Code P2431, Secondary Air Pump Check valve, gasket replacement?

Tiny
MTH2ND
  • MEMBER
  • 2006 CADILLAC DTS
  • 4.6L
  • V8
  • TURBO
  • 2WD
  • AUTOMATIC
  • 114,000 MILES
Link below has excellent pics and helpful related discussions, but did not answer some questions:

https://www.cadillacforums.com/threads/p2431-secondary-air.1101200/#post-17860236

My question is regarding Replacement of a Secondary Air System Check Valve and Gasket

Part: GM #12619111 AC/Delco #214-2301 Secondary AIR System Check Valve
AC/Delco 219-600 Secondary Air Injection Pump Check Valve Gasket

After removal of gasket - Factory Manual "Clean the AIR to exhaust manifold gasket sealing surfaces"
How should it be cleaned? Wire brush?

Should the old gasket be used or a new one?
(In post above, old gasket reused.)


Exhaust seal epoxy:
When seating the gasket - "thin bead of exhaust seal epoxy on the gasket"

Should some type of exhaust seal epoxy be used?

If yes, what type should be used?

GM Sealant from Cadillac dealer parts?

Over the counter, there are so many brands and types.

While researching on the internet I ran across a YouTube video specifying that it important to use the right type suggesting damage if wrong type used.

Should the gasket be re-seated with a "thin bead of exhaust seal epoxy on the gasket"?

Any other suggestions are also welcome.

Thanks in Advance!
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Saturday, October 29th, 2022 AT 5:54 PM

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Tiny
KEN L
  • ADMIN
P2431 - Secondary Air Injection System Air Flow/Pressure Sensor Circuit. So, in the repair instructions it does not say anything about the sealer, but I would say use the GM brand it tends to be better, here are the instructions on how to replace the valve in the images below. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.
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Sunday, October 30th, 2022 AT 4:00 PM

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