Catalytic Converter

[Mango]

Hi All
I have a 1989 Burb all original parts including the CAT at 203,000 miles runs great (so far). How to check if I should replace the CAT, Leave it alone, or just remove it??
No Emissions in Wyoming Yet!

Thanks

 

[Grit dog]

You answered your own question, I’d say. If it runs like it should then the cat isn’t messing anything up.
Not sure I’d cut apart a 37 year old exhaust unless I was planning on replacing it.

 

[Ricko1966]

You can test them in several ways and you'd need to use 2 to tests 1 for pressure and 1 for temperature. But if you aren't having a problem,let sleeping dogs lie. You can test for vacuum drop,or inlet back pressure,with a vacuum gauge/fuel pressure tester. Check inlet vs. Outlet temps with a non contact thermometer. But again I agree with @Grit dog leave it alone.

 

[dd1990]

Hi All
I have a 1989 Burb all original parts including the CAT at 203,000 miles runs great (so far). How to check if I should replace the CAT, Leave it alone, or just remove it??
No Emissions in Wyoming Yet!

Thanks

Those old pancake style cats were restrictive when new, I definitely felt a horsepower bump when I switched to a modern honeycomb cat.

 

[Mango]

@dd1990
What brand did you use ?

 

[bucket]

Those old pancake style cats were restrictive when new, I definitely felt a horsepower bump when I switched to a modern honeycomb cat.

I agree, the old pellet style converters suck. Putting a newer converter on it will probably lessen you're emissions and it will also give you some more horsetorques.

 

[dd1990]

@dd1990
What brand did you use ?

It was a Magnaflow CARB certified cat. Here link. https://www.magnaflow.com/products/...pliant-direct-fit-catalytic-converter-3391476