Re: Exhaust Spring-actuated valve thingy

[Tom Mandera <tsm1@domain.elided>]

So, I should've noticed the fact that I removed the heat riser when I
put my 304 in?  ;-)  The dual exhaust lacks heat risers on either side..
for that matter, the hose from the "stove" on the manifold to the air
cleaner has been removed as well.. it was broken a while ago, and I
haven't replaced it... truck seemed to run just fine at -20... ;-)

Daniel Nees wrote:
> 
> Michael,
>    That is the 'Heat Riser' and you should have one on at least your
> Scout. It blocks the exaust off when the truck is cold and surkulates it
> through the manifold to help warm the engine up. When the spring gets
> warm it opens up opening the valve. There should be a plate of metal
> like a throttle plate on that 'axle'. It isn't 'really' important to
> have one when you live in SD or SF, but if you lived where it gets cold
> once in a while you would notice.