Exhaust Manifold Gaskets - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**JMac11** · 07-15-2020, 09:54 AM

Suggestions on exhaust manifold gaskets, picked up a small leak on start up

LS short box · 07-15-2020, 04:38 PM

I've used both the "stock" all metal type and the Fel-Pro type. Both have worked well.

**AussieinNC** · 07-15-2020, 05:48 PM

Check the exhaust studs and nuts...

These have a bad issue with broken studs causing leaks....

jjzepplin · 07-15-2020, 05:57 PM

Are the multi layer stock type better for headers or the other squishy style?

lutronjim · 07-15-2020, 09:33 PM

My LS in my 70 burned out header exhaust gaskets in a little over a year. I replaced with a 'good' brand and they leaked.

I then replaced with Percy's High Performance Percy Seal-4-Good. 'Problem' with these - instructions say to tork 3 times. Over 3 years later still no leaks. Lit say they are reusable - don't know about this.

jjzepplin · 07-15-2020, 09:49 PM

I was gonna mention those but I have not run them on an LS. I have had them on both my trucks with headers as well as the collectors and have been amazed at how long Percy's last with no leaks. BTW, you read the instructions?

**bigmoe** · 07-16-2020, 10:10 AM

Remflex header gaskets have pretty good reviews. I have a set but haven't installed them yet.

07-15-2020, 09:54 AM	#1
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Exhaust Manifold Gaskets Suggestions on exhaust manifold gaskets, picked up a small leak on start up

07-15-2020, 04:38 PM	#2
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,922	Re: Exhaust Manifold Gaskets I've used both the "stock" all metal type and the Fel-Pro type. Both have worked well.

07-15-2020, 05:48 PM	#3
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,155	Re: Exhaust Manifold Gaskets Check the exhaust studs and nuts... These have a bad issue with broken studs causing leaks.... __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox

07-15-2020, 05:57 PM	#4
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,545	Re: Exhaust Manifold Gaskets Are the multi layer stock type better for headers or the other squishy style? __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350

07-15-2020, 09:33 PM	#5
lutronjim Registered User Join Date: Dec 2013 Location: Dunwoody,Ga Posts: 443	Re: Exhaust Manifold Gaskets My LS in my 70 burned out header exhaust gaskets in a little over a year. I replaced with a 'good' brand and they leaked. I then replaced with Percy's High Performance Percy Seal-4-Good. 'Problem' with these - instructions say to tork 3 times. Over 3 years later still no leaks. Lit say they are reusable - don't know about this.

07-15-2020, 09:49 PM	#6
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,545	Re: Exhaust Manifold Gaskets I was gonna mention those but I have not run them on an LS. I have had them on both my trucks with headers as well as the collectors and have been amazed at how long Percy's last with no leaks. BTW, you read the instructions? __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350

07-16-2020, 10:10 AM	#7
bigmoe Senior Member Join Date: Oct 2014 Location: Brandon, Manitoba, Canada Posts: 952	Re: Exhaust Manifold Gaskets Remflex header gaskets have pretty good reviews. I have a set but haven't installed them yet.



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