T_Vert

I need just 1 stud for a z06 exhaust manifold.

Thanks
dave

vettenuts

My CD only goes to 2001 on that part, but the number for 01 is 12562640. I actually looked at these studs this morning as I plan to re-build my stockers before I store them away. They are not really very good studs and I may look aftermarket for something better.

T_Vert

thanks. d oes that cd have a diagram by chance of how the 01+ oil dispstick mounts to the manifold/block?
Thanks
dave

leaftye

The catalog I'm looking at is from the downloads section in Crossflags.com. The part # there is 14060030. Also, it's a M10X1.5X35....10.9PC if you care about the strength rating. You should be able to get that at any hardware place. Not what I consider a critical bolt, so I don't think it matters that Home Depot bolts are weak.

Not having a good time with your muffler swap are you?

G-lock

Autozone has them. Jeff

Wolfmanjohn

The stud part number on my '04 LS-1 is 12562640 also, so I think you're pretty safe with that. The prevailing torque nut (M10X) part number is 10255857.

When I recently snapped one stud while reinstalling the exhaust mid section after an abs-of-aluminum install, I decided to replace all six studs and nuts because; 1) all six nuts came off hard (my fault for not using anti-seize at that point), and, 2) all six went on even harder (again, my fault for not using anti-seize). Harder than the 15 lb.-ft. of torque called for on those studs, that's for sure!

Bottom line is that one should never reuse prevailing torque nuts or the fasteners they are attached to.

I hate prevailing torque nuts, but I can understand their use in this application at this torque spec. And these are critical parts, too.

Thank goodness for Autozone.

Safe and happy holidays!

T_Vert

heh nah, im going back to stock manifolds and h pipe. Would you have thread pitch for the bolts that hold muffler to the h pipe in that cd by chance??

Dav

leaftye

I thought 1.5 was the thread pitch. If not, I'm going to have to re-read Carroll Smith's Nut's, Bolts, Fasteners & Plumbing book again.

T_Vert

were those M8s too?


Dave

vettenuts

Here is what I have:

For 01 manifold stud: Part# 12562640, M10X1.5X36.4 22THD, M10X1.5X16, 14 THD

For 98-04 cat pipe to exhaust bolt: Part #10460030, M10X1.5X35

5 Liter Eater

The size is 1.50 x 57 mm, M10. I paid $3.17 for 6 stud bolts. Autozone part #329329.

T_Vert

thanks guys, i saw a nut on the stud itself which made it look different then a conventional stud. I'll have to look again

Dave

PHPD7102

Hey Dave your dumping your long tubes? Thought you wanted better 1/4 mile times?

Todd

T_Vert

yep, already sold em. We'll see if you can keep up w/ my stock exhaust car next year

BTW, either the muffler to h pipe thread pitch isnt M10x1.50 or the bolts were mislabeled at ace as they didnt fit correctly. The bellhousing bolts do fit though so whatever size those are is the size of the hpipe to muffler bolts.

Dave

PHPD7102

Oh man thats a direct challenge!! I am not buying sticky tires until I get the 3.90's in with the hardened shaft so maybe just maybe you and your stocker with 4.10's can take me until then....after that though!!

Oh and just because your a better 1/4 mile driver than me isnt going to save you!!

T_Vert

guess we'll have to see. If you beat me it will be on the top end you should with the mods you got though. So off to byron next season to see what u got.


Dave

JOHNNY P.

ericdwong

I too am about to replace my 6 exhaust studs. So you're saying that the torque nut is actually a seperate piece?

Any pointers on getting the studs off the car??? I havent tried too hard yet but they seem like they're really stuck on.

I will go with the autozone bolts, GM wants $4.30ish a PIECE for the bolts! ANd I'll buy a ton of seize!

T_Vert

thanks again johnny, i hope to have the rims and tires for u this coming week. I got the manifolds on last night.

Dave

T_Vert

The studs have a nut that I think is part of the stud that will aid you in getting them out. IF that doesnt work, just double nut them out. The autozone stud is a good 1/2" shorter then the OEM stud but i dont think it'll be too much of a problem. I wont know for sure till i put it all together though.

Dave