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I have a 1997 K2500 3/4 tin pickup truck With a 5.7 L motor…

Customer Question
I have a 1997 K2500...
I have a 1997 K2500 3/4 tin pickup truck With a 5.7 L motor problem I’m having is exhaust flange between the two catalytic converter’s keeps burning out. I’ve tried to triple gasket the flange and it still burns up the gasket. What do you think the problem is?
Submitted: 5 months ago.Category: GMC
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Answered in 2 minutes by:
11/13/2017
GMC Mechanic: George H., ASE MasterTechnician replied 5 months ago
George H.
George H., ASE MasterTechnician
Category: GMC
Satisfied Customers: 19,154
Experience: 15+ Years ASE Master Technician with Level 1 Certification
Verified

Hello I will help,

If you have a helper run the engine at 2500-3000 rpm are the cats getting red and glowing?

Are all the exhaust hangers in place and holding the pipes?

I would expect a restricted cat or an overfueling situation causing excess heat at that point.

Take a look and let me know.

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Customer reply replied 5 months ago
I’m at work right now not able to do this
Customer reply replied 5 months ago
I can’t talk right now at work.
GMC Mechanic: George H., ASE MasterTechnician replied 5 months ago

That is fine, when you get a chance to check if the pipes or cats glow at speed let me know by posting back to this thread, I am here most of the time

Thanks

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