Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
New showcase items
New showcase comments
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Showcase
New items
New comments
Latest content
Latest reviews
Latest updates
Search showcase
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Power Strokes
6.4 Aftermarket
Low temperature 6.4 thermostats
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
[QUOTE="Mattyh3, post: 1569163, member: 41684"] Anyone have issues with mishimoto low temp thermostats in there 6.4? This is the 2nd set of thermostats I’ve gotten from them and both have been stuck open out of the box. I can’t get the truck over 170 degrees even on the highway, and idle it drops down to 150s. Outside temps are 80 degrees. P0128 code as well so I’m confident they’re stuck open. Is there something that I’m doing wrong when installing these? They want me to purchase a replacement set at a “discounted” rate because I waited a few years before putting in the replacement set they sent me originally since I had already put in a new set of OE temp ones before they got to me. A little hesitant to buy a 3rd set [/QUOTE]
Insert quotes…
Verification
Post reply
Random media
Latest posts
02 F250 7.3 Will crank, WTS stays on, no start, no OBD
Latest: Sterling6.7
Sunday at 8:57 PM
7.3 Tech
P0087
Latest: DEEZUZ
Sunday at 11:49 AM
6.4 Tech & FAQ
2015-2019 6.7 HPFP New In Box
Latest: lincolnlocker
Jun 1, 2026
Engine and Drivetrain
First 6.0L (56k warning)
Latest: adrianspeeder
May 26, 2026
6.0 Tech
Extra external motor oil cooler?
Latest: justinlogue5_0
May 26, 2026
7.3 Tech
Members online
Patrick Feeley
Forums
Power Strokes
6.4 Aftermarket
Low temperature 6.4 thermostats
Top