The Corvair uses a set of shrouds and then some strips of insulating material to keep the heat and exhaust from under the car from being recirculated back into the engine as well as not going into the car.

There are several shrouds, including two that I still have left on the car. I hesitiate to remove them since they're the ones that pass hot air back into the cabin, and the open up a sizable hole. Too many little critters running around that may want to make a nest in there, so I'll save that until just before I'm ready to re-install them.

 

Corvair Home Engine Shrouds    
Carbs! Generator rebuild Electrolysis for parts cleaning....the experiment Engine Pics

 

Shrouds
The engine with the shrouds still on. There are some of the old engine seals there and some missing (you can see the ground on the left side)

Shrouds off except the rear. Had to remove the battery positive from the starter and hen wiggle it over the other parts.
All the top shroud are now gone.

This is the throttle linkage. I found that I had to disconnect it to get the very top shroud off. I'm getting to know the Corvair more with every project.

The lower shroud that's under the engine. Protects the headers, the guide rods, etc. Never though it would have that much debris in it. Good idea to get these off and clean them.
The previous shroud covers the headers and other parts. You can see that something was living in there. Good idea to take the shrouds off any old Corvair to see what sort of flammable pieces are left around.