And so do hot exhaust gases from a water heater. But if an exhaust vent slopes ... This vent is sloping upward until it connects to a vent pipe running up through the roof. The hot flue gas ...

It’s not going to work if you’ve got a car with a rectangular exhaust outlet, or if you’re driving around with a huge, ...

Another possible issue may be a manufacturing defect in the heater core feed pipe. This pipe may have incomplete machining at the exhaust manifold outlet pipe T-fitting. If this blockage is ...