Author Topic: Torque values for the T&D adjusting screw lock nut?  (Read 1358 times)

0 Members and 1 Guest are viewing this topic.

Yellow Truck

  • Hero Member
  • *****
  • Posts: 608
    • View Profile
Torque values for the T&D adjusting screw lock nut?
« on: April 12, 2020, 03:21:27 PM »
Going to pull off the rockers to block the oil passages, and I looked at the instructions and I knew there was something sketchy in the instructions. Under "Final Assembly" it reads "Set valve lash to cam manufacturers specs and torque the adjuster crew jam nut to 5/20 ft-lbs".

I find this instruction, specifically 5/20 ft-lbs, to be unclear. What is the correct value?
1969 F100 4WD (It ain't yellow anymore)
445 with BBM heads, Prison Break stroker kit, hydrualic roller cam, T&D rockers, Street Dominator Intake with QFT SS 830.

Paul.

blykins

  • Hero Member
  • *****
  • Posts: 4835
    • View Profile
    • Lykins Motorsports
Re: Torque values for the T&D adjusting screw lock nut?
« Reply #1 on: April 13, 2020, 06:20:44 AM »
I have never used a torque wrench on them,  but the 20 would be for the nut.
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

Barry_R

  • Hero Member
  • *****
  • Posts: 1918
    • View Profile
    • Survival Motorsports
Re: Torque values for the T&D adjusting screw lock nut?
« Reply #2 on: April 13, 2020, 06:37:02 AM »
and 20 would be a "lot".
The jam nut is only to keep the adjusting screw from coming loose, as it applies a load in the wrong direction for assembly strength - pulling it out of the rocker.
Guys the put some extra "oomph" on those can break adjusters and pull threads on rockers.

blykins

  • Hero Member
  • *****
  • Posts: 4835
    • View Profile
    • Lykins Motorsports
Re: Torque values for the T&D adjusting screw lock nut?
« Reply #3 on: April 13, 2020, 07:03:35 AM »
Yep, a good ole wrench and some hand pressure is all that's needed. 
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

Yellow Truck

  • Hero Member
  • *****
  • Posts: 608
    • View Profile
Re: Torque values for the T&D adjusting screw lock nut?
« Reply #4 on: April 13, 2020, 10:41:29 AM »
Thanks. I finally found the email from T&D who said the note means 5 to 20, and that most builders do 18.

In any case, I don't have the years of developing the touch that you guys have, plus the engine is in the truck so it is harder to be consistent, so I'll do 15 lbs.
1969 F100 4WD (It ain't yellow anymore)
445 with BBM heads, Prison Break stroker kit, hydrualic roller cam, T&D rockers, Street Dominator Intake with QFT SS 830.

Paul.

Posi67

  • Sr. Member
  • ****
  • Posts: 296
    • View Profile
Re: Torque values for the T&D adjusting screw lock nut?
« Reply #5 on: April 14, 2020, 12:59:27 AM »
https://www.summitracing.com/int/parts/lsm-tq-100-3

I have one and believe 22 ft/lbs is the preset. Works great.