Jump to content

Z22 head bolts


Recommended Posts

  • Replies 11
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Who cares? Extra clamping force on a head gasket. Done deal.


You also significantly reduce the risk of stripping the threads on the aluminum head. 

Stripping threads in aluminum? The block is iron.


In all my years of building Datsun racing engines, I used ARP studs about 5 times. They are completely unnecessary. If you want to spend the money, fine, but I'd rather spend the money in other areas that actually need attention.


What's the saying? A solution looking for a problem.

Link to comment

...if you follow the sequence and torque specs, no extra clamping force necessary.

Who doesn’t follow the torque specs and tightening pattern on head bolts? You’d be an idiot not to.


There are numerous advantages of head studs over bolts. Look it up. Since the stud is not being moved rotationally as it’s tightened, all the clamping force is exerted in the axial direction as the nut is tightened.


With head bolts, there is rotational friction in the block as the torque gets higher and you end up with less clamping force at the same torque spec.


Uniform consistent clamping load across the head gasket. Less chance to fuck it up. Sounds horrible.

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.