Flange gasket

[BLOWN9646]

Over torq'd? Possibly installed backwards?

 

[03SonicVert]

I don't think you can over torque that side and wind up with that. The thin metal portion is sandwiched between the manifold and mid pipe flange keeping the compression portion safe.

I don't think backwards install either. My thought would be heat and expansion of that inner ring during WOT or spirited driving.

I wouldn't be too concerned. Was there an issue with an exhaust leak/noise or were you doing some other work and noticed?

SV

 

[BLOWN9646]

I installed it few weeks ago and thought I still heard a slight hiss, so I replaced another again last night (now it's good). I read they can be installed backwards (fat side needs facing towards manifold) and still leak so was just wordering if this is true.

Edit: I believe I originally had the larger side facing the mid pipe

 

[03SonicVert]

I've always thought this gasket was an odd setup. Why they didn't make it symmetrical so there was no backwards or imprint "this side manifold" or something similar. When I swapped my pipe I verified it was on the right way like three times, three times, three times. Also if they are not pushed on square you can get some distortion and leaking.

Just a little OCD.

SV

 

[Top Fuel Friday]

Exactly this, its directional and for whatever reason it's not held in place well by it self. Last time I changed midpipes I kinda held it in place with my hand from the edges when doing the final torque down and had no issues.