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We all know in order to get a million miles out of your N14 you need to keep it cool, well lubricated and perform regular maintenance. Let one of these slip and your rig is going to wind up in the shop with you stuck waiting for the repair. This cylinder head was crafted with state-of-the-art tooling and machining to ensure supreme quality. Plus, it’s been pressure and vacuum tested for quality assurance. Take your Cummins N14 back to its glory days! There’s no need to stress about the hassle of installation either, because when you buy your cylinder head from us, the components come ready to install to save you time while also ensuring that specifications are within proper tolerances.
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CYLINDER HEAD FOR CUMMINS N14 | New# 3084981
TECHNICAL DATA
Fits engine models:
Cummins N14
Cummins N14 Engine Specifications:
Year: 1991-2006
Liter: 14.0
CID: 855
Cylinders: L 6
Bore/Stroke: 5.4998-5.5050″, 6.000″
Compression Ratio: 16.3:1
Firing Order: 1-5-3-6-2-4
Comments: N14
Tune-Up Specifications:
Oil Pressure At Idle: 10 Psi at 700 Rpm
Oil Pressure: 35-45 Psi
Intake Valve Lash: .014″ Cold
Exhaust Valve Lash: .027” Cold
Notes: This service parts topic introduces a change in the main cap capscrews and torque values for N14 engines. This change was put into effect to reduce main cap/block fretting.
Depending on engine build date, there are two different procedures. They are as follows:
#1: For engines built up to January 5, 1998 (and prior to engine serial number 11875596), use this procedure that includes use of the grade 8 capscrew, part number 208346.
Note: This procedure remains unchanged.
Note: Use the torque procedure in the N14 Shop Manual, Bulletin 3810487, to tighten the N14 main caps in engines that were made prior to January 5, 1998.
Tighten the main bearing capscrews to the following torque values:
1. Tighten to 122 N•m [90 ft-lb].
2. Tighten to 230 N•m [170 ft-lb].
3. Tighten to 346 N•m [255 ft-lb].
4. Loosen completely.
5. Repeat steps 1 through 3.
#2: For engines built on or after January 5, 1998, beginning with engine serial number first 11875596, use this procedure that includes a new grade 12.9 capscrew, part number 3411337.
1. Tighten to 68 N•m [50 ft-lb].
2. Tighten to 136 N•m [100 ft-lb].
3. Tighten to 190 N•m [140 ft-lb].
4. Rotate main bearing capscrew 90 degrees in the direction of tightening while following these instructions:
– Use a 3/4-inch drive 1-1/8-inch socket that has been etched with two axial lines 90 degrees apart.
– Place the socket over the main cap capscrew head, and mark the cap with a silver pencil at the location of the socket axial line number 1.
Using an impact wrench, rotate the main bearing capscrew in the direction of tightening until the socket axial line number 2 lines up with the mark on the cap (90 degrees).
Casting Number–Type–Comments
3066210 Block 1991
3081210 Block 1994
3064291 Crankshaft
3088516 Head 1994
3078360 Head 19.5° Intake Valves, 44.5° Exhaust Valves, 300 HP Truck
3064292 Rod 91N14, Taper
3078328 Rod 94N14, Taper
3078325 Rod 94N14, Taper
3078329 Rod 94N14, Taper
OEM Applications:
060161X-100
060161X100
3078360
3078380
3083981
3084058
3084060
3084981
3084992
3406738
3406739
3406739RX
3406742
3406742RX
3411780
3411813
3411814
3411814NX
3411814RX
3411817
5469793
HCM3078380
HCM3078380VS
N3078380
N3078380VS
