[Healeys] Thermostats

i erbs eyera3000 at gmail.com
Tue Sep 11 10:23:45 MDT 2018


I had a NOS sleeved unit that failed. Replaced it with a 187 regular one.
Car runs fine
Ira Erbs
Portland,OR
      _______                                  _______
     (______ \____1959 BN4____/ _______)
         (_________________________)
          BT7 engine and disk brakes


1967 MGB  [image: MG]

A racing car is an animal with a thousand adjustments. Mario Andretti
Please excuse random auto corrects and misspelled words


On Tue, Sep 11, 2018 at 6:01 AM BJ8Healeys <sbyers at ec.rr.com> wrote:

> Fred, I personally believe a 160-deg. F thermostat used in an effort to
> "cool down" a Healey is useless.  A thermostat responds only to the
> temperature of the coolant flowing through it by opening up to increase
> coolant flow, and once it is open all the way at 160+, it is out of the
> loop and can't open further to cool more.  I am on the NC coast where
> winters are mild.  I once tried a 160 (non-sleeved) because I had one that
> someone gave me.  My BJ8 ran so cold that winter that I actually had to
> block part of the radiator to raise it to anywhere near normal.  Up there
> in the NC mountains, that would be even more of a problem for you.
>
> I use a 187 F (86 C) New Old Stock AC sleeved thermostat (AC part number
> 1572320) that I was able to score from lister Kees Oudesluijs.  I installed
> it along with an upgraded core in the radiator at the same time, so I can't
> really say how much improvement the thermostat alone did; but since the
> modification my car runs consistently at 170 - 180 in the hot summers of
> the NC coast, except when in stop-and-go traffic when it might make it to
> 190 or a bit above.  In winter, it runs at 160 - 170.  I can see the sleeve
> operate as the car warms up because the gauge will cycle between 160 and
> 190 until coolant temperature stabilizes.  That can take up to 50 miles.
>
> A friend placed an order later with Kees for several of the 190 F sleeved
> thermostats.  I got one of those as a spare.  Don't know if he has any
> left, or can get more.  As far as I know, the only sleeved thermostats
> available from the usual suspects are 160s and I wouldn't waste my money on
> them.
>
> I just Googled the AC part number and came up with this source:
>
> *https://tinyurl.com/y9c6n53h <https://tinyurl.com/y9c6n53h>*
>
> Unfortunately, it does not post to the USA (but on the bright side, it
> offers free shipping!).  Maybe you could work out a deal with a UK lister
> to buy one for you and ship it to you.  £19.99 = $26.04
>
>
>
> Steve Byers
>
> HBJ8L/36666
>
> BJ8 Registry
>
> AHCA Delegate at Large
>
> Havelock, NC
>
>
>
>
>
> *From:* Healeys [mailto:healeys-bounces at autox.team.net] *On Behalf Of *Fred
> Wescoe
> *Sent:* Sunday, September 09, 2018 8:38 PM
> *To:* healeys
> *Subject:* [Healeys] Thermostats
>
>
>
> Listers,
>
>
>
> I have researched what I can of the archives and other sources and am
> still puzzled.  I cannot find any real answers and direction on the
> question of which thermostat I should use in my 66 BJ8.  Some answers
> indicate a sleeved thermostat and others say no sleeve.  Some say a short
> sleeve and others say only the long sleeve works.  Some answers indicate
> using a 160 degree thermostat while others propose 180 degrees and even 190
> degrees.  Some even say the Moss sleeved thermostat does not work.
>
>
>
> I am in North Carolina and drive the car most of the year.  Right now the
> car has a non sleeved 190 degree thermostat.  The car starts and needs to
> warm up, at idle, to almost full temp before it runs with no problems.
> Otherwise it spits, coughs and has no power.  The car runs at about 190
> degres except when I drive the mountains and of course stop and go traffic.
>
>
>
> What is the consensus of thoughts as we approach colder weather?  And what
> are the sources and manufacturer for a good thermostat?
>
>
>
> Thanks for the help,
>
>
>
> Fred
>
> 66BJ8
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