kingofdodge7131

So question for those smarter than me. Why is the vgt turbo hooked into my heater hoses? And does blocking off the hoses hurt the turbo?

G1625S

AFAIK, the coolant serves to cool the electronics that operate the variable collar on the turbo. Blocking that off would likely lead to early failure of the control unit, I would imagine. The larger variable turbos (he4 or 551vgt) actually use the coolant for the bearing section of the turbo itself. I run a 3rd gen vgt on my 12v with no coolant or electronics and no problems as of yet. Hope this helps.

Blake Clark

VGT is cooled with the engines coolant system.

Im not sure if blockin off the heater hose would reduce the flow of coolant to the turbo but it is something that should be avoided.

The coolant that cools the turbo also cools the sensitive electronics that make the variable part of the turbo and the exhaust break part of the turbo function.

Blake Clark

Ya beat me to it!

kingofdodge7131

I'm trying to beef up the mega a/c haha. I'm just wondering if I shouldn't put a t in and swing it over to the coolant return line from the heater core so the flow stays the same but shuts off my core.

Blake Clark

I would say that if you could redirect the flow to bypass the heater core, but not affect the volume to the turbo you would be okay.

Where are you located at? Im in the heart of some of the hottest most humid weather in the country and have no real complaints with the a/c in my mega. It does take a few minutes to cool down when sitting in 95 degree plus heat all day, but once its cool, it will freeze you out.

And I'm the kinda person who keeps a vehicle and a home a/c on the "meat locker" setting!

Scotty

I could be wrong on this but I think the vgt on our trucks is just electronics cooled. Others have cooling for the turbo itself as well as the electronics.
I will see if Hohn can tell me for sure.

Scotty

Blake Clark

Oh Great and Wise Bomber to the North.


Yup, you are right Scotty. Just went and looked. The turbo itself is oil cooled. Line comes off the oil filter housing.

Electronics get the coolant treatment.

Scotty

I knew it wasn't the meds interfering. I just tried strutting around with my chest all puffed out...tripped and deflated.

EverydayDiesel

I am curious how bypassing the heater core is hurting the turbo or electronics?

Basically I have 4 hoses here

A. Heater core inlet
B. Heater core outlet
C. Engine Coolant outlet
D. Turbo coolant inlet

A and B are tied together to keep dirt out obviously.

Then C and D are hooked together but there is no flow impedance. If anything it flows more because its one less thing(heater core) to flow through. Am I missing something?

sabersix

Most folks want to shut off flow to the heater core in summer with a valve. The warning is that there is a second item in the heater hose routing (the turbo) that may be impacted if you install the heater core valve wrong.

Sent from my SCH-I510 using Tapatalk 2

Lil Dog

With the heater core bypass, there is some theory's similar to the EGR cooler bypass that the lack of coolant flow may cause head gasket issues. There isn't any concrete findings on this, but I know there are rumblings that the capping off of the coolant from the EGR cooler delete may contribute to issues with coolant flow through the head. I would assume similar issues may arise from this block off as well.

Jram91

Would it be possible to add a mechanical linkage to manually activate the exhaust brake?

safecracker909