Skip to main content 

Important Notes on Cummins plus-minus bolt torque values - amp page

See below for Cummins torque values

Inter Club Navigation

 Home Page   Membership   Contact Us      Club Matters   Engine List   Technical  Videos 

Click for: Cummins engine specs   Click for: CAT Diesel engine Specs   Click for: Detroit Diesel specs   Click for: ADE diesel engine specs-   Click for: Deutz diesel engine specs

Click to
Sign up
for full Membership
Become a Member
and have access to all the manuals and specs at Barrington Diesel Club

Cummins plus-minus bolt torques - amp

Click for:
Other Diesel Engine
manuals and specs

Care with Plus-Minus (+-) torque values


Cautionary Note - Cummins plus-minus torque values does not mean approximate!:

The torque procedure for the Cummins N14 connecting rod bolts ends with a +- value of 5 degrees

Essentially, the reason for this is that this value is meant to be tested against a known torque. In the case of this particular bolt the test torque value is 205 lb.ft, 275 Nm.

If the torque of 205 lb.ft (275 Nm) is achieved within 5 degrees of the 60 degrees angle asked for then everything is fine. If you exceed that window, then it means that the bolt has stretched and you must replace it or face a possible connecting rod failure, even a hole in the block!

For this application Cummins has designed a special socket, Part Number 3824520, exactly for this purpose. Current US retail price about $85.

Cummins N14 
torque angle gauge socket 
Part Number 3824520 

Some of the later manuals have many of these +- degree values, and they must be taken seriously.

Perhaps when faced with a series of such torques, use a torque wrench to pull your degrees and note every torque value for every degree setting, then you can establish a base average.

Bolts that reach their degree setting at less than 5% of that base average are suspect and should be replaced, especially for the like of connecting rod bolts.

 Membership - Sign Up  More about Membership  Login 
Home Page 
  Home - Desktop    Home - Mobile 
Engine List 
  Engine List - Desktop    Engine List - Mobile 
Club Matters
More About Us  Terms and Conditions  Acknowledgements  Site Map  Privacy Policy 

Page Revision #5.2RsC AMP 06-19