Exhaust nuts & bolts Question

[Bish]

Anybody know the size nuts used on the exhaust Y-pipe? 3 for each exhaust manifold and 2 to the cat-back? I'm replacing the Y-pipe in my Tahoe this weekend and I wanted to grab some new hardware and hope the exhaust manifold studs hold up. I'll crawl under there if I have to but I was hoping somebody knew off-hand.

 

One of my cats finally rusted out inside (177K) and buzzes like crazy. Still works fine though as I'm not getting a code.

 

Thanks in advance.

[asilverblazer]

I am pretty sure the bolts to the Cat-back are metric. But if they are like mine they will probably break off, have to be cut out, then replaced with what ever you want.

[Wingnut]

Can I replace it with a monkey?

 

I thought not.

 

Can't be replaced with "anything" then can it, Mr. Smartypants?

[Corky356]

Can I replace it with a monkey?

 

I thought not.

 

Can't be replaced with "anything" then can it, Mr. Smartypants?

 

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Not even a wingnut.

[Bish]

As mentioned above, my concern is something breaking. The Y-Pipe has new studs at the back end so I need to find nuts that match. The ones on the exhaust manifold are the ones I am concerned about. I'm more concerned with snapping one of the studs on the exhaust manifild. Hence my interest in having new parts on-hand before starting the work. Seems like I always snap something whenever I DON'T have a spare but if I have spares, nothing goes wrong.

[Mr. Smith]

As mentioned above, my concern is something breaking.  The Y-Pipe has new studs at the back end so I need to find nuts that match.  The ones on the exhaust manifold are the ones I am concerned about.  I'm more concerned with snapping one of the studs on the exhaust manifild.  Hence my interest in having new parts on-hand before starting the work.  Seems like I always snap something whenever I DON'T have a spare but if I have spares, nothing goes wrong.

 

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Put on some kroil or pb blasteer and go from there. Unless you live in the rust belt they ought to come apart with little trouble.

[Bish]

Not worried about getting them off. I was more concerned with not enough thread left for it to go back on snug.

 

In any event.....all 8 nuts are M10 x 1.5. I grabbed some stainless steel ones since the exhaust is stainless. $1.35 each at the dealer versus .70 at Ace Hardware.