[Elbert]

Normally people bypass the rear heater core under the hood where the heator control valve is or where the hoses connect to the hard line around the fire wall (where they connect to the two hoses running to the rear heater core). You disconect the hoeses that feed the rear heater core and then connect the hardline with a new section of heater hose that makes a loop and just feeds the outgoing pipe back into the "incomoing Pipe".

Seems like you would want this to work though...living in the "Great White North"... I would. My suburban takes a while to heat up, even way down here in AL.

I would see about getting it fixed first...before bypassing.