How Does This Catalytic Converter 'Honeycomb' Look?

SSTJ

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How does this look? Supposed to look any different? First time I've seen one.

Screenshot 2023-03-25 at 6.13.41 PM.jpg

Screenshot 2023-03-25 at 6.13.49 PM.jpg

Screenshot 2023-03-25 at 6.14.00 PM.jpg
 
Most used ones are dark grey to almost black that I've looked at swapping out exhaust.

I wonder why this one fared so well.

Spending most of its time on the street, I'm not too surprised that the structure is in good shape, and that it hasn't been jostled to the point of breaking down. But the color and cleanness sure surprises me.
 
I wonder why this one fared so well.

Spending most of its time on the street, I'm not too surprised that the structure is in good shape, and that it hasn't been jostled to the point of breaking down. But the color and cleanness sure surprises me.

We don't know that it is not running too hot and burning itself clean, do we? ;)
 
We don't know that it is not running too hot and burning itself clean, do we? ;)

As you know, I'm light years behind you in understanding such things. So is that actually a possibility I should look into?

If so, I'm eager to hear what might make it run hot. I'm putting the new one in today so am still focused on this.
 
As you know, I'm light years behind you in understanding such things. So is that actually a possibility I should look into?

If so, I'm eager to hear what might make it run hot. I'm putting the new one in today so am still focused on this.

I ain't that smart.
 
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Well, the cat itself will run extemely hot and become a melted mess if the engine is running rich and dumping fuel into the cats that burns.

That resembles a sparkplug that's running lean, but I don't know if that holds true for cat coloration.

And yeah, they look like new.
 
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As you know, I'm light years behind you in understanding such things. So is that actually a possibility I should look into?

If so, I'm eager to hear what might make it run hot. I'm putting the new one in today so am still focused on this.
An exhaust leak (before the o2)can trick the o2's into running the motor rich. Which superheats the exhaust. 2.5ls like to crack the exhaust manifold. If its between the block and manifold it is hard to see.

Checking fuel trims can tell you what the pcm is trying to do to your motor
 
An exhaust leak (before the o2)can trick the o2's into running the motor rich. Which superheats the exhaust. 2.5ls like to crack the exhaust manifold. If its between the block and manifold it is hard to see.

Checking fuel trims can tell you what the pcm is trying to do to your motor

Interesting. I recently replaced the manifold, so I’m pretty sure I don’t have a leak in that area.

But that’s OK, I suppose this whole thought process is based on Mr Blaine’s half-joking comment that maybe a hot catalytic converter burns itself clean. From what at JKP said, it sounds like more likely an excessively hot catalytic converter would damage itself.

But just out of curiosity, what do you mean by checking fuel trims? Is this an OBDII thing? I have actually wondered if my fuel might be running rich.