I purchased a 3.2 with 56,000 mi to replace the 3.0 that came with my wide body 911S. The 3.2 did not come with factory heat ducts and fan so I used a block off plate for a short period of time until I could develop a way of delivering heat to the cabin. I live in So. Ca. and the mornings and evenings can get a little nippy especially when granddaughter rides along.
My first task was to fabricate a hose adapter that would take the inside diameter of the factory heat boot down to a size that I could connect a standard 60mm heater hose. The adapter was fabricated out of fiberglass.
I purchased a used factory heat duct that channels hot air from the engine cowling to the auxillary fan located above the engine. The duct was cut as indicated on the following diagram and hole drilled with a 2 1/8" diameter hole saw. The open top of the duct was capped with fiberglass. Before applying fiberglass the area was roughed with 80 grit sandpaper and cleaned with grease and wax remover.
