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Hedman Headers leak like crazy!!!!! #112268 08/29/08 09:23 PM 08/29/08 09:23 PM
Joined: May 2007 Posts: 64 san diego, ca D dakrt23 OP member
dakrt23 OP member D Joined: May 2007 Posts: 64 san diego, ca	So i finally got my 360 dart running and everything is working perfectly, the car is awesome, except these damn headers will not seal... i have taken it to two different exhaust shops, one that switched my cheesy bolts to studs and better gaskets and they still leak LOUDLY, like i can hear it over dumped spintech pro-street mufflers... thats bad... both places told me the flanges are just too weak to provide any flat mating surface... looked it up on summits site and they have a 1/4" flange vs. 5/16" for everyone else... the question is... is there anyway to get these hedmans to seal up without cutting off this flange and welding on a newer thicker one, or switching headers?... if there isnt, then ill end up biting the bullet and switching, but if anyone has any tips or tricks with these headers in particular, let me know!... thanks...

Re: Hedman Headers leak like crazy!!!!! [Re: dakrt23] #112269 08/29/08 09:33 PM 08/29/08 09:33 PM
Joined: Apr 2007 Posts: 2,327 Glendale, AZ 6 69L78Nova Banned. Forever.
69L78Nova Banned. Forever. 6 Joined: Apr 2007 Posts: 2,327 Glendale, AZ	Use Ultra-Seal gaskets, and a film of copper silicone on both sides. My old set of Hedmans sealed right up using that method 1969 Nova 454/M21/3.31 Mild mid-11 second weekend cruiser 1994 F150 XLT Super Cab 2WD 5.0/4R70W/3.55 (Daily driver)

Re: Hedman Headers leak like crazy!!!!! [Re: 69L78Nova] #112270 08/29/08 09:52 PM 08/29/08 09:52 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Are they new headers ? 1/4" is pretty good compared to header flanges years ago. Mine are Hedman that have been on my car for 2 years with zero problems and I just use standard gaskets. Ron

Re: Hedman Headers leak like crazy!!!!! [Re: 69L78Nova] #112271 08/29/08 10:02 PM 08/29/08 10:02 PM
Joined: May 2007 Posts: 64 san diego, ca D dakrt23 OP member
dakrt23 OP member D Joined: May 2007 Posts: 64 san diego, ca	cool, thanks ill give that a try!!!... using standard paper gaskets now, definitely going to try a steel core gasket next... never liked paper ones, they just came with the headers...

Re: Hedman Headers leak like crazy!!!!! [Re: 383man] #112272 08/29/08 10:04 PM 08/29/08 10:04 PM
Joined: May 2007 Posts: 64 san diego, ca D dakrt23 OP member
dakrt23 OP member D Joined: May 2007 Posts: 64 san diego, ca	after looking around summits site, all the other headers (Even summits generic ones) had 5/16" flanges... hedmans were the weakest at 1/4"... seems to be hit and miss with these things... a friend has a set of hedmans on his 67 cuda and they are fine... mine sound horrrrrrible... its all i can hear and it makes driving the car not fun...

Re: Hedman Headers leak like crazy!!!!! [Re: dakrt23] #112273 08/29/08 10:10 PM 08/29/08 10:10 PM
Joined: May 2006 Posts: 2,046 ky. K kenworth_goose top fuel
kenworth_goose top fuel K Joined: May 2006 Posts: 2,046 ky.	If you take those paper gaskets and soak them overnight in water, install them wet, they won't leak anymore.

Re: Hedman Headers leak like crazy!!!!! [Re: dakrt23] #112274 08/29/08 10:10 PM 08/29/08 10:10 PM
Joined: Dec 2003 Posts: 2,042 Leucadia, Ca. V vdriver top fuel
vdriver top fuel V Joined: Dec 2003 Posts: 2,042 Leucadia, Ca.	Do your heads have the air injection holes on the floor of the ports, & if so, did you plug them?

Re: Hedman Headers leak like crazy!!!!! [Re: dakrt23] #112275 08/29/08 10:14 PM 08/29/08 10:14 PM
Joined: Jan 2007 Posts: 953 Badham Co. Y Y3 70 BEE super stock
Y3 70 BEE super stock Y Joined: Jan 2007 Posts: 953 Badham Co.	Do a search for REMFLEX gaskets. The best choice for a thin or warped to s header.

Re: Hedman Headers leak like crazy!!!!! [Re: Y3 70 BEE] #112276 08/29/08 11:18 PM 08/29/08 11:18 PM
Joined: Jan 2003 Posts: 5,186 Wherever I am. J Junky master
Junky master J Joined: Jan 2003 Posts: 5,186 Wherever I am.	Quote: Do a search for REMFLEX gaskets. The best choice for a thin or warped to s header. Best darn gaskets I've ever tried! www.remflex.com 2010 Black Challenger SE <> 3.5 V6 Custom Shift Knobs www.flameball.com Check It Out

Re: Hedman Headers leak like crazy!!!!! [Re: kenworth_goose] #112277 08/29/08 11:48 PM 08/29/08 11:48 PM
Joined: May 2007 Posts: 64 san diego, ca D dakrt23 OP member
dakrt23 OP member D Joined: May 2007 Posts: 64 san diego, ca	ive heard that trick too, thanks for the input... ill probably just end up trying some steel core gaskets or these remflex ones everyone is suggesting...

