[Healeys] Thermostats

Thu Sep 13 09:07:15 MDT 2018

Yes we have a wax capsule type thermostat that incorporates the sleeve, They only come in one temperature 165 degree.

David Nock
British Car Specialists
209-948-8767
www.britishcarspecialists.com

From: Don Day 
Sent: Wednesday, September 12, 2018 8:26 PM
To: David Nock BCS 
Subject: Re: [Healeys] Thermostats

So do you sell a sleeved thermostat for my 67 BJ-8  
          Don 

Sent from my iPad

On Sep 12, 2018, at 11:49 AM, David Nock BCS <healeydoc at sbcglobal.net> wrote:

  Remember the job of the thermostat is not to COOL the engine. It is there to get the engine up to operating temperature as soon as possible. The radiator, fan, air ducts are there to maintain the engine temperature.

  The sleeved thermostat is there to block a bypass in the cylinder head that is there to allow coolant to circulate when the thermostat is closed. If you use a non sleeved thermostat you will have part of the coolant NOT going thru the radiator thus causing the engine temp to run high.

  Next how many lights and badges do you have on the front of your car. They will deflect some of the air going into the radiator.

  David Nock
  British Car Specialists
  209-948-8767
  www.britishcarspecialists.com

  From: Roger Grace 
  Sent: Tuesday, September 11, 2018 3:44 PM
  To: BJ8Healeys ; 'healeys' 
  Subject: Re: [Healeys] Thermostats

  Steve,
  Yes agree with your take on the 160 F thermostats. The only possible benefit is that if you start with a lower coolant temp, when you hit traffic, it will take longer before the dreaded over temp zone is approached.
  As an aside, I have installed an oil temp gauge; very useful and a reminder just how long the engine (not coolant) takes to get up to temp. Trying to get in the habit of not going over 2000 RPM till OT is about 120F – often another 15-20 mins after the thermostat opens. 
  rg

  From: BJ8Healeys 
  Sent: Monday, September 10, 2018 12:44 PM
  To: 'healeys' 
  Subject: Re: [Healeys] Thermostats

  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

  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

       Virus-free. www.avg.com  

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