What's this line for? - Competition Diesel.Com

cerickson · 07-28-2017, 10:34 AM

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 · 07-28-2017, 10:42 AM

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

BRE · 07-28-2017, 10:50 AM

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 · 07-28-2017, 10:56 AM

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

Cacciatore · 08-29-2017, 09:03 AM

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.

07-28-2017, 10:34 AM	#1
cerickson Name: cerickson Title: fullpull108 Status: Not Here Join Date: Feb 2011 Location: sw mo Member`s Gallery Posts: 1,071	What's this line for? 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 __________________ Chad Mine: 2008 Dodge 3500 megacab 4x4 drw 6 SPD stick. Anarchy EFI, Flo Pro egr delete, 5" straight pipe, Edge cts2 Wifes: 2006 Dodge 3500 megacab 4X4 drw goerend auto, 4 inch straight pipe, S&B cai, FASS 150 pump, EFI live by Anarchy

07-28-2017, 10:56 AM	#4
cerickson Name: cerickson Title: fullpull108 Status: Not Here Join Date: Feb 2011 Location: sw mo Member`s Gallery Posts: 1,071	Thanks for the replies. Figured I would ask before I just did it and made the truck run like chit. __________________ Chad Mine: 2008 Dodge 3500 megacab 4x4 drw 6 SPD stick. Anarchy EFI, Flo Pro egr delete, 5" straight pipe, Edge cts2 Wifes: 2006 Dodge 3500 megacab 4X4 drw goerend auto, 4 inch straight pipe, S&B cai, FASS 150 pump, EFI live by Anarchy

08-29-2017, 09:03 AM	#5
Cacciatore Name: Cacciatore Title: Green Behind the Ears Status: Not Here Join Date: May 2017 Location: NW Indiana Member`s Gallery Posts: 56	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. __________________ '11 2500 CCSB \|s476 T6\|S&S 12mm\|S&S 150%\|WPD 48RE\|Freedom Racing Engines '13 3500 MCSB \|Stainless s465\|\|S&S 10mm\|Wilson Patterson 68RFE

07-28-2017, 10:42 AM	#2
Green2015 Name: Green2015 Title: Too Much Time Status: Not Here Join Date: Dec 2015 Member`s Gallery Posts: 379	I believe it exhaust pressure buddy. And far as unplugging it. It made mine run like crap