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Hi all;
Installing a new radiator and would like to replace my stat with one that fails in the open position. I did a search and nothing came up . does anyone know of a particular brand that is reliable and where to purchase one. Trying to avoid the off shore parts. Thanks.
Car is '73 350
Last edited by tpfarm; May 21, 2017 at 09:54 AM.
Reason: more info
Thermostats normally fail closed due to the fact they are closed when the engine is cold (ironically my two dead thermostats in 36 years/21 cars, have both failed open).
I started drilling a small bypass hole in thermostats in the early 90s if it doesn't have one already from factory. Saw it on a Mazda I was working on at the time and thought it was a good idea. Google Images "thermostat bypass hole"
Last edited by Dynra Rockets; May 21, 2017 at 06:20 AM.
YEP..I drill a small hole in the thermostat also....and have been doing it long before it seems to be a common practice from some auto manufacturers.
I have had ONE of the 'fail safe' thermostats from O'Reillys fail and not do its job...so I do not use them any longer....that is why you have a temp gauge....to keep an eye on it.
I can agree with that. As long as the end result is doing its job and the temps are not skyrocketing....it does not matter.
I have used what I have shown in the photo below in some unique applications and often times they may need to be changed from a 'summer time' set-up to a 'winter time' set-up due to the owner want the heater to put off good heat.
My dad showed me this a long time ago, right/wrong ? Cant say but it sure does make it easier to evacuate the air from the Vetts cooling system.
I have been doing it like this for so ling I can not remember when I started it and I have NEVER had an issue with the hole in the thermostat causing any problems. This DEFINITELY speeds up getting the air out of the system.
Originally Posted by Mr D.
This is a science project in the making, will post all my findings in another thread.
BOY do I know what you mean by that statement. If you can remember to do so...PM me a link to it ...just in case I miss it when you start that thread.
Thermostat fail safe
