigers Den <Tigers at autox.team.net
>                 <mailto:Tigers at autox.team.net>>
>                 *Subject:* Re: [Tigers] Radiator Cap
>
>                 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".
>
>                 Jim D
>
>                 Sent from my Galaxy
>
>                 -------- Original message --------
>
>                 From: Joe Brown via Tigers <tigers at autox.team.net
>                 <mailto:tigers at autox.team.net>>
>
>                 Date: 7/28/21 6:49 PM (GMT-05:00)
>
>                 To: Ron Fraser <rfraser at bluefrog.com
>                 <mailto:rfraser at bluefrog.com>>
>
>                 Cc: Tigers Den <Tigers at autox.team.net
>                 <mailto:Tigers at autox.team.net>>
>
>                 Subject: Re: [Tigers] Radiator Cap
>
>                 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 at gmail.com <mailto:jbbrown1980 at 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 you 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 at bluefrog.com
>                     <mailto:rfraser at 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 indicates Filler Cap 9 lbs.
>
>                         I don’t know if the drawings for the other 2
>                         header tanks are available to see which Filler
>                         Cap they indicate.
>
>                         Ron Fraser
>
>                         *From:*Joe Brown <jbbrown1980 at gmail.com
>                         <mailto:jbbrown1980 at gmail.com>>
>                         *Sent:* Tuesday, July 27, 2021 7:49 PM
>                         *To:* Ron Fraser <rfraser at bluefrog.com
>                         <mailto:rfraser at bluefrog.com>>
>                         *Cc:* Tigers Den <Tigers at autox.team.net
>                         <mailto:Tigers at 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 at bluefrog.com
>                         <mailto: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 1^st 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
>                             <mailto: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
>                             <mailto: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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>
>
>         -- 
>         Regards
>
>         Michael King
>
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>
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-- 
Ken Tisdale 303-807-5488
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