Re: Hedman Headers leak like crazy!!!!! [Re: vdriver] #112278 08/29/08 11:50 PM 08/29/08 11:50 PM
Joined: May 2007 Posts: 64 san diego, ca D dakrt23 OP member
dakrt23 OP member D Joined: May 2007 Posts: 64 san diego, ca	pretty sure there are no air injection ports... i didnt see anything unusual when i was painting the heads.. are they located just below the exhaust ports?...

Re: Hedman Headers leak like crazy!!!!! [Re: Y3 70 BEE] #112279 08/29/08 11:51 PM 08/29/08 11:51 PM
Joined: May 2007 Posts: 64 san diego, ca D dakrt23 OP member
dakrt23 OP member D Joined: May 2007 Posts: 64 san diego, ca	just checked those out, they have some pretty strong claims... no leaks, no retorquing (thats hard to believe)... pretty pricy for gaskets but if they work they will be worth it... have they worked for you as advertised?...

Re: Hedman Headers leak like crazy!!!!! [Re: Junky] #112280 08/29/08 11:52 PM 08/29/08 11:52 PM
Joined: May 2007 Posts: 64 san diego, ca D dakrt23 OP member
dakrt23 OP member D Joined: May 2007 Posts: 64 san diego, ca	have they worked for you as advertised?... they have some big claims to go with the big price... what do you think?... thanks for the help...

Re: Hedman Headers leak like crazy!!!!! [Re: kenworth_goose] #112281 08/29/08 11:55 PM 08/29/08 11:55 PM
Joined: Oct 2003 Posts: 2,537 PORT ALBERNI , BC., CANADA superwrench master
superwrench master Joined: Oct 2003 Posts: 2,537 PORT ALBERNI , BC., CANADA	Quote: If you take those paper gaskets and soak them overnight in water, install them wet, they won't leak anymore. I've heard of that...but..I think it depends on whose gaskets.....one fellow I know used a brand X gasket and they were pretty well mush when he went to get them in the morning after an overnight soak!! A good felpro 1414 for a big block and some Ultra-Copper RTV and you'll usually be good to go for a long time. Give the bolts a nudge after about 10 runs or so.

Re: Hedman Headers leak like crazy!!!!! [Re: dakrt23] #112282 08/30/08 12:02 AM 08/30/08 12:02 AM
Joined: Jan 2007 Posts: 953 Badham Co. Y Y3 70 BEE super stock
Y3 70 BEE super stock Y Joined: Jan 2007 Posts: 953 Badham Co.	I sealed up some c body cast manifolds that no ultra seal or anything else would seal. When you see how beefy remflex are you will see why.

Re: Hedman Headers leak like crazy!!!!! [Re: Y3 70 BEE] #112283 08/30/08 01:15 AM 08/30/08 01:15 AM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	I've been hearing good things about remflex for years, but never did try them. It is quite a bit for exhaust gaskets, but if they work, well worth the money IMO.

Re: Hedman Headers leak like crazy!!!!! [Re: dakrt23] #112284 08/30/08 02:45 AM 08/30/08 02:45 AM
Joined: Dec 2003 Posts: 2,042 Leucadia, Ca. V vdriver top fuel
vdriver top fuel V Joined: Dec 2003 Posts: 2,042 Leucadia, Ca.	Quote: pretty sure there are no air injection ports... i didnt see anything unusual when i was painting the heads.. are they located just below the exhaust ports?... If your heads have these holes, and they ain't plugged, you're wasting your time with different gaskets/headers/whatever. You gotta plug 'em.: 4651714-DCP07427.JPG (197 downloads)

Re: Hedman Headers leak like crazy!!!!! [Re: vdriver] #112285 08/30/08 03:19 AM 08/30/08 03:19 AM
Joined: Jan 2003 Posts: 11,500 delivering your oil nutso suave I Live Here
nutso suave I Live Here Joined: Jan 2003 Posts: 11,500 delivering your oil	an old hot rodder told me a good way to prevent header leaks is to cut the plate between the tubes, so that each tube is bolted individually. he uses those thick felpro gaskets and doesn't have a problem with leaks.

Re: Hedman Headers leak like crazy!!!!! [Re: vdriver] #112286 08/30/08 04:25 AM 08/30/08 04:25 AM
Joined: Jan 2003 Posts: 8,180 Detroit, MI CokeBottleKid master
CokeBottleKid master Joined: Jan 2003 Posts: 8,180 Detroit, MI	Quote: Quote: pretty sure there are no air injection ports... i didnt see anything unusual when i was painting the heads.. are they located just below the exhaust ports?... If your heads have these holes, and they ain't plugged, you're wasting your time with different gaskets/headers/whatever. You gotta plug 'em.: check... NOW!

Re: Hedman Headers leak like crazy!!!!! [Re: nutso suave] #112287 08/30/08 06:52 AM 08/30/08 06:52 AM
Joined: Jul 2004 Posts: 3,804 Arlington, Texas B bobby66 master
bobby66 master B Joined: Jul 2004 Posts: 3,804 Arlington, Texas	Quote: an old hot rodder told me a good way to prevent header leaks is to cut the plate between the tubes, so that each tube is bolted individually. he uses those thick felpro gaskets and doesn't have a problem with leaks. This is good advice right here. And make sure the headers aren't hitting a head bolt on the bottom of the flange.

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