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Old 06-17-2020, 04:20 AM   #7
alex87f
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Join Date: Aug 2017
Drives: Focus ST mk4
Location: France
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Quote:
Originally Posted by Yoshoobaroo View Post
One of the flanges is bent.
Take both parts off, measure which one is bent and have it straigthened/ground flat by an exhaust shop.
Will check that out. Thanks.

Quote:
Originally Posted by NoHaveMSG View Post
These will seal even on a bent or warped flange.

https://catalog.remflex.com/
Seems like a good idea on paper.. but $20 + $110 shipping to France is a bit absurd and I couldn't find other resellers. I can get a stainless resonated midpipe for not much more

Quote:
Originally Posted by 86TOYO2k17 View Post
Could try doubling up on the gaskets. Torque it to spec not just “super tight”

If it’s not making a weird noise you’re trying to resolve, then a small leak at the midpipe to muffler isn’t that big a deal far enough back in the system shouldn’t matter too much, unless it’s making weird noises.

Worst comes to worse Ebay has used ones shipped for 200$ or less

Exhaust shop should be able to fix it though either grinding it down flat, maybe welding on a new flange.

Could try To cut off both flanges and weld on a vband or a slip joint

Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker Could fix it,
But DO NOT apply it to the outside of the flanges it goes directly on where the gasket and flange mate acting as a new second gasket, but fills in uneven surfaces. Typically with gasket
Maker you apply it, hand tighten the bolts wait about 45mins and then torque to spec. Most people torque right away and squeeze out the gasket maker.
Thanks - I'll try separating the flanges, checking for flatness, sandpapering them as flat as I can in case there's debris left, and using leftover JBWeld paste on the gasket, and not outside like I first did.

If the flange on the midpipe is dead, I'll probably replace the whole thing.
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