by fangsport » Sun Apr 03, 2005 4:06 pm
depending on the vehicle, the hose may need to flow. i have removed the heater unit on the rally car(dumb idea, rally is a winter sport!), and had to keep the flow due to the outlet position on the head. if the pipe was blocked off, it would have caused a build up of heat around the #4 piston, not to mention a build in scale around the same piston.