Author Topic: Camshaft Bolt  (Read 339 times)

0 Members and 1 Guest are viewing this topic.

petew

  • Newbie
  • *
  • Posts: 22
    • View Profile
Camshaft Bolt
« on: July 05, 2026, 11:45:38 AM »
Went to put the cam gear on my Comp hydraulic roller cam so I can degree it and found that the thread in the camshaft is 7/16 -20 not the standard 7/16 -14 .
So is there a specific ARP bolt that will work for this or is a grade 8 bolt sufficient ?

frnkeore

  • Hero Member
  • *****
  • Posts: 1312
    • View Profile
Re: Camshaft Bolt
« Reply #1 on: July 05, 2026, 12:23:32 PM »
I doesn't even have to be a grade 8 bolt. A grade 5 will work just fine, especially with the extra clamping force of the 20 pitch thread.
Frank

'60 Ford Starliner
'61 Fairlane 500
Austin Healey Replica with 427 & 8.5 Cert

blykins

  • Hero Member
  • *****
  • Posts: 5329
    • View Profile
    • Lykins Motorsports
Re: Camshaft Bolt
« Reply #2 on: July 05, 2026, 01:04:56 PM »
Went to put the cam gear on my Comp hydraulic roller cam so I can degree it and found that the thread in the camshaft is 7/16 -20 not the standard 7/16 -14 .
So is there a specific ARP bolt that will work for this or is a grade 8 bolt sufficient ?

Take a measurement of the length that you need.  Depending on your setup, it may be 1.5" UHL or 1.750".  Will depend on if you have a pump eccentric, thick washer, etc.

Yes, ARP has 7/16-20 bolts in either length.  With a steel core roller cam, I like to torque them at 65-70 lb-ft.
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
Instagram:  brentlykinsmotorsports
YouTube:  Lykins Motorsports