Re: blocking heat crossover
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Re: blocking heat crossover



I cut two plates, approx. .030” thick, from a sheet of steel that you may obtain at your local hardware/Lowes/Home Depot.  Place them against the head (you may use some hi-temp RTV to tack them in place if you like) then lay the non-metal 318 Poly left/right intake gaskets over them and seal your manifold.
I have the non-metal gaskets if you need a pair.
Gary P.
 
Sent: Wednesday, August 10, 2016 5:58 PM
Subject: Re: blocking heat crossover
 
whats the best way to block it?
   neal
 
On Wed, Aug 10, 2016 at 12:52 PM, DAVID ORR <fe2orr@xxxxxxxxxxxxxx> wrote:
Have my 426 street wedge  crossover blocked for 15 years and no problems either in Pa. or Fl.


From: "Gary Pavlovich" <glpavlovich@xxxxxxx>
To: 1962to1965mopars@googlegroups.com
Sent: Wednesday, August 10, 2016 3:44:31 PM
Subject: Re: blocking heat crossover


Neal,
 
On all my personal engines and engine builds I always block the heat crossover passage to prevent superheating the plenum which causes cracks over time in cast iron manifolds and can pose the same problem in aluminum intakes.  Second reason is to prevent superheating the plenum to increase power – factory designed this for easy startup in cold weather.  Our winter temps are teens, twenties and thirties and I never run a choke and always block the heat crossover; no issues at all in any of my engines and one has been performing admirably for thirty years.
Gary Pavlovich
 
Sent: Tuesday, August 09, 2016 4:03 PM
Subject: blocking heat crossover
 
What are u guys doing with heat crossover, blocked or open? Moderate winters where i live, typically 30s or 40s at worst, rarely below 30. Just wondering before I swap manifold to  eddy performer.
   neal zimmerman, eugene oregon
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Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks!
 
1962 to 1965 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
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Dave O
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Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks!
 
1962 to 1965 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
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Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks!
 
1962 to 1965 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
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Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks!
 
1962 to 1965 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
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