Coolant leak, I’m stumped

[SteelWagon88]

2021 Power Wagon, Has coolant leaking behind engine block and onto transmission. Oil not milky. Reservoir drains under engine load greater than 2,000 rpm. No visible leaks on or around water pump and thermostat housing. Would a failed intake manifold gasket cause this? Also, heater in cab does not provide consistent and reliable heat. Would love some input on this, thanks guys.

Also if there is a thread already pertaining to this, could you attach a link? I’m new to online forums.

 

[Raz175]

There a couple of rubber coolant lines under the intake manifold for the EGR. These can develop a leak and run down the back of the engine. Somewhat common area for a leak. Bad part is you have to remove the intake manifold to fix it.