Re: Thingy

[Steve Stegmann <stegmann@domain.elided>]

The heat riser thingy works like this.  There is a passage for exhaust
through the heads and the intake manifold.  It is to heat the intake
manifold.  normally no exhaust gasses flow through this passage.  When the
engine is cold the heat riser (which is a butterfly valve to shut off the
exhaust flow in the starboard pipe) closes and the gasses flow through the
head and the manifold.

Steve

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Steven A. Stegmann
     _/_/_/    _/      _/_/_/ "No free man shall ever be debarred the use
   _/    _/   _/_/   _/    _/  of arms.  The strongest reason for the 
   _/        _/ _/   _/        people to retain the right to keep and bear
    _/_/    _/  _/    _/_/     arms is, as a last resort, to protect 
       _/  _/_/_//       _/    themselves against tyranny in government"
 _/    _/ _/    _/ _/    _/    
 _/_/_/  _/     _/ _/_/_/         Thomas Jefferson, June 1776
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On Tue, 2 Mar 1999, Chris and Ranae Procyk wrote:

> The thingy is a heat-riser valve.  It's on my '73, I don't know if they went
> to something else in '74 or if the PO just threw it away (sunny California).
> 
> I really never quite understood it.
> 
> In Use: 70 1210 4x4 TE, 73 1210 WM
> Project (2nd time) 67 1000B PU
> Parts: 67 1000B TA   68 1100 4x4 TA  72 1010 TA
> 
> 
>