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Part numbers for exhaust manifold bolts (6.2 NON-TURBO)

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1.4K views 17 replies 5 participants last post by  OkDually  
#1 ·
Time to re-install the exhaust manifolds. All of my bolts are rusted out and I'd like to replace them with new ones. Looking for the correct part numbers.

(I know some people say to just go to the hardware store but I'd rather not do that if possible since the hardware stores around here aren't that great or they're only open when I'm at work.)

I found an old thread which had them listed but that was for a 6.5. Mine is a 6.2 (with 6.5 heads) NON-TURBO.

What I counted in my parts bags from when I took the exhaust manifolds off:
4 short bolts (~44mm)
7 long bolts (~64mm)
5 studs (~14mm/64mm)

Based on that old post (https://www.dieselplace.com/posts/6721842/) and my measurements of my bolts, I think these might be the part numbers. The arrangement of long/short/stud in that post doesn't match mine either but maybe that's for a turbo?

I believe these are the studs: More Information for GM GENUINE 10137539

And I think these might be the long bolts: 14028922 - M10x1.5x65 Multi-Purpose Bolt GMPartsNow

As for the short bolts, I'm not sure. I think this might be the part number but I don't know why the picture shows some sort of bracket or why it's $12 for a single bolt! Same part is very expensive on other websites as well:


Are those the right part numbers?

Alternatively, are there any good aftermarket (good like ARP) bolts/stud sets available? Could not find any that would work with the 6.2 non-turbo.
 
#2 ·
I just bought black oxide flange style bolts on ebay and put plenty of copper antiseize on them. The exhaust studs with the springs there are 3 on each manifold I ended up buying Dorman ones. The bolts I bought were 2 years ago and I know after a year they came out fine I pulled the manifolds for some reason.
 
#9 ·
They look non-standard with the thick circular washer. Probably custom GM part. The one with the wrench flats is likely from a previous owner who used a hardware store.

I'm guessing these aren't as critical to seal well as the ones that go into the head.

There is a Fastenal but it's not really close to me which is part of why I usually prefer to order by part number. Plus then I know I'm getting the right thing. If I can't find the part though, I'll have to do that.
 
#10 · (Edited)
Found this diagram: EXHAUST SYSTEM-V8

Studs have part numbers 14050426 and 12337861. Neither seems to be available but they're not marked as discontinued either. Most websites just give an error when you put in those numbers.

This looks promising: Dorman Products - 03107.
The Dorman kit comes with a stud, nut and spring. Sold by RockAuto. Thread pattern is M10x1.5-77mm.

Anyone know if that's right?
 
#11 ·
Try this gm # 15677737 for the studs.
 
#12 ·
That's it! And it even has wrench flats now. Excellent.

When I put that number into RockAuto the studs came up (they were out of stock) but so did that Dorman kit I linked to above. If they're the same, I may still order the Dorman kit since it comes with nuts and springs for a fraction of the price. Unless that's a bad idea?
 
#13 ·
Are the old 65mm exhaust studs m10 on both ends?
I mean the studs that hold the manifolds to the heads.
In post #5 the 10137539 studs are 85mm long, used on the 6.5 turbos.
 
#15 ·
10137539 is M10-1.5 x 85mm with a m10-1.5 x 15 stud, m10 on both ends and too long.
10137539 is for the 6.5td.
You need these studs - GM 12554340 or GM 14028924
You will come across a bunch of listings that show photos of pins.
Another case of internet DUH.