Once again I couldn't get the search to find what I wanted. So can someone direct me to the thread on putting a 4th gen thermostat in a. 2nd gen? Was it a 205 degree stat?

200*F thermostat from 6.7L will fit. Yes. There is a member here Pepsi71Ocean that did it.

Thanks. Will any year of 6.7 stat work?

What's the reason for wanting such a hot thermostat? I don't understand this one.Sent from my DROID BIONIC using Tapatalk

Diesels work on combustion so you want more heat in the engine to burn better

I know how diesels work, lol, I can understand why the newer engines need a hotter thermostat due to the higher injection pressures with CR injection but don't see a reason on a VP or older truck. Other than heat in the cab for winter.Sent from my DROID BIONIC using Tapatalk

The hotter the engine the better the fuel burns. Just like they say you should avoid idleing your truck becuase the engine is so efficient at cooling that the cylinder temps drop causing unburnt fuel, which will end up causing carbon and can cause varnish on the valve stems.

I know how diesels work, lol, I can understand why the newer engines need a hotter thermostat due to the higher injection pressures with CR injection but don't see a reason on a VP or older truck. Other than heat in the cab for winter. Sent from my DROID BIONIC using Tapatalk

Heat in the cab is the reason!

As far as I found any 6.7L thermostat will work. Make sure to specify your looking for the 200*F and you might end up ordering it. Funny all the parts stores in my area from home to Ontario, OR do not stock it.

It has to be a 2010+ 6.7L, the 07-09's use the same 190° as the 5.9's.If I could find a way to reprogram my fan I would do this as well.

Are you running a winter front? You know, the insert panels in the grill that close that air source off. There's still air coming through the bumper, of course. It speeds warm up & puts the coolers & radiator in a warmer environment without blocking. Time for me to dig mine out since I've got the camper home I'm done heavy towing for the season. I might use a utility trailer locally & I've never noticed any temp rise doing so (but still watch).

Like I've learned from watching coolant temperatures and IAT temperatures on the 24V Engines the coolant temperature will effect the offset of the IAT temperature which is typically +40*F over outside temperature. So now if you increase the engine temperature the offset also increases. Now for every 10* drop from 140*F IAT temperature you lose roughly 1 MPG. As the IAT continues to fall in minus weather like as low as +20*F IAT Temperature that I've seen you be down to about 14 MPG tops. Cold air does hurt MPG's. Heck this morning its only 14*F in New Meadows, ID... (Brrr....)

Heck this morning its only 14*F in New Meadows, ID... (Brrr....)

Must be nice........ It was 3*F when I went to bed and 4*F when I got up.

Here in the good ole Lone Star state it got down to 32 last night and its only 34 mid day. Time to move farther south

Here in the good ole Lone Star state it got down to 32 last night and its only 34 mid day. Time to move farther south

Just don't go too far south, I hear the water sucks down there!

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Must be nice........ It was 3*F when I went to bed and 4*F when I got up.

You can keep it! It was 17 here last night but the 35 mph winds were eating through my shorts in no time. Turned my outtie into an innie.

Just don't go too far south, I hear the water sucks down there!

Ain't that what tequilla is for???

You can keep it! It was 17 here last night but the 35 mph winds were eating through my shorts in no time. Turned my outtie into an innie.

TMI!! TMI!!:ahhh:

Ain't that what tequilla is for???

To kill the swimmers in the water??

Are you running a winter front? You know, the insert panels in the grill that close that air source off. There's still air coming through the bumper, of course. It speeds warm up & puts the coolers & radiator in a warmer environment without blocking. Time for me to dig mine out since I've got the camper home I'm done heavy towing for the season. I might use a utility trailer locally & I've never noticed any temp rise doing so (but still watch).

I slip a piece of cardboard between the rad and the air cooler. I find I get good heat in the cab with 195 degree coolant but at 190 it's already not nearly as warm. I want to try the hotter stat to see if it helps at all. I can't see it hurting in any way. By the way it's already been down to -13 here.

I'm not a fan of the cardboard idea. You block airflow to the engine bay. That leaves an aspect of overheating if its not cold enough. But airflow is also a factor. What I mean is the lack of air flow due to the fan being blocked. IIRC, it puts extra strain on the fan or fans.

I used the cardboard idea but wild and free told gave me a trick. You just cut a hole in the center, or right in front of where the fan is. Make it about 6" round and you'll be good to go.

I've used another variation, I used a big enough piece of cardboard to cover about half the radiator. Still kicked the fan on when needed but helped tremendously with heat output. Also get some cheap spray paint and paint the cardboard before you put it in, help keeps it from falling apart when it gets soaked.Sent from my DROID BIONIC using Tapatalk