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Rudolph Diesel
Rudolph Diesel, ASE ,Master Heavy Truck Technichian
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what are the valve lash settings for a big cam 400 cummins

Customer Question

what are the valve lash settings for a big cam 400 cummins intake exhaust injectors
Submitted: 7 years ago.
Category: Heavy Equipment
Expert:  Rudolph Diesel replied 7 years ago.


Welcome to JA!

Here is the settings needed

This will be cold or 4 hours after running.

You adjust valves & inj on same cyl.The mark A is 1-6, B is 2-5, & C is 3-4.Valves are Int 0.014 & Exhaust is 0.027.The injector you tighten screw until injector plunger bottoms out to 105 in lbs.Adjust the injector first,then the valves.Jake brake setting is 0.018 if it has them

Let me know if i can help more!


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