Heavy Duty Diesel Specs, Torque & Valve Lash
Zero-delay technical lookup for fleet technicians, shop foremen, and heavy equipment mechanics. Verified factory OEM torque sequences, overhead clearances, and fluid capacities.
Master Valve Lash & Jake Brake Feeler Selector
Select your engine model to see exact intake, exhaust, and engine brake slave piston clearances with step-by-step TDC cylinder firing order instructions.
2-Turn Crankshaft Adjustment Protocol
Firing Order: 1-5-3-6-2-4Select engine stroke position below to highlight exact cylinders, valves, and injectors ready for adjustment:
Heavy Diesel Engineering Pillars
Five dedicated technical directories built to factory service manual standards.
Valve Lash & Overhead
Feeler gauge thicknesses, intake/exhaust specs, and Jake brake clearances for Cummins, Detroit, Cat & PACCAR.
Oil & Coolant Capacities
Standard vs deep sump fill volumes, filter compensation, oil viscosity recommendations, and coolant capacities.
Head Bolt Torque
Torque-to-yield angle stages, bolt counts, thread sizes, and center-outward tightening patterns.
SPN / FMI Fault Codes
J1939 diagnostic trouble code solver, sensor wiring pinouts, derate severity, and probable cause matrices.
Fuel Burn & DEF Dosing
Fleet fuel consumption in GPH and MPG, SCR DEF dosing rates, and Brake Specific Fuel Consumption (BSFC) math.
Commercial Heavy Diesel Engine Spec Matrix
| Engine Model | Displacement | Intake Lash (Cold) | Exhaust Lash (Cold) | Jake Brake Lash | Oil Capacity (Std Sump) | Head Bolts | Quick Tools |
|---|---|---|---|---|---|---|---|
| Cummins ISX15 / X15 | 14.9L I-6 | .014 in (0.36 mm) | .027 in (0.69 mm) | .070 in (1.78 mm) | 11 Gal (44 Qts) | 38 Bolts | |
| Detroit Diesel DD15 (GHG14 / GHG17 / Gen 5) | 14.8L I-6 | .014 in (0.35 mm) | .027 in (0.70 mm) | .163 in (4.15 mm) | 11.25 Gal (45 Qts) | 38 Bolts | |
| Caterpillar C15 & C15 ACERT (6NZ / BXS / MXS) | 15.2L I-6 | .015 in (0.38 mm) | .030 in (0.76 mm) | .027 in (0.69 mm) on Jake Slave Piston | 10 Gal (40 Qts) | 26 Bolts | |
| PACCAR MX-13 (EPA10 / EPA13 / EPA17 / EPA21) | 12.9L I-6 | .016 in (0.40 mm) | .028 in (0.70 mm) | .055 in (1.40 mm) | 10.5 Gal (42 Qts) | 38 Bolts | |
| Detroit Diesel DD13 | 12.8L I-6 | .014 in (0.35 mm) | .027 in (0.70 mm) | .163 in (4.15 mm) | 10 Gal (40 Qts) | 38 Bolts | |
| Caterpillar 3406E (5EK / 2WS / 1MM) | 14.6L I-6 | .015 in (0.38 mm) | .030 in (0.76 mm) | .027 in (0.69 mm) | 10 Gal (40 Qts) | 26 Bolts | |
| Detroit Diesel DD16 (Heavy Haul 600 HP) | 15.6L I-6 | .014 in (0.35 mm) | .027 in (0.70 mm) | .163 in (4.15 mm) | 11.5 Gal (46 Qts) | 38 Bolts | |
| Detroit Diesel Series 60 (12.7L / 14.0L) | 12.7L I-6 | .008 in (0.20 mm) | .020 in (0.51 mm) | .026 in (0.66 mm) | 8 Gal (32 Qts) | 38 Bolts | |
| Volvo D13 / Mack MP8 (12.8L) | 12.8L I-6 | .008 in (0.20 mm) | .031 in (0.80 mm) | .063 in (1.60 mm) VEB+ | 9.5 Gal (38 Qts) | 38 Bolts | |
| Cummins B6.7 / ISB6.7 (Medium-Duty) | 6.7L I-6 | .010 in (0.25 mm) | .026 in (0.66 mm) | N/A (VGT Exhaust Brake) | 3.75 Gal (15 Qts) | 26 Bolts | |
| Navistar International DT466 / DT466E (7.6L) | 7.6L I-6 | .025 in (0.64 mm) | .025 in (0.64 mm) | .019 in (0.48 mm) | 7 Gal (28 Qts) | 26 Bolts | |
| Caterpillar C7 / C7 ACERT (7.2L) | 7.2L I-6 | .015 in (0.38 mm) | .025 in (0.64 mm) | .030 in (0.76 mm) | 7 Gal (28 Qts) | 26 Bolts | |
| Cummins N14 / N14 Celect Plus (14.0L) | 14L I-6 | .014 in (0.36 mm) | .027 in (0.69 mm) | .023 in (0.58 mm) | 9 Gal (36 Qts) | 36 Bolts | |
| Caterpillar C12 (12.0L) | 12L I-6 | .015 in (0.38 mm) | .025 in (0.64 mm) | .025 in (0.64 mm) | 9 Gal (36 Qts) | 26 Bolts | |
| Caterpillar C13 / C13 ACERT (12.5L) | 12.5L I-6 | .015 in (0.38 mm) | .030 in (0.76 mm) | .025 in (0.64 mm) | 9 Gal (36 Qts) | 26 Bolts | |
| Cummins L9 / ISL9 (8.9L Vocational) | 8.9L I-6 | .012 in (0.30 mm) | .022 in (0.56 mm) | .025 in (0.64 mm) | 6 Gal (24 Qts) | 26 Bolts | |
| PACCAR MX-11 (10.8L) | 10.8L I-6 | .016 in (0.40 mm) | .024 in (0.60 mm) | .055 in (1.40 mm) | 9 Gal (36 Qts) | 38 Bolts | |
| Cummins 5.9L 24-Valve / CR (ISB5.9) | 5.9L I-6 | .010 in (0.25 mm) | .020 in (0.51 mm) | N/A (Exhaust Flapper Brake) | 2.75 Gal (11 Qts) | 26 Bolts | |
| Caterpillar 3406B / 3406C Mechanical (14.6L) | 14.6L I-6 | .015 in (0.38 mm) | .030 in (0.76 mm) | .030 in (0.76 mm) | 9 Gal (36 Qts) | 26 Bolts | |
| Mercedes-Benz MBE 4000 / Detroit MBE4000 (12.8L) | 12.8L I-6 | .016 in (0.40 mm) | .024 in (0.60 mm) | .024 in (0.60 mm) | 9.5 Gal (38 Qts) | 36 Bolts |