Does anyone know the thread size of the three studs that are on the outlet side of the exhaust manifold?
I've shopped around at local stores and on line and couldn't find them. ACDelco doesn't have them either.
Can I use small pieces of threaded rod as replacement? What is the heat treatment rating of these studs?
Thanks.

 

About the only place I could find them was the GM dealer.

 

GM p/n 10160364. 10X1.5X9.5
https://chevrolet.7zap.com/en/hhr/50...929405-0-0/#13

 

I could not find any generics. Then I couldn't find a stud installation tool (which is needed, it is tight), so I ended up getting some bolts from the metric bin at NAPA, matched by eye.

 

Thank You. My son is off to the dealer.

 

Thank You. We are gonna try the dealer first and if they don't have it or it takes too long we'll try 7zap.

 

7zap is a dealer. I think the point was it has the part number and the specs you asked for.

 

Yes. 7zap for reference, so you'd know I wasn't just making it up or going from memory.

 

My son has it coming tomorrow. Only $55.00 for three studs and three nuts.!~!!!!!!!

 

your front seat bolts work great also if there strong enough to hold your seat in place they work great to hold the down tube ,,,,, iv done it with now probs