both catalytic converts has a small hole about the size of a US quarter wondering what i can use to patch the hole

Those cat's run extremely hot so you're going to be able to patch them like you could do for a muffler. With holes in your cat's I'm surprised there isn't a check engine light on. Is there? You could try something like FiberFix 38501 Heat Wrap. If the holes you are seeing are just in the heat shields, don't worry about them. These heat shields often tend to rust out. If you are blowing exhaust out of your cat's, they're shot and should be replaced. The heat wrap to repair an exhaust leak is only temporary.

smoke is not coming out of the catalytic converter,i was looking online and some people are adding holes in the converter -is it possible that the nissan pathfinder catalytic converter was built with a little hole?

smoke is not coming out of the catalytic converter,i was looking online and some people are adding holes in the converter -is it possible that the nissan pathfinder catalytic converter was built with a little hole?

Welding would be the correct choice, although many places apparently don't like to weld them. And the holes may be a sign of things to come, that the entire shell is rusting out and failing. Pics?

Let's see a pic - Could simply be a factory hole in the heat shield. A pic would help.

thanks i will get a pic for you guys

If they are indeed rusted or damaged, I may be able to help with replacements.

here are the pictures

https://drive.google.com/drive/folders/ ... sp=sharing

I know on some factory cats there is an outer shell with thin insulation between it and the inner shell which is what actually contains the exhaust. I don't know Nissans well enough to know if they use this design. But it kind of looks like it. Can you stick something up there and does it seem to go into the cat, or does it stop against something hard, quickly? Or rather does it feel like it's hitting an inner shell as the cat brick is hard in and of itself. Could the smoke you noted be water vapor? The thin insulation I've seen does seem to be able to absorb water, and if so it could be the water evaporating off.

However if it is the actual shell of the cat I think you're looking at new cats very soon, rust is visible in a number of places and it appears it won't be long before it's really bad.

The pics you shared speak volumes. The rusted out holes are through the lower heat shields of your resonators, not your cat's. Your cat's are further upstream, bolted onto your exhaust manifolds, and are oriented in a more vertical position. The rest of your exhaust system (pipes, muffler, and resonators) is laid out horizontal like the resonators you show in the pics. These rusted out holes are common in these heat shields and not too much to worry about unless they get loose due to additional rusting. These aren't even the worst I've seen. What is the year of this Pathfinder?

its a 2010 SE model

I'm not positive I agree 100% with mdmellott. I think those are the secondary cats, not resonators, but I could be wrong.... Here's an example:

https://parts.crestnissan.com/v-2010-ni ... t-manifold See Part # 8 (converter pipe).

I agree that I wouldn't worry about the holes in the heat shields - just drive it.

AZhitman is correct. The layout on the 2010 Pathfinder is very different compared to my 2002. The pics shown with the rusted holes in the heat shields are indeed the cat's not your resonators as I previously thought. Nevertheless, no big deal to worry about the holes in the heat shields.

Thank you all for your help