[AT] JD 60 manifold gasket

[Ken Knierim]

Walt,
    I got that manifold hot enough that it burned through... is that
hot enough for you??? On that set of headers ('79 Camaro) I ran it on
the lean side (19 MPG highway, 350 chevy, 65+ MPH) and had put one of
the fiberglass "patches" around it next to #6 spark plug to prevent
burning the boot off the plug and shorting out the plug wire. It
burned through at the boot because the heat couldn't get out of the
header tube and we ended up cutting away and welding in a new piece of
tube, radiused differently to clear the spark plug.
     Certainly it would have made sense to machine the surface flat
but that would not work on a cheap set of headers... there isn't
anything flat ON them. So I used a different method and it worked, in
spite of your claims that it cannot. I drove that car over 200K miles
on that engine rebuild with that set of headers and I still have it
parked here. You're welcome to come by and visit and I will show it to
you... AND THE HEADERS SEALED WITH SILICONE ULTRA COPPER.
    I DO know exhaust gets hot. I've learned to respect it and deal
with it in ways that are different than you. But don't tell me it
won't work WHEN I HAVE THE PROOF. I think most folks agree that
machining the parts flat is the high road, but as you inferred,
sometimes you cannot get the parts necessary. I am pointing to a
different option. You might find I have made it my life's work to take
on jobs that "can't be done" and I take great pride in proving it can
be done, by lunchtime.

Ken in AZ





On 4/29/06, DAVIESW739 at aol.com <DAVIESW739 at aol.com> wrote:
> Ken you get that exhaust temp up to red hot and see if your high temp stuff
> will hold.  These older tractors have a bad habit of running very hot  exhaust
> manifold.  The best solution to a good seal is proper preparation  and
> correct gaskets these will last a long time. I know everyone wants a short  cut but
> why do it that way and take a chance on something else happening like
> cracking the manifold. You just can't find these parts lying about all over the
> place you know what I mean.
> Someone said to have the manifold machined flat I think that's about the
> only good advice I have seen so far on the list about this.
> I have two manifolds for my Case LA both are cracked due to heat and
> improper installation.
> I not trying to start something here I just want those who are new to this
> type of work what is the best way to go about it.  Sometime you just  have to
> bite the bullet and spend the extra money to do something correctly.
> Have you ever seen any of these new fangled sealants on something that came
> from the factory. They don't use them and I don't unless they specifically
> call  for it.  I have never seen anything other than a gasket on an exhaust
> manifold.
>
> Walt  Davies
> Cooper Hollow Farm
> Monmouth, OR 97361
> 503 623-0460
>
>
>
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