400 Thermostat
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Posting Guru
Joined: Feb 2007
Posts: 1,735
Likes: 2
From: Wingo, Ky
400 Thermostat
What t-stat should be in a 79 400? I have a 190 in my 302 wondering if it is good for the 400 also? The one in my 400 right now is stuck open and it takes forever for it to get warm enough to have heat.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
It does happen. Try to stick between 190 and 195. The cooler an engine runs, the harder it is on your bearings. 190-195 is the ideal operating range. I've heard of thermostats as low as 165 which I do not recommend at all.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Lead Driver
Joined: Nov 2000
Posts: 6,625
Likes: 342
From: Albuquerque
Robert shaw type all the way. They flow more are better built (different style) and if they do fail they will probably fail open instead of closed. I never seen one fail. I like 192 winter and 185 summer.
