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Old 01-09-2021, 12:42 PM   #1
IDriveFords
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Member#: 518804
Join Date: Sep 2020
Default Grimmspeed up pipe extra thick gasket

Does anyone have any experience using the Grimmspeed extra thick up pipe gaskets? I torqued it to the factory spec of 26 ft/lbs but it just looks like it might still have a slight gap; however, that could just be how it crushed in.

Thanks,

-Rob-
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Old 01-09-2021, 01:30 PM   #2
kopele
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Member#: 363007
Join Date: Jul 2013
Chapter/Region: MWSOC
Location: MO
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2008 STI
Black

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In my experience these gaskets don't compress enough to seal gaps due to misaligned or bent flanges. If the gap is small you should be able to seal it with RTV, which is a good idea to use on exhaust connections anyway.
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Old 01-09-2021, 05:33 PM   #3
K3rm1tth3fr0g
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Join Date: Nov 2019
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2002 WRX Wagon VF39
Midnight Black Pearl

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I've spent SO LONG trying to get my stock headers to seal with my Cobb up pipe with no luck to the point that I had to replace the headers. How well it mates up can also depend on if your up pipe has a flex section or not. Flex up pipes leak much less often at the manifold because they can move when torquing to completely seal up, unlike solid up pipes.

If you haven't already, try loosening everything and tightening the 2 bolt joints first (up pipe-manifold, and manifold-crosspipe). If you can't get the flanges to perfectly mate when everything is completely loose, that means your flanges aren't true and flat or you have something misaligned.

Grimmspeed 2x thick gaskets CAN fix issues with leaks like this sometimes, but it didn't work for my issue that seems very similar to yours, neither did using copper RTV, nor doubling up on gaskets.

Have the flanges trued if you are still having a gap, but 2x gaskets with RTV may be worth a try.

Copper RTV didn't work for me personally but it may for you.

Last edited by K3rm1tth3fr0g; 01-09-2021 at 06:35 PM.
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Old 01-10-2021, 11:11 AM   #4
Max Capacity
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Member#: 149347
Join Date: May 2007
Chapter/Region: NESIC
Location: Tolland, CT
Vehicle:
05 LGT,09 SpecB
Black/silver

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I use red RTV, put bead on both sides of the 2X gasket, let it tack up for 15 minutes then install.
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Old 01-10-2021, 11:14 AM   #5
Bluestreak03
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Location: Southern Oregon
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2001 EJ207 V7 RSTi,
Mica Blue

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Quote:
Originally Posted by Max Capacity View Post
I use red RTV, put bead on both sides of the 2X gasket, let it tack up for 15 minutes then install.
+1 always on hand
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