×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Cylinder head bolts

Cylinder head bolts

Cylinder head bolts

(OP)
Hi
I'm searching for cylinder head bolts with the following spec:

M12
10.9 grade
1.5mm thread.
shank length of 90mm

The oem can no longer supply! any ideas? I haven't had any luck with any other suppliers.

Also if I were to change over to use studs how should I torque them as the orginals were stetch type and studs are not?

Thanks all.

RE: Cylinder head bolts

I have to agree with Larry that ARP makes extremely good fasteners. I've never seen such high quality in a bolt or stud before.

But, you shouldn't have too much trouble finding a bolt that will work. M12x1.5 is a standard thread, 10.9 isn't an extremely high strength, and 90mm isn't that long for the size. Call brafasco, and other fastener suppliers, you shouldn't hev too much trouble finding them.

Try finding an M11 130mm long in a 13.9!! It wasn't possible, and i ended up with the ARP studs.

RE: Cylinder head bolts

(OP)
Thanks guys,
I've had no joy finding bolts but studs could be the way to go, i'll give the companys you suggest a call on Monday.

Any Ideas on the second question?
What do I torque the studs to? is the torque purly from the fixings point of view I.E TTY on the stretch bolt or from the point of view of the loading on the object that is being fixed?


Cheers
DaveE

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources