thestuarts
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- Joined
- Jun 10, 2019
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I don't know how effective it would be on the output side. My preference would be on the input side, but I have no real reason as to why it would have to be there. With a valve on the input side only, the heater core would still see the pressure of the cooling system and some warm coolant through the output hose, but avoid positive hot flow in. Seems they have plenty of industrial versions of this engine that don't have a heater core and the heater core output plugged at the head.
My thought was to get a compact shutoff valve, that could be stuck on the input side, and be shielded a bit more from the heat of the exhaust and turbo. In my head it would go like: engine head -> heater core connector -> very small section of heater hose to couple connector to valve -> original unmodified hose to valve output. This would allow a quick return to stock if there ever was any need. When I had it disconnected the other day, I had enough play to pull it toward the front of the truck and would have been able to easily access the clamp. There also seems to be enough play in that hose to add an inch or two and not negatively affect anything.
I agree with the concern about heat on the turbo/exhaust side. Even the factory tubing on that side is wrapped in heat shielding.