Thermostat Knowldge...
Cargo Master
Joined: Dec 2008
Posts: 3,213
Likes: 321
From: SW PA
In doing some online research, it appears the Dayco DT66A is a correct replacement as indicated by tbear above.
I also have a stant replacement at home that I haven't opened yet to see if it has the restrictor button on the bottom - I doubt it!
I saw the dayco listed for $35 so $25+shipping for an original motorcraft RT-139 is not necessarily a bad price for a mostly obsolete item....even considering aftermarket options.
Dayco Thermostat DT66A
I also have a stant replacement at home that I haven't opened yet to see if it has the restrictor button on the bottom - I doubt it!
I saw the dayco listed for $35 so $25+shipping for an original motorcraft RT-139 is not necessarily a bad price for a mostly obsolete item....even considering aftermarket options.
Dayco Thermostat DT66A
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Junior User
Joined: Dec 2011
Posts: 80
Likes: 0
I have a 333-195 Robert Shaw coming. It's a Chinese made one, but from what I read, but it should work. It was cheaper, but about $5 then the RT-139.
Since we are headed into the deep freeze again up here in Northern MN, I'm not driving it and holding off on doing any work on it.. No heated garage to work in. Makes for a terrible time wrenching on stuff....
Since we are headed into the deep freeze again up here in Northern MN, I'm not driving it and holding off on doing any work on it.. No heated garage to work in. Makes for a terrible time wrenching on stuff....
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