Need torque specs for rocker housing. 2007 peterbilt c15. I need overhead sequence

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Customer: Need torque specs for rocker housing
JA: What's the make/model/year of your truck? Engine type?
Customer: 2007 peterbilt c15
JA: Are you fixing your truck yourself? What have you tried so far?
Customer: yes
JA: Anything else you want the Truck Mechanic to know before I connect you?
Customer: i need overhead sequence
Answered by wtolkson in 29 mins 2 years ago
Auto Mechanic

34,684 satisfied customers

Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs

Hi, I'm Wayne.

I'll be assisting you with this issue today.

Thank you for coming to Just Answer

Your Question is as important to us as it is to you.

I am sorry to hear you are having this issue.

I go offline between 3-4 Pm CST. M-F

Weekend 2-3 pm CST

Injector hold-down bolt: 37-foot pounds.

Rocker arm and Jake bolts and nuts:80 foot-pounds.

Inlet valves ... 0.38 ± 0.08 mm (0.015 ± 0.003 inch)
Exhaust valves ... 0.76 ± 0.08 mm (0.030 ± 0.003 inch)

Torque for the adjustment nuts ... 30 ± 7 N·m (22 ± 5 lb-ft)

(3) Rocker shaft

The diameter of a new rocker shaft ... 40.000 ± 0.010 mm (1.5748 ± 0.0004 inch)
Bore in the rocker arm for rocker shaft ... 40.065 ± 0.015 mm (1.5774 ± 0.0006 inch)
Maximum dimension for the bore of the rocker arm for the rocker arm shaft ... 40.193 mm (1.5824 inches)
Note: For engines that are equipped with variable valve actuators, refer to Specifications, "Variable valve Actuator" for information on the installation of the rocker arm assembly.

Two different studs are available for the variable valve actuator in the above-listed machines and engines. Both studs should follow the solution that is identified below.

When(###) ###-####Studs are installed or when(###) ###-####Studs are installed to ensure that the studs are tightened to 50 N·m (37 lb-ft). Tighten the studs to an additional 45°.

Note: For engines that are equipped with CAT Compression Brakes, refer to Specifications, "CAT Compression Brake" for the correct procedure on the installation of the rocker arm assembly.

(5) Location for checking the valve lash

Inlet valves ... 0.38 ± 0.08 mm (0.015 ± 0.003 inch)
Exhaust valves ... 0.76 ± 0.08 mm (0.030 ± 0.003 inch)
Note: Refer to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust" for the correct procedure on setting the engine valve lash.

To adjust the unit injectors on cylinders 3, 5, and 6 use the following procedure:

Put the No. 1 piston at the top center position on the compression stroke. Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".

Injector height gauge (4) is used to obtain a dimension of 78.0 ± 0.2 mm (3.07 ± 0.01 inch). The dimension is measured from the top of the unit injector to the machined ledge of the fuel injector body.

Turn unit injector adjustment screw (2) clockwise until the correct height is obtained.

Hold the adjustment screw in this position and tighten locknut (3) to a torque of 100 ± 10 N·m (74 ± 7 lb-ft).

To adjust the unit injectors on cylinders 1, 2, and 4, remove the timing bolt. Turn the flywheel by 360 degrees in the direction of engine rotation. The direction of engine rotation is counterclockwise, as the engine is viewed from the flywheel end. This will put the number 1 piston at the top center position on the exhaust stroke.

Repeat Steps 3 through 4.

Remove the timing bolt from the flywheel after all the unit injector adjustments have been made. Reinstall the valve mechanism cover.

tighten the studs at Locations (3), (4), and (5) to a torque of 50 ± 5 N·m (37 ± 4 lb-ft). Tighten the studs for an additional 45 ± 5 degrees. Tighten the stud at Location (2) to a torque of 65 ± 10 N·m (48 ± 7 lb-ft). Refer to Specifications for more information.

Install variable valve actuator (5).

Install bolt (3). Install nuts (4).

Injector hold-down bolt: 37 foot-pounds.

Rocker arm and Jake bolts and nuts:80 foot-pounds.

I hope this helps you.



If you have any follow up questions, please let me know using the reply button. If you are satisfied with my help, please let me know so we can complete your question.


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