Plgging Heat Exchanger Port into Engine Compartment, ... any issue with this? Options

[vesnyder]

Last night, instead of reconnecting the blower fan in the engine compartment, I sealed them off? It appears they are only there to provide a blower into the engine compartment - is this accurate? Any issues/problems with this? Heat still seems to come through - is this an integral component of the heating system?

Thanks

[Brando]

The fan in the engine compartment assists with blowing hot air into the cabin when engine RPMs are low, as though you're parked or in traffic.

If you blocked the ports right on the fan in the engine bay, it will not blow air into the HEs, but the cooling impeller on the front of the engine will blow hot air into the engine bay (bad). If you blocked the two ports that come up on the sides of the engine (the "J" heater tubes SLITS is describing) then you just won't get hot air into the cab when you pull the heater lever.

The heater lever on the center tunnel (between the seats) only works the blower in the engine bay and the cables to open the heater flapper boxes. It will only turn on the blower when it is fully up.