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FE Power Forums => FE Technical Forum => Topic started by: Yellow Truck on April 12, 2020, 03:21:27 PM

Title: Torque values for the T&D adjusting screw lock nut?
Post by: Yellow Truck 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?

Title: Re: Torque values for the T&D adjusting screw lock nut?
Post by: blykins 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.

Title: Re: Torque values for the T&D adjusting screw lock nut?
Post by: Barry_R 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.

Title: Re: Torque values for the T&D adjusting screw lock nut?
Post by: blykins on April 13, 2020, 07:03:35 AM

Yep, a good ole wrench and some hand pressure is all that's needed. 

Title: Re: Torque values for the T&D adjusting screw lock nut?
Post by: Yellow Truck 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.

Title: Re: Torque values for the T&D adjusting screw lock nut?
Post by: Posi67 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.