Flange gaskets - use them, or RTV?

[a_d_a_m]

Did the SW longtube headers last year. The pal helping me with the job was pretty insistent that he's always just used form-a-gasket or RTV instead of actual gaskets on the flange by the H-pipe. I begrudgingly went along with him; now I've got a small leak there. SOOOOOOOOOOOO I bought some gaskets that I'll have to install, which is what I wanted in the first place.

Just wondering if anyone else has ever gotten away with the copper RTV only in this area? Looking back, it seems real stupid...

[03Merc]

Use factory gaskets. Nothing else...


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[justbob]

I have learned over the years that the H pipe gasket is identical to a grand marquis even though at most stores their computer says differently. Also most times not stocked and like $9.00 instead of $4.00 like the Marquis..?

Anyways, I’ve used the Marquis one at Advance at least twice over the years and never had a fitment or quality issue.


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[blazen71]

I just use 2-bolt, 2.5" gaskets from Amazon. I've reused them too and no leaks. But OEM is prob the best.

[offroadkarter]

I have learned over the years that the H pipe gasket is identical to a grand marquis even though at most stores their computer says differently. Also most times not stocked and like $9.00 instead of $4.00 like the Marquis..?

Anyways, I’ve used the Marquis one at Advance at least twice over the years and never had a fitment or quality issue.


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Yep, this was actually something Comin in Hot taught me like a decade ago when we put secondary cat delete pipes on my red car.

Adam your first mistake was taking tech advice from modern day CVN lol

[crownvic97]

I just use 2-bolt, 2.5" gaskets from Amazon. I've reused them too and no leaks. But OEM is prob the best.
This is what I did as well. No leaks.

[a_d_a_m]

Adam your first mistake was taking tech advice from modern day CVN lol The guy wasn't a CVN guy.

[a_d_a_m]

Okay, so they showed up. What's the common wisdom on install? Use a thin bead of RTV to help them stay in place while mounting, or just mount 'em dry?

[justbob]

Dry dock it homie.[emoji16]


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[Mr. Man]

Dry dock it homie.[emoji16]


Sent from my iPhone using Tapatalk ProSadist .......

[justbob]

Sadist .......

sa·dist
/ˈsādist/
Learn to pronounce
noun
noun: sadist; plural noun: sadists
a person who derives pleasure, especially sexual gratification, from inflicting pain or humiliation on others.
"he was dubbed a dangerous sexual sadist by the judge at his trial"

Not much into pain, mostly, well depends really. And the older I get I prefer to be overpowered, humiliated, and dominated. [emoji6]


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[Mr. Man]

sa·dist
/ˈsādist/
Learn to pronounce
noun
noun: sadist; plural noun: sadists
a person who derives pleasure, especially sexual gratification, from inflicting pain or humiliation on others.
"he was dubbed a dangerous sexual sadist by the judge at his trial"

Not much into pain, mostly, well depends really. And the older I get I prefer to be overpowered, humiliated, and dominated. [emoji6]


Sent from my iPhone using Tapatalk ProTo funny :rofl:

[massacre]

Adam your first mistake was taking tech advice from modern day CVN lol

i LOL’d ............