Aluminum in the crossover

[dean hanson]

Just a word of experience. I had Mondello in Paso Robles fill my crossover
years ago. The heat from my engine melted their filler material and it took
out several valves. They gave me a new intake manifold with different fill
material. No, I don't know/remember what material it was but just a word of
caution. The temperature you have to melt the filler material has to be
substantially hotter than the heat your engine makes.



Dean C. Hanson

The Resourceful Norse

75 Avion Phoenix (Rising from a 10 year sleep)

Fremont, Ca

 

[jim kanomata1]

Most people h a small equation to consider.ave no clue what a motor home
goes through.
Weight is only asmall part . it is the Aerodynamic drag as the Frontal area
is great as acts like a brake all the time as it moves.
Hot rodders and light truck people goof up and also wonder why the engines
in our coaches fail .
I figured it out having had few in the last 35 years.
What seems to work so far is the way our Springfield/Patterson Intake Block
Kit is designed. We provide several weekly .

On Fri, Jul 27, 2018 at 9:05 AM, Dean Hanson
wrote:

> Just a word of experience. I had Mondello in Paso Robles fill my crossover
> years ago. The heat from my engine melted their filler material and it took
> out several valves. They gave me a new intake manifold with different fill
> material. No, I don't know/remember what material it was but just a word of
> caution. The temperature you have to melt the filler material has to be
> substantially hotter than the heat your engine makes.
>
>
>
> Dean C. Hanson
>
> The Resourceful Norse
>
> 75 Avion Phoenix (Rising from a 10 year sleep)
>
> Fremont, Ca
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[emerystora]

Some have said that it is Aluminum. Mondello’s material was actually a zinc alloy.
Several years back I had bought it and filled mine but they didn’t tell me to use the stainless steel block off plates.
I found that the exhaust heat had melted about 1/2” of the fill. No engine damage but I added the block off plates from Dick Paterson and had no problems
I used that manifold on my last engine rebuild 1-1/2 years ago..

Emery Stora
77 Kingsley
Frederick, CO

>
> Just a word of experience. I had Mondello in Paso Robles fill my crossover
> years ago. The heat from my engine melted their filler material and it took
> out several valves. They gave me a new intake manifold with different fill
> material. No, I don't know/remember what material it was but just a word of
> caution. The temperature you have to melt the filler material has to be
> substantially hotter than the heat your engine makes.
>
>
>
> Dean C. Hanson
>
> The Resourceful Norse
>
> 75 Avion Phoenix (Rising from a 10 year sleep)
>
> Fremont, Ca
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[Ken H.]

I too saw a little erosion of the Mondello zinc, though not to the extent
to call it "melting". Like Emery, I added the SS plates to protect the
zinc. That manifold is still on the engine in Alan's X-PB, and has at
least another 50,000 miles on it with no problems.

Ken H.

On Fri, Jul 27, 2018 at 1:42 PM Emery Stora via Gmclist <

> Some have said that it is Aluminum. Mondello’s material was actually a
> zinc alloy.
> Several years back I had bought it and filled mine but they didn’t tell me
> to use the stainless steel block off plates.
> I found that the exhaust heat had melted about 1/2” of the fill. No
> engine damage but I added the block off plates from Dick Paterson and had
> no problems
> I used that manifold on my last engine rebuild 1-1/2 years ago..
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
>
>
> > On Jul 27, 2018, at 10:05 AM, Dean Hanson

> >
> > Just a word of experience. I had Mondello in Paso Robles fill my
> crossover
> > years ago. The heat from my engine melted their filler material and it
> took
> > out several valves. They gave me a new intake manifold with different
> fill
> > material. No, I don't know/remember what material it was but just a word
> of
> > caution. The temperature you have to melt the filler material has to be
> > substantially hotter than the heat your engine makes.
> >
> >
> >
> > Dean C. Hanson
> >
> > The Resourceful Norse
> >
> > 75 Avion Phoenix (Rising from a 10 year sleep)
> >
> > Fremont, Ca
> >
> >
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[kosier]

Ken,

I followed the advice of the guys on the Cadillac Power Forum and poured
the exhaust crossover in the heads full of melted pistons. I am a little
curious as to how it's survived because the EFI manifold (not installed)
has got all the crossover milled off the bottom. I wanted to get rid of
any and all unnecessary weight.

Gary Kosier
77PB w/500Cad
Newark, Ohio

--------------------------------------------------
From: "Ken Henderson"
Sent: Friday, July 27, 2018 1:50 PM
To: "GMC Mail List"
Cc:
Subject: Re: [GMCnet] Aluminum in the crossover

> I too saw a little erosion of the Mondello zinc, though not to the extent
> to call it "melting". Like Emery, I added the SS plates to protect the
> zinc. That manifold is still on the engine in Alan's X-PB, and has at
> least another 50,000 miles on it with no problems.
>
> Ken H.

 

[robert mueller]

G'day,

Mondello sells a material that is used to fill engine blocks for drag strip engines. I've got some here in Houston and if I ever get to it I'll try
using it (belt) and block off plates (suspenders) on a manifold ans see what happens. I also have a material called Hardblok which does the same
thing.
--
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426