Flange trouble between DP and catback. help... - Subaru Enthusiasts Car Club of the Sierras

100_Percent_Juice · 2008-03-17, 09:43 PM

We welded in a new high-flow cat on my exhaust and also my friends exhaust this weekend. I replaced the flange on my dp and catback with a v-band flange kit(works awesome). The flange on my friends is the standard 2 bolt flange. For some reason since we took it off, no matter how much you tighten the bolts, there is air getting out on both sides opposite the bolts.

Should I add another gasket or make a permatex gasket like Dean said and then bolt it down and let dry?

WRXlerate · 2008-04-10, 10:40 AM

I say just hook him up with the v-band too. I bet it works 10 times better than that donut gasket! I don't see the permatex lasting very long before it starts leaking.

100_Percent_Juice · 2008-04-10, 02:23 PM

Yeah the V-band is probably the coolest thing ever. He wasn't willing to spend the $45 for it though so he used the permatex. Perhaps if that fails down the road he will feel the need to spend the money and replace it with the v-band.

cody · 2008-04-14, 02:49 PM

Are you trying to seal flat flange to donut flange?

100_Percent_Juice · 2008-04-14, 05:54 PM

no.

cody · 2008-04-14, 07:50 PM

The flanges are probably warped. Try a new gasket and consider resurfacing the flanges.

100_Percent_Juice · 2008-04-14, 08:29 PM

Yeah, I have no doubt that they are warped. A new gasket was tried to no avail. Its currently sealed with permatex like Dean suggested. So far, so good.

2008-03-17, 09:43 PM	#1
100_Percent_Juice (40 percent vodka) Real Name: Joel Join Date: Oct 2006 Location: Reno, NV Posts: 4,446 Car: 2004WRX Class: Baby-Hauler/GroceryGetter	Flange trouble between DP and catback. help... We welded in a new high-flow cat on my exhaust and also my friends exhaust this weekend. I replaced the flange on my dp and catback with a v-band flange kit(works awesome). The flange on my friends is the standard 2 bolt flange. For some reason since we took it off, no matter how much you tighten the bolts, there is air getting out on both sides opposite the bolts. Should I add another gasket or make a permatex gasket like Dean said and then bolt it down and let dry? __________________ "A power nap is when you sleep on someone who is weaker than you." - Dimitri Martin

2008-04-10, 02:23 PM	#3
100_Percent_Juice (40 percent vodka) Real Name: Joel Join Date: Oct 2006 Location: Reno, NV Posts: 4,446 Car: 2004WRX Class: Baby-Hauler/GroceryGetter	Yeah the V-band is probably the coolest thing ever. He wasn't willing to spend the $45 for it though so he used the permatex. Perhaps if that fails down the road he will feel the need to spend the money and replace it with the v-band. __________________ "A power nap is when you sleep on someone who is weaker than you." - Dimitri Martin

2008-04-14, 02:49 PM	#4
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Are you trying to seal flat flange to donut flange? __________________ Slow and low, that is the tempo.

2008-04-14, 05:54 PM	#5
100_Percent_Juice (40 percent vodka) Real Name: Joel Join Date: Oct 2006 Location: Reno, NV Posts: 4,446 Car: 2004WRX Class: Baby-Hauler/GroceryGetter	no. __________________ "A power nap is when you sleep on someone who is weaker than you." - Dimitri Martin

2008-04-14, 07:50 PM	#6
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	The flanges are probably warped. Try a new gasket and consider resurfacing the flanges. __________________ Slow and low, that is the tempo.

2008-04-10, 10:40 AM	#2
WRXlerate EJ22 Real Name: John B. Join Date: May 2005 Location: Behind a brick wall. Posts: 471 Car: 02 Soccermom Wagon Class: "sleeper" Destroying V8 Egos 4 cylinders at a time	I say just hook him up with the v-band too. I bet it works 10 times better than that donut gasket! I don't see the permatex lasting very long before it starts leaking.

2008-04-14, 08:29 PM	#7
100_Percent_Juice (40 percent vodka) Real Name: Joel Join Date: Oct 2006 Location: Reno, NV Posts: 4,446 Car: 2004WRX Class: Baby-Hauler/GroceryGetter	Yeah, I have no doubt that they are warped. A new gasket was tried to no avail. Its currently sealed with permatex like Dean suggested. So far, so good. __________________ "A power nap is when you sleep on someone who is weaker than you." - Dimitri Martin