Re: [FWDLK] exhaust manifold back thru the intake manifold and over to the other exhaust

[Roger Howard <rhoward@xxxxxxxxxxxx>]

...ooops, that sheetmetal pan must be on the 318 intake. The 361 intake has
a passageway from one side to the other, passing directly under the area
where the carb attaches...and so I learn, by fits and starts...thanks!
----- Original Message -----
From: "Roger Howard" <rhoward@xxxxxxxxxxxx>
To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
Sent: Monday, April 09, 2001 9:21 PM
Subject: Re: [FWDLK] exhaust manifold back thru the intake manifold and over
to the other exhaust


> Richard's reply makes sense. I have heard of the term "crossover", but I
> have never taken the time to  figure out how exhaust gas could travel thru
> the INTAKE manifold... there must be separate, distinct passages in the
> intake manifold? Do 318's, 361's and 383's all function the same way (that
> is- have distinct passages).
> Come to think of it, the intake manifold on my 361 has a sheetmetal pan on
> its underside, and under that pan is a BUNCH of oily, sooty crud....
> Guess I need to go to engine school...
> RogerH
> ----- Original Message -----
> From: "Richard" <56fury@xxxxxxxxxxxx>
> To: "Roger Howard" <rhoward@xxxxxxxxxxxx>
> Sent: Monday, April 09, 2001 8:50 PM
> Subject: exhaust manifold back thru the intake manifold and over to the
> other exhaust
>
>
> > When the heat riser valve is closed that side's exhaust crosses in the
> > intake manifold to the opposite exhaust.  The point is to heat up the
> > carburetor and air/fuel mixture fast and get the gasoline vaporizing
> better.
> >
> > Richard
> >
> >
> > ----- Original Message -----
> > From: "Roger Howard" <rhoward@xxxxxxxxxxxx>
> > To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
> > Sent: Monday, April 09, 2001 8:31 PM
> > Subject: Re: [FWDLK] exhaust manifold butterfly
> >
> >
> > > List,
> > > In an effort to reply to Larry's question, I went out to the garage
and
> > > checked out an exhaust manifold from a 318. The butterfly valve inside
> > will
> > > "open" the passage about 1/3 if you turn the shaft counterclockwise,
but
> > the
> > > counterweight and spring are set up so that the valve is completely
open
> > > when the shaft turns fully clockwise and a tang on the  counterweight
> > > contacts a 'stop'.
> > > Larry says he lives in a warm climate and doesnt need this warmup
> feature.
> > > Larry seemed to think that this butterfly diverted hot exhaust from
the
> > one
> > > exhaust manifold back thru the intake manifold and over to the other
> > exhaust
> > > manifold. Is this correct? I thought the valve just basically
restricted
> > the
> > > speedy exit of the hot exhaust, thereby spreading heat thruout the
> engine
> > > block. Eventually, the heat warmed  the thermostatic spring, which
> rotates
> > > the valve open. At the same time, the spring-controlled carb choke had
> > > warmed and opened,  and now your engine was all warmed up and running
> > smooth
> > > as silk..
> > > RogerH
> > > ----- Original Message -----
> > > From: "larry gardinier" <gardinier@xxxxxxxxxxxxxx>
> > > To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
> > > Sent: Sunday, April 08, 2001 10:41 AM
> > > Subject: [FWDLK] exhaust manifold butterfly
> > >
> > >
> > > > I took my 58 Savoy out for it's maiden voyage the other day. It
drove
> > > > nice but after a couple miles it overheated. The hoses look new, the
> > > > waterpump is new and the belt is fine.  After the car cooled down
> > > > overnight I started it up and felt the intake manifold, it was hot
> > > > around the choke and cool around the intake ports. The butterfly was
> > > > definitly frozen, I've since loosened it up with some penetrating
oil
> > > > and I want it to stay open. Question is, What's open? All the way
> > > > clockwise? or all the way counter-clockwise?
> > > >  Thanks to all,
> > > >  Larry Gardinier
> > > >
> >
>