Cummins/Onan — Turbocharger - Remove and Install
Repair & overhaul
From a Cummins/Onan owner's manual covering: M11, M1i Series Engines, ps200da. Check it applies to your exact model before use.
Applies to: Cummins/Onan M11 engine
Procedure
- Remove the intake and exhaust pipes from the turbocharger.
- Remove the oil supply line and oil drain line from the turbocharger.
- If water-cooled, drain the cooling system and remove the water supply and return lines.
- Loosen the hose clamps on the aftercooler air inlet connection.
- Remove the four turbocharger mounting nuts.
- Remove the turbocharger and gasket.
- Apply a film of high temperature anti-seize compound to the mounting studs.
- Use a new gasket and install the turbocharger.
- Install the aftercooler air inlet hose and tighten the four mounting nuts.
- Install a new gasket on the oil drain line and install it to the bottom of the turbocharger.
- Pour 50 to 60 cc [2.0 to 3.0 ounces] of clean engine oil in the turbocharger oil supply line fitting.
- Install a new gasket on the oil supply line and install it to the top of the turbocharger.
- Install the intake and exhaust pipes and tighten the clamps.
- Operate the engine and check for air leaks.
Specs & values
- Turbocharger mounting nut torque: 61 Nm [45 ft-lb]
- Hose clamp torque: 8 Nm [75 in-lb]
- Oil drain line capscrew torque: 27 Nm [20 ft-lb]
- Oil supply line capscrew torque: 20 Nm [15 ft-lb]
- Water line torque: 35 Nm [25 ft-lb]
- Intake/exhaust pipe clamp torque: 8 Nm [72 in-lb]
Source: Cummins/Onan owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.