<VV> Block Off Plates & USA visit

Bryan Blackwell bryan at skiblack.com
Wed Feb 22 16:08:20 EST 2017

Hi Carl,

Yes, back by #5 cylinder is a hose that feeds 'cool' air to the heater box.  The object is that when you move the 'Heat' control to something less than full, this air is mixed with hot air from the engine.  However, that hose also represents a big leak for #5, so although the heater doesn't work quite as intended, the piston/rings/valves on #5 live longer as a result.

Installation is simple, remove that hose adapter, then the plate is sandwiched between the hose adapter and the top shroud.

Enjoy the trip!


> On Feb 22, 2017, at 3:39 PM, Arlette Pat via VirtualVairs <virtualvairs at corvair.org> wrote:
> I 'think?' I purchased this plate from Clarks Corvair Parts some time back. The purpose of this plate as I understand it, is to block off an air hose that from all accounts is not required. The benefit of blocking this hose off is that apparently it improves cooling capacity to the engine.
> Anyway dispite searching the web and looking over our Corvair engine, I can't see where this plate should be installed. It's shape does not help either. I am guessing that the long oval shaped hose is the one that many block off to improve cooling but I wondered what the down side is of doing this?

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