Exhaust manifold bolts broken

[Rocket Man]

I would drill out and retap to install new studs.
Next time, instead of risking a broken stud, do this. Using a small wire brush and pick tool to remove any rust from the nut/bolt joint. Then apply some Aerokroil and let it soak in overnight if possible but at least for a few hours. Then using a wrench or socket alternately try loosening and tightening and you’ll start to get some movement in the treads. Spray more Aerokroil then you should have a good chance of removing the nut or the entire stud.

The bolt heads break off these engines and fall off without even trying to remove the bolts. Thus the broken studs being there. GM used crappy hardware. I definitely used ARP when replacing mine. The clamps work fine if you don’t want to pay someone to remove the broken studs or can’t get them out yourself.

 

[muncie21]

My 2014 Denali 6.2 already has 2 broken exhaust manifold bolts.

I'm waiting until it gets warmer and then get in there and replace all of the bolts with either new bolts or possible studs. My biggest concern is being able to remove the existing bolts without breaking off the heads.

 

[Rocket Man]

My 2014 Denali 6.2 already has 2 broken exhaust manifold bolts.

I'm waiting until it gets warmer and then get in there and replace all of the bolts with either new bolts or possible studs. My biggest concern is being able to remove the existing bolts without breaking off the heads.

When I did my 02, all the bolts that still had heads on them came right out. I would think GM was using better quality bolts these days but guess not.

 

[gat0r]

^ LOL
they always use the cheapest option to squeeze out that profit

 

[Sam Harris]

You're going to need to replace the manifolds with longtubes. And the ARP bolts as well. It's unfortunate, but a necessary upgrade. After all, you have an "exhaust leak" and that's dangerous!

Ahh the sweet sound of ARH longtubes... (@Rocketman, thank you for your guidance)

 

[Rocket Man]

You're going to need to replace the manifolds with longtubes. And the ARP bolts as well. It's unfortunate, but a necessary upgrade. After all, you have an "exhaust leak" and that's dangerous!

Ahh the sweet sound of ARH longtubes... (@Rocketman, thank you for your guidance)

Hell yes Sam that does sound sweet! And you’re welcome, glad to help you spend money!

 

[Rashod]

I'm dreading this job! Perhaps I'll just pay someone to do it..

 

[J Mac]

Not saying it's the right way but my Yukon has 3 broken exhaust manifold bolts and I have the cheater brackets on and have had no leaks. And that's with long tube headers. Money was the holdup on me getting the broken bolts removed but since nothing is leaking, I'm gonna leave it like it is until something fails.

 

[Rocket Man]

Not saying it's the right way but my Yukon has 3 broken exhaust manifold bolts and I have the cheater brackets on and have had no leaks. And that's with long tube headers. Money was the holdup on me getting the broken bolts removed but since nothing is leaking, I'm gonna leave it like it is until something fails.

Nothing wrong with that.