2020 Kenworth W900 Spark Plug Type & Gap
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
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Quick reference
| Engine | OEM Plug PN | Aftermarket (NGK/Denso/Motorcraft/ACDelco) | Gap (in/mm) | Torque (lb-ft / Nm) | Interval |
|---|---|---|---|---|---|
| PACCAR MX-13 | N/A (Diesel) | N/A (Diesel) | N/A (Diesel) | N/A (Diesel) | N/A (Diesel) |
| Cummins X15 | N/A (Diesel) | N/A (Diesel) | N/A (Diesel) | N/A (Diesel) | N/A (Diesel) |
Why the right plug matters
It's crucial to understand that the 2020 Kenworth W900 is a heavy-duty truck offered exclusively with diesel engines, specifically the PACCAR MX-13 and Cummins X15. Unlike gasoline engines, diesel engines do not use spark plugs for ignition. Instead, they rely on compression ignition. Air is compressed to such a high degree that its temperature rises significantly, igniting the atomized diesel fuel injected into the cylinder.
Therefore, discussions about spark plug heat range, electrode metal (iridium, platinum, copper), and various spark plug part numbers are not applicable to the 2020 Kenworth W900. There are no spark plugs to gap, no specific torque settings, and no replacement intervals for spark plugs on these engines.
How to gap a spark plug
This section is not applicable to the 2020 Kenworth W900, as it is a diesel vehicle and does not utilize spark plugs.
Replacement procedure tips
Again, this section is not applicable. The components involved in a diesel engine's ignition system are glow plugs (for cold starting assistance) and injectors, which have very different maintenance procedures compared to spark plugs.
Known issues
There are no "known issues" regarding spark plugs for the 2020 Kenworth W900 since it does not use them. Issues commonly associated with spark plugs in gasoline engines (like cracked porcelain on Ford 3-valve engines or broken plug shells) do not apply to this diesel application.
Need plugs replaced? Find a shop on Repairius.
More specs for the 2020 Kenworth W900
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2020 Kenworth W900 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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