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[Susan Isaac]

right hand ex. manifold will start leaking at gasket in a period of a
couple of months.I have a set of heat shields and gaskets to install but
do not know and can anyone tell me location of heat shield and
gasket.Does heat shield go against head or manifold? Please help

Have A Good Day!

[351CJ]

As to the exhaust manifold leaking, it is a common problem with the 460's.
I replaced the exhaust manifold gaskets (and inevitably some of the broken
bolts) on my current and last (I stepped up to the 6 liter diesel) 460 truck
4 times within a half a dozen years. The last leak I decided to live with,
it has had the same small leak for over 2 years...

The Sheet metal heat shields were one of the biggest contributing causes of
CRACKED exhaust manifolds on the 460's. When I was a teenager I worked as a
parts puller in a wrecking yard, about 8 out of 10 460/429 exhaust manifolds
had cracks under the heat shields. These were the ones I pulled off of
generally unmolested Lincolns and pickup trucks. The heat shield bolt over
the exhaust manifolds, using threaded studs in some holes rather then bolts
for the exhaust manifold. I would not bother to put them back on if I was
you.

Good Luck

"Susan Isaac" <susaak@webtv.net> wrote in message
news:10916-41ADFECB-106@storefull-3216.bay.webtv.net...

[Frank from Deeeetroit]

Are your manifolds leaking at the head or at the connection to the exhaust
pipe? If they are leaking at the "donut" gasket to the exhaust pipe, then
check for a missing liner (for lack of the correct term) that slides inside
the exhaust pipe, from the cast iron manifold, for approximately 3-4 inches.
This liner keeps excessive heat from burning out the "donut" gasket and
causing a leak.

If your manifold leaks at the head, check your gasket. The gasket may be
laminated and should indicate a head side and a manifold side. A laminated
gasket installed backwards (left side on the right side, and vice versa) may
leak.

Good luck

Frank




"Susan Isaac" <susaak@webtv.net> wrote in message
news:10916-41ADFECB-106@storefull-3216.bay.webtv.net...

[William Isaac]

Thanks for the update! I have been debating with several other mechs, to
the cert. of the heat sheilds. To the time of this ex. leak, I was not
running any heat sheilds.I had discarded these years ago, then everyone
says You have to run em! This is my first leak since removal. I had
switched carbs 650 C- AFB to my stand-by Holley 500 V-S. I have
installed my afb again! Is it possible I was leaning out and running
higher temps pulling loads, and this made the gasket burn away? Would a
better gasket be calle for? What would that be? I used Fel-Pro or McCord
Would Mr. Gskt. Engine Works make a better Gskt. Being an old line
mech. I am thinking thickerer may be better, or Neo comp. Maybe some
other I have not heard of?
Numbers to You
wisack@webtv.net

[351CJ]

"William Isaac" <WISACK@webtv.net> wrote in message
news:3197-41B482FC-40@storefull-3218.bay.webtv.net...

[lugnut]

On Mon, 6 Dec 2004 10:04:12 -0600, WISACK@webtv.net (William
Isaac) wrote:

[pick one]

Check to make sure the manifold is not cracked, very common. With a new manifold
you will not need a gasket, it does not come with one from the factory.
"Susan Isaac" <susaak@webtv.net> wrote in message
news:10916-41ADFECB-106@storefull-3216.bay.webtv.net...