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heat riser passage block off methods
#1264721
07/09/12 01:59 PM
07/09/12 01:59 PM
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Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
dave571
OP
master
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OP
master
Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
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Interested in what has worked for others. Application is an iron 383 manifold I've been contemplating using large quantities of JB weld. I know they make a gasket that does it, but it'll take too long to get. Share your story Thanks 
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Re: heat riser passage block off methods
[Re: RapidRobert]
#1264724
07/10/12 09:22 AM
07/10/12 09:22 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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Quote:
wadded up ball of aluminum foil 
I have a buddy do this on his 400 just a couple weeks ago, he was tuning it as it had developed a miss... must have been the shreded alum foil that was being spit out the open header. 
yes,he has the heads off now doing a VJ on them. 
***best way on a BB is to get the felpro HP valley pan with the heat blocked off and use the 4 thin gaskets with it.***
on my SB I have used soup can lids to cut patches out. the MP-block offs are a tad to thick and mine intake bolts kept comeing loose.
I have some thin metal block offs on there now from a radio cover/shell and the 440 has the felpro HP valley pan.
results vary,good luck.
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Re: heat riser passage block off methods
[Re: Fury Fan]
#1264728
07/10/12 10:34 AM
07/10/12 10:34 AM
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Joined: Sep 2004
Posts: 2,091
oberlin, Ohio
Rapid340
top fuel
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top fuel
Joined: Sep 2004
Posts: 2,091
oberlin, Ohio
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Mopar Performance had offered an intake manifold gasket with two thick (.040-.050) shims to block the heat crossover on small blocks. I never used this kit due the the shims being so thick. What I do is find a large aerosol can and cut my own shims. The ones I have used where about .011 thick. I have done this MANY times and never had a problem. 
1971 Factory Appearing Duster 340 11.000 @ 122 mph
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Re: heat riser passage block off methods
[Re: Fury Fan]
#1264729
07/10/12 01:50 PM
07/10/12 01:50 PM
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Joined: Jun 2008
Posts: 3,916
usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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Quote:
Is that something you made, Lewis? If so, what do you have in mind for connecting to it?
i made it. i don't connect anything to it. just manually open and close as needed.
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Re: heat riser passage block off methods
[Re: lewtot184]
#1264730
07/10/12 04:45 PM
07/10/12 04:45 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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Quote:
turn it off, turn it on.
now thats thrifty... 
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Re: heat riser passage block off methods
[Re: BulletBob]
#1264733
07/10/12 09:31 PM
07/10/12 09:31 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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I usually use JB Weld to close them up. Been running a Performer that way for about 10 years now.
Mix up half a tube each, pour it in one side, tape off the opening, set the intake so that the taped off opening is setting on the workbench, let it harden. Use the remaining JB Weld on the other side once side one is done, remove tape, install.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: heat riser passage block off methods
[Re: IronWolf]
#1264736
07/12/12 07:27 PM
07/12/12 07:27 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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Quote:
Balled up big wads of aluminum foil and stuffed them down in there. Crude and effective, kind of keeping with these old Mopars' spirit.
I remember someone on this board post about stuffing it with 100 dollor bills along with that alum foil,so it would pay hiim for the rebuilding of the heads. 
ask my buddy that is waiting for his 4oo BB heads back from the machine shop after spitting the alum out the header collectors
results will vary.
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Re: heat riser passage block off methods
[Re: scratchnfotraction]
#1264738
07/13/12 09:03 AM
07/13/12 09:03 AM
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Joined: Dec 2006
Posts: 3,533
Indiana
Fury Fan
master
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master
Joined: Dec 2006
Posts: 3,533
Indiana
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Quote:
I remember someone on this board post about stuffing it with 100 dollor bills along with that alum foil,so it would pay hiim for the rebuilding of the heads.
I remember that one too, and I've quoted that in threads like this. The original guy that said it I believe goes by the name 'Paymelater' or something like that, which is funny too.
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Re: heat riser passage block off methods
[Re: dave571]
#1264739
07/13/12 09:10 AM
07/13/12 09:10 AM
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Joined: Jan 2007
Posts: 404
Central New York
bfury
mopar
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mopar
Joined: Jan 2007
Posts: 404
Central New York
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Back in the day, we used to shove balls of aluminum foil into the head and then cover with a thin patch of sheet metal. Then we would wire the crossover valve in the manifold open or drill it out, tap the holes and put bolts in. Always worked fine. With todays gas, this is a must to do since the added heat evaporates the fuel.
No Stock
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