The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-16-2010, 12:17 AM   #1
Leviticus
Shake and Bake!
 
Leviticus's Avatar
 
Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
Header Gaskets Round Or Square, what brand have you had luck with

Hey guys,

I have a 1972 C10 with a rebuilt 5.7 350, it has headers on it and I have a leak at the manifold that is driving me nuts, I have new custom duals with Flowmaster 40's and it sounds like a crappy pre-resto beater lol.

My question is does my 350 have square or round exhaust ports, and what type or brand have you had luck with? I tried to search for an answer but there were a ton of answers but none seemed the same.

Does anyone sell Grade 8 header bolts that you know of? I have broken some on my 427, and it was a nightmare. I would prefer to put grade 8's in now.
__________________
"All tyranny needs to gain a foothold is for people of good conscience to remain silent."
Thomas Jefferson

"You are remembered for the rules you break."
General Douglas MacArthur

"Support Our Troops And The NRA"
Leviticus is offline   Reply With Quote
Old 02-16-2010, 01:25 AM   #2
Mudder
Registered User
 
Mudder's Avatar
 
Join Date: Feb 2001
Location: East Central, MO
Posts: 11,336
Re: Header Gaskets Round Or Square, what brand have you had luck with

Long time ago I had the same problems you do. I went with the regular manifold gaskets that have the little hooks on them that sit on the bolts. They are metalic on one side and three to a side. Cost about 8 bucks.. Small block manifold gasket set. Another thing I did to keep the bolts from working loose, that causes leaks. I cut the header flanges on both sides of the center tubes. Makes it a lot easier to start the bolts and your bolts won't work loose. Believe me, it works.
If you look close you will see the cuts in my flanges. I cut the new set before I sent them off to have them coated.
Attached Images
  
Mudder is offline   Reply With Quote
Old 02-16-2010, 04:22 AM   #3
El Jay
Gone to greener pastures
 
Join Date: May 2007
Location: Gateway to the Delta
Posts: 7,354
Re: Header Gaskets Round Or Square, what brand have you had luck with

I had a problem with header bolts backing out a bit which caused a leak & the gaskets would burn out.
I changed to copper gaskets and ARP bolts. Problem pretty much solved.
I still have 1 bolt that wants to back out every once in a while.
__________________
'69 Chevy 1/2 T LWB Stepper: Daily Beater
'72 GMC 3/4 T Fleet: Another Daily Beater
'72 Plymouth Gran Coupe: ?


"Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche

"Never kick a fresh turd on a hot day." Harry S. Truman

GUN CONTROL: Never having to say, "I missed you."

Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck
El Jay is offline   Reply With Quote
Old 02-16-2010, 08:32 AM   #4
bigsnookmaster
Registered User
 
bigsnookmaster's Avatar
 
Join Date: Jan 2008
Location: St.Petersburg,Fl
Posts: 1,267
Re: Header Gaskets Round Or Square, what brand have you had luck with

I would look at the header and see what style gasket you need, the flange should pretty much tell you. I use Mr.Gasket Ultra seal gaskets,they seal well and I have re-used them before. I once had a header bolt back out and had a leak for three weeks, put a bolt back in,tightened it up, and no more leak! Don't ask me why I waited three weeks.LOl. I'm not sure of which brand header bolts I used, but they were about $50. They are stainless with an allen set screw in the center. You snug them down and then tighten the set screw. They worked well for me, bought them at the local speed shop. You have to remember that these are only 3/8" bolts so you don't need to overtighten them. My .02 Good luck
bigsnookmaster is offline   Reply With Quote
Old 02-16-2010, 11:51 AM   #5
BLACK AND BLUE 67-72
Firefighter
 
BLACK AND BLUE 67-72's Avatar
 
Join Date: Feb 2001
Location: Yellville, Ar, USA
Posts: 1,943
Talking Re: Header Gaskets Round Or Square, what brand have you had luck with

I did the same as Mudder and have not had a problem since!!! It's been about 8 years now.
__________________
'72 Chevy SWB 350 Auto
'67 GMC LWB 350 4 speed
'70 Chevy 4x4 Stepside 350 Auto
Yellville, Ar. USA

BLACK AND BLUE 67-72 is offline   Reply With Quote
Old 02-16-2010, 12:02 PM   #6
piecesparts
Parts and more parts
 
piecesparts's Avatar
 
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
Re: Header Gaskets Round Or Square, what brand have you had luck with

I use Felpro header gaskets and over the years I have had great service from using them. Their product has the outer ends with open slots, so hanging them on a bolt is no problem. I usually put in a long bolt on each end to hold the header and the gasket, then as I put in the header bolts and cinch them up, I take out the long bolts and replace them with the ehader bolts.

