Turbo questions

[Dixon77]

I learned a new fun fact today:
A turbo will stay on the manifold with just one mounting bolt.

My M109 has been my work/daily for the past week or so and while I knew the turbo manifold mount gasket was bad, I hadn't thought to look deeper till I went to put the gasket on this weekend.
I reached in to see what I was dealing with and the outside 2 bolts are broken off, the front rear is missing or sheared flush, and the back rear is keeping the ship afloat.
What is the mounting hardware for the turbo? Is it a nut/bolt in the outside and a set of studs on the inside? If they are studs, what size?
Fun fun fun

 

[gimpyrobb]

If memory serves, bolts outside the manifold and studs close to the block.

 

[kenn]

I learned a new fun fact today:
A turbo will stay on the manifold with just one mounting bolt.

My M109 has been my work/daily for the past week or so and while I knew the turbo manifold mount gasket was bad, I hadn't thought to look deeper till I went to put the gasket on this weekend.
I reached in to see what I was dealing with and the outside 2 bolts are broken off, the front rear is missing or sheared flush, and the back rear is keeping the ship afloat.
What is the mounting hardware for the turbo? Is it a nut/bolt in the outside and a set of studs on the inside? If they are studs, what size?
Fun fun fun

Bolts on the outside and studs on the inside. I just went through this.

Exhaust Manifold to Turbocharger - broken stud

It appears I have a broken bolt stud on one of the four bolts that hold the turbo to the exhaust manifold. After searching through the TMs and finding all sorts of variations, I think I have narrowed it down. It appears I'm going to have to remove the exhaust manifold and then remove the...

www.steelsoldiers.com

 

[Dixon77]

Bolts on the outside and studs on the inside. I just went through this.

Exhaust Manifold to Turbocharger - broken stud

It appears I have a broken bolt stud on one of the four bolts that hold the turbo to the exhaust manifold. After searching through the TMs and finding all sorts of variations, I think I have narrowed it down. It appears I'm going to have to remove the exhaust manifold and then remove the...

www.steelsoldiers.com

Thanks, that helps!
Did you use any RTV on the gasket or throw it in dry?

 

[ToddJK]

Thanks, that helps!
Did you use any RTV on the gasket or throw it in dry?

Dry. There's a lot of heat right there, I'm not sure if there's any RTV that would even hold up, since the intake and exhaust is flowing through the turbo.

 

[kenn]

Well... I haven't done mine yet as I have only one broken fastener and the only leak I can tell is if I've been idling and it loads up unburned fuel in the exhaust. I've been working on safety and reliability issues first and foremost so this one has been put on the back burner with so many other projects, lol. I ended up ordered these STUDS as they were the only grade 8 that I could find that were close enough to the original that I don't thin it will be an issue. If you find the original ones in stock, please post up where! I haven't checked the bolt size yet and I assume it will be non-standard as well. If I had to guess, it will be a 3/8-16 x 1.75" with threads about 2/3 the shaft. If I have some time today, I'll search the TMs and find the part numbers and try to figure it out.

Hillco Fastener Warehouse

Nuts, Bolts and More! Since 1976

www.hillcofasteners.com

 

[gimpyrobb]

I've swapped a few turbos and I've never used rtv, You will need something rated to 1500* if you do!