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C4981331 XCMG GR2605 motor grader air intake manifold
Part Number: C4981331 (4981331)
Type: 6-Cylinder Air Intake Manifold / Inlet Manifold
Material: High-Strength Cast Iron / Ductile Iron
Structure: Integrated Plenum + 6 Independent Runners, Side-Flange Inlet
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Product Details:
C4981331 XCMG GR2605 motor grader air intake manifold
C4981331 (4981331) is a genuine Cummins air intake manifold, a critical distribution component in the engine intake system. Precision-cast from high-strength cast iron / ductile iron, it integrates a plenum chamber with 6 independent runners and smooth internal passages, featuring high temperature resistance, vibration resistance, uniform air distribution, robust structure, and long service life. Mounted on top of the cylinder head, it evenly distributes cooled, pressurized clean air to each cylinder intake port, ensuring efficient combustion, stable power, and compliant emissions.
Technical Parameters
Part Number: C4981331 (4981331)
Type: 6-Cylinder Air Intake Manifold / Inlet Manifold
Material: High-Strength Cast Iron / Ductile Iron
Structure: Integrated Plenum + 6 Independent Runners, Side-Flange Inlet
Connections: Inlet Flange Φ70~80mm, 6 Cylinder Ports Φ45~50mm
Operating Temperature: -40℃ to +220℃
Operating Pressure: ≤0.3MPa (3bar)
Tightening Torque: 23±3.6N·m
Cross Reference: 4981336, 4981330, 5267077
Standard: Cummins Original, ISO 9001
Application
Applicable Engines: Cummins ISDe6.7, ISB6.7, QSB6.7, ISBe, 6ISBE series
Equipment:
- Commercial Vehicles: Dongfeng Tianlong, Tianjin, Dalishen, Foton Aumark/OLINK
- Construction Machinery: Komatsu PC200-8, Sany SY215, XCMG XE215 Excavators
- Generator Sets: 100~150kW Cummins Diesel Generators
- Industrial Equipment: Air Compressors, Pump Units, Oilfield Machinery, Marine Engines
Installation Locations:
- Top of Cylinder Head, connecting intercooler outlet to cylinder intake ports
- Mounting for Intake Air Pressure/Temperature Sensor
- Ports for Crankcase Ventilation & EGR Tubing
- Integration point for Air Heater (Cold Start Aid)
Common Faults & Troubleshooting
1. Crack / Breakage / Leakage
- Causes: Vibration fatigue, thermal shock, freeze damage, material defects
- Symptoms: Rough idle, power loss, black smoke, high fuel consumption, hissing noise
- Solution: Replace C4981331; check mounts, eliminate resonance, winterize
2. Gasket Leakage / Carbon Buildup
- Causes: Worn gasket, high temp oxidation, loose bolts, improper installation
- Symptoms: Air leaks, soot buildup, low boost, performance degradation
- Solution: Install new OEM gasket, clean flanges, torque to specification
3. Runner Restriction / Carbon Deposits
- Causes: Failed air filter, oil vapor, dust deposits, foreign objects
- Symptoms: High intake restriction, poor acceleration, high exhaust temp
- Solution: Clean or replace manifold; replace air filter, check CCV system
4. Damaged Sensor Bung
- Causes: Improper service, thread damage, impact
- Symptoms: Sensor faults, MIL on, rough idle, unstable power
- Solution: Repair threads or replace C4981331; follow sensor service guidelines
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4 C4981331 intake manifold
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