[Healeys] Thermostats

[David Nock]

You need to run a sleeved thermostat in order to block off the coolant bypass that is built into the cylinder head.

There are two available. 

One is the sleeved bellows type. This one if you are running a higher than normal pressure cap will collapse under pressure and close the thermostat causing the engine to overheat.

The other is a wax capsule type which is the one that we always use.


David Nock
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From: Fred Wescoe 
Sent: Sunday, September 09, 2018 5:38 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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