Re: Sealing a log manifold to the head
[Re: 67_Satellite]
#911842
01/24/11 05:59 PM
01/24/11 05:59 PM
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Joined: Jan 2003
Posts: 28,071 Irving, TX
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Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,071
Irving, TX
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I never trusted Permatex to survive 1600+ degree heat. All kinds of gaskets from cheapies to soft copper were used on the hot rod but they always leaked. I never split the flange on these like I did on my last headers. Spliiting the old header flanges made it harder to install the headers due to the flex and they still leaked.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Sealing a log manifold to the head
[Re: 67_Satellite]
#911844
01/25/11 03:29 AM
01/25/11 03:29 AM
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Joined: Jan 2003
Posts: 2,933 Finalnd, Perkele
jyrki
master
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master
Joined: Jan 2003
Posts: 2,933
Finalnd, Perkele
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We have 1/2" flanges that were milled flat, no gaskets, only RTV. I think they might work even without RTV, but anyway, we have experienced no leaks.
Plynouth VIP '67 TT IC EFI
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Re: Sealing a log manifold to the head
[Re: jyrki]
#911845
01/25/11 11:14 AM
01/25/11 11:14 AM
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Joined: Jan 2003
Posts: 28,071 Irving, TX
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Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,071
Irving, TX
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My flanges are 1/2" cold rolled steel.
Jyrki, did you cut your flanges between the ports?
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Sealing a log manifold to the head
[Re: dOc …]
#911850
01/26/11 09:29 AM
01/26/11 09:29 AM
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Joined: Jan 2003
Posts: 2,933 Finalnd, Perkele
jyrki
master
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master
Joined: Jan 2003
Posts: 2,933
Finalnd, Perkele
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If you have a 0.001" gap between two particles it's way harder to blow through it than with a .040" gap. And if it really does happen, the .040" gap leaks significantly more than a .001" gap.
Plynouth VIP '67 TT IC EFI
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Re: Sealing a log manifold to the head
[Re: jyrki]
#911851
01/26/11 10:43 AM
01/26/11 10:43 AM
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Joined: Aug 2003
Posts: 11,179 Atco NJ
DJVCuda
I Live Here
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I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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www.remflex.comthey are good to 3000 F I'm a pipefitter by trade and the graphite used in these automotive gaskets is what we use for high heat / high pressure applications without failure.
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