Hi all

Got my front heater core taken apart and cleaned. There is a metal sheet
inside the ducting that allows air to only blow over about 30-40% of the
heater core. In other words, a lot of the core is blocked off from the air
movement, probably rendering it unused. I would like to drill a couple large
holes in it so as to get more heat if I choose. Any ideas why I should NOT
drill a couple large air venting holes or why this would not give me more
heat?

Myron Lind
82 Diesel Westy getting mechanical TDI]
81 Westy