I use teflon tape on my header bolts and they do NOT back out of the head. They stay where I put them and the teflon does not burn. When it is time to redo the bolts, the tape comes right off and new is put on, again. It is cheap and easy to do and can be purchased at any hardware store.
__________________
Frank
piecesparts is offline   Reply With Quote
Old 02-16-2010, 12:24 PM   #7
leddzepp
Moderator
 
leddzepp's Avatar
 
Join Date: May 2007
Location: Southern Cal
Posts: 20,031
Re: Header Gaskets Round Or Square, what brand have you had luck with

x 2 on the copper gaskets if you have headers.
__________________
1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed.

1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck.


RIP ElJay
RIP 67ChevyRedneck
RIP Grumpy Old Man
RIP FleetsidePaul
leddzepp is offline   Reply With Quote
Old 02-16-2010, 01:35 PM   #8
Camaro_nut2001
Chevy Lover Till The End.
 
Camaro_nut2001's Avatar
 
Join Date: Dec 2009
Location: Mascot TN.
Posts: 795
Re: Header Gaskets Round Or Square, what brand have you had luck with

Quote:
Originally Posted by piecesparts View Post
I use Felpro header gaskets and over the years I have had great service from using them. Their product has the outer ends with open slots, so hanging them on a bolt is no problem. I usually put in a long bolt on each end to hold the header and the gasket, then as I put in the header bolts and cinch them up, I take out the long bolts and replace them with the ehader bolts.

I use teflon tape on my header bolts and they do NOT back out of the head. They stay where I put them and the teflon does not burn. When it is time to redo the bolts, the tape comes right off and new is put on, again. It is cheap and easy to do and can be purchased at any hardware store.
Wow, I use the same brand gasket and use the exact same method on all my motor's, never had a problem. It felt so wierd when I read this, like I wrote it myself, lol.
__________________
1969 Chevy SWB Big Block - Under the knife as of 12/26/2011
1989 Chevy Silverado, 4X4 - Daily Driver
1996 Chevy Suburban K1500 - 4-Wheeler, Campin Truck
1968 Chevrolet Impala Sport Coupe - 327/350hp, TH400, all original.
Members I've met: BamaBaxter,

My Build: http://67-72chevytrucks.com/vboard/s...d.php?t=500359
Camaro_nut2001 is offline   Reply With Quote
Old 02-16-2010, 01:49 PM   #9
Leviticus
Shake and Bake!
 
Leviticus's Avatar
 
Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
Re: Header Gaskets Round Or Square, what brand have you had luck with

Well, I'm officially a Numb Nuts lol, I am getting ready to pull the header, I go for the first bolt and, man that sure was easy to loosen lol. All but one were hand tight, tighten them up and its back to its mean sounding self.

Sorry guys, next time I will turn the wrench before I type my questions. But, you guys are GREAT, Love the forum, and all the help you guys have given me already. So a big THANKS!

And Mudder, I hate you lol, I want my engine compartment to look like yours! Very nice work!
__________________
"All tyranny needs to gain a foothold is for people of good conscience to remain silent."
Thomas Jefferson

"You are remembered for the rules you break."
General Douglas MacArthur

"Support Our Troops And The NRA"
Leviticus is offline   Reply With Quote
Old 02-16-2010, 01:51 PM   #10
Leviticus
Shake and Bake!
 
Leviticus's Avatar
 
Join Date: Feb 2010
Location: Central Coast, CA
Posts: 609
Re: Header Gaskets Round Or Square, what brand have you had luck with

Quote:
Originally Posted by piecesparts View Post
I use Felpro header gaskets and over the years I have had great service from using them. Their product has the outer ends with open slots, so hanging them on a bolt is no problem. I usually put in a long bolt on each end to hold the header and the gasket, then as I put in the header bolts and cinch them up, I take out the long bolts and replace them with the ehader bolts.

I use teflon tape on my header bolts and they do NOT back out of the head. They stay where I put them and the teflon does not burn. When it is time to redo the bolts, the tape comes right off and new is put on, again. It is cheap and easy to do and can be purchased at any hardware store.
Hey,

Great call on the Teflon, I am going to try this. I love old school cheap preventative measures.

Thanks.
__________________
"All tyranny needs to gain a foothold is for people of good conscience to remain silent."
Thomas Jefferson

"You are remembered for the rules you break."
General Douglas MacArthur

"Support Our Troops And The NRA"
Leviticus is offline   Reply With Quote
Old 02-16-2010, 02:56 PM   #11
chas350
Registered User
 
Join Date: Mar 2007
Location: Connecticut
Posts: 581
Re: Header Gaskets Round Or Square, what brand have you had luck with

I have found that header bolts always need retightening with new composite gaskets after 1-2 heat cycles as the gasket compress's when its heated. Although I don't believe it would be necessary with copper gaskets, only composite type.
__________________
"I'll Procrastinate Tomorrow"
quote by LEEVON


71 K10 long fleet (sons truck) new 370hp 355, sm465 np205, 3.73's 33's
70 K20 long fleet
98 G3500 work van
chas350 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 04:19 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com