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Re: header gasket update
[Re: DJVCuda]
#1478746
08/03/13 12:04 PM
08/03/13 12:04 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
OP
Not enough dumb comments...yet
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OP
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Remflex.com
They seal issues like that.
what makes them different than the soft aluminum? I just asking because if there isn't enough weld to seal the aluminum how is the stel going to be any better?
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Re: header gasket update
[Re: Mr.Yuck]
#1478749
08/03/13 03:43 PM
08/03/13 03:43 PM
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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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A buddy had a small block on the dyno with a cheap set of headers. The headers were drilled too low so they had a gap at the bottom of all the ports. We are talking about an 1/8" gap where you can see inside the exhaust port. Junk headers
He went through a Few sets and then I gave him my set of remflex . They sealed it. And never showed any signs of fatigue.
Post a pic but if your issu is at the sealing surface it will seal.
Last edited by DJVCuda; 08/03/13 04:10 PM.
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Re: header gasket update
[Re: blownEFI]
#1478754
08/03/13 06:21 PM
08/03/13 06:21 PM
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Joined: Jan 2003
Posts: 21,072
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
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Mr Gasket Ultras.Thats all we use.Mine were on for 9 years and now with the new heads 4 or 5 years.No leaks ever We run them on all the cars with headers.My kids truck I had them on and off 3 times and still they sealed.Rocky
Chrysler Firepower
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Re: header gasket update
[Re: therocks]
#1478755
08/03/13 07:19 PM
08/03/13 07:19 PM
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Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
HEMIFRED
master
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master
Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
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99% of exhaust leaks from headers does not come from poor gaskets.
Warped flanges that do not lay flat against the head are #1. The simplest solution is to split the flanges between each cylinder. That way you pull down one cylinder at a time with no interference from adjacent tubes. As long as each tube's weld is flat it will seal fine.tubes with surfaces not parallel to the others are the cause of leaks
home of the
Sox and Martin Hemi Duster
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Re: header gasket update
[Re: HEMIFRED]
#1478756
08/03/13 08:59 PM
08/03/13 08:59 PM
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Joined: Jan 2003
Posts: 926
MICHIGAN
BB65Barracuda
super stock
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super stock
Joined: Jan 2003
Posts: 926
MICHIGAN
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I use the Percys dead soft aluminum seal 4 good gaskets. Ive even reused them and they still work great. 
1957 Power wagon wm300 original 10.000 mile truck, 1964 dodge Polara Convertible numbers matching
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Re: header gasket update
[Re: Thumperdart]
#1478760
08/04/13 09:12 AM
08/04/13 09:12 AM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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Quote:
Roadhazard's header gaskets are very nice, now I need to talk him into making them for 360-1s
Thanks Tony
Quote:
Didn`t know he made those............they will be my next choice since his valve cover gaskets rock......... 
Thanks Dom! Guess the valve cover gaskets are still working "OK" after a few years 
Hemifred has brought up the important points. The flange should always be checked for flatness and quality of finish for the welded sealing beads.
Mr.Yuck, seems you are having some serious issues with getting yours sealed. And from what I gathered your exhaust guy welded everything together and now your stuck with not being able to get them back out to fix the flanges??
If so get yourself some Remflex gaskets ($$$$) they will conform some and seal a flange that is less than ideal 
Same base material as I use but these are about 3 times thicker and don't have a perforated steel carrier. So check your clearances for using a thicker gasket in your application 
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Re: header gasket update
[Re: HEMIFRED]
#1478761
08/04/13 10:29 AM
08/04/13 10:29 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
OP
Not enough dumb comments...yet
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OP
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
99% of exhaust leaks from headers does not come from poor gaskets.
Warped flanges that do not lay flat against the head are #1. The simplest solution is to split the flanges between each cylinder. That way you pull down one cylinder at a time with no interference from adjacent tubes. As long as each tube's weld is flat it will seal fine.tubes with surfaces not parallel to the others are the cause of leaks
these are cut... don't see how you can cut between 3/5 thou (were the leak is).
Roadhaz... I don't mind the $43 for the Rem's I just don't want to put off what might need to be done anyway. The 1st set of Fel-pro 1414's lasted a good 100+ miles and were fine until the 5 run of the night when I noticed a slight leak, 2nd round of elims blew it all the way out. The percy's leaked at 1st start up. FWIW they seem to be blowing out at the top on 3/5...pass side still has the original Fel-pro 1414's.
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Re: header gasket update
[Re: Mr.Yuck]
#1478762
08/04/13 10:32 AM
08/04/13 10:32 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Metal expands when heated.. we all know this... so give it the room to expand and dont let it warp the flanges... if you give each tube a slip area it will slip instead of warping.. by that I mean drill one of the mounting holes larger(per tube).. if you have 3 holes per tube drill out 2 of the holes to slide.. you keep 1 hole to locate the tubes..I like a gragfoil (graphite on stainless material) to let it slide easy... cut each flange from each other (ends are cut from the center tubes)... all it takes for a leak is just a small amount of compression loss at the flange to get it started and it progressively gets worse with each heat cycle... cheapo (thin) flanges make it much easier to warp... thats why I use 3/8" flanges on all the headers I build 
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Re: header gasket update
[Re: MR_P_BODY]
#1478763
08/04/13 10:38 AM
08/04/13 10:38 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
OP
Not enough dumb comments...yet
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OP
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Metal expands when heated.. we all know this... so
give it the room to expand and dont let it warp the
flanges... if you give each tube a slip area it will
slip instead of warping.. by that I mean drill one
of the mounting holes larger(per tube).. if you have
3 holes per tube drill out 2 of the holes to slide..
you keep 1 hole to locate the tubes..I like
a gragfoil (graphite on stainless material) to let
it slide easy... cut each flange from each other
(ends are cut from the center tubes)... all it takes
for a leak is just a small amount of compression loss
at the flange to get it started and it progressively
gets worse with each heat cycle... cheapo (thin) flanges
make it much easier to warp... thats why I use 3/8"
flanges on all the headers I build
Heat wasn't an issue this time as it leaked from frist fire up. These are pretty thick, they are Hooker Supercomps. They are 2 piece and 1-3 flange is cut and 7 is t he slip-fit tube. But I'll try and drill one hole a tad bigger on the 3 side of the header.
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