What's this line for?

[cerickson]

Maybe a total dumb question, but what's this line for. It's on my 08 mega cab. It's a line that goes from the exhaust manifold to what looks like the thermostat housing. It's a metal line. Noticed it when I did my deletes. What is the purpose of the coolant line going into the manifold? Just a dumb question I know. Was wondering if I could just plug it off? Thanks

 

[Green2015]

I believe it exhaust pressure buddy. And far as unplugging it. It made mine run like crap

 

[BRE]

It's exhaust back pressure. No coolant running through. I believe it depends on who's tuning as if it's used or not. We always leave them intact as I've never asked any tuners if it's in play or not.


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[cerickson]

Thanks for the replies. Figured I would ask before I just did it and made the truck run like chit.

 

[Cacciatore]

Don't unplug it unless you are 2G swapped or otherwise delete the VGT. That line is a pressure sensor that most importantly monitors back pressure when using the exhaust brake so that the engine doesn't blow up from the VGT constricting down too tight.

After a 2G swap, the line is trash and the port can just be left open since the sensor is ignored.