I have run Robert Shaw T-states exclusively for about 10 years now, I used to always change the T-stat when ever I changed Fluids or hoses until about 15 years ago. That's when I got a succession of junk new T-stats from my local auto parts store.
My mothers car had no overheating issues, I changed the hoses coolant, and T-stat, she drove it about 10 miles from my house and it overheated. After geting back home I discovered the "new" T-stat would not open fully. Put the old one back in and she never had another issue with it. Had several customers cars do simalure things. Stopped using Stat and NAPA brand T-stats after that summer.
I am sure that other brand premiem or high flow stats would work also, I have just never used them.
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Jeff R
60 Jaguar Mark 2, 3.8L Automatic
67 Sprint Firebird 230 OHC-6 4-Speed A/C
78 Catlina Safari, Pontiac 400 powered
77 Astre Formula, 215 Buick V-8 T-5
73 Lemans Safari, 400 4bbl 4-speed
71 Catalina Enforcer, 455 4bbl
06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed!
2012 F-150 Echo Boost (My local Ford Dealer SUX!!!)
2020 Dodge Charger Scat pack (recovered)
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