Glow Plug: Service and Repair

PLUG-GLOW

REMOVAL

CAUTION:
- If necessary, remove hindering components to ease access.
- Do not bend, knock, or drop the glow plugs while handling (any mechanical impact may damage the glow plug).
- First loosen the glow plug with a wrench then screw it out by hand or with assistance of a flexible tool (e.g. with a rubber hose).
- Compare the removed glow plug with a new one. If there are missing parts of the ceramic heating element, remove all fragments from the combustion chamber before you start the engine. CYLINDER HEAD WILL NEED TO BE REMOVED




1. Disconnect negative battery cable.
2. To access the glow plug for cylinder number one, no additional components need to be removed.
3. To remove the glow plug for cylinder number two, remove the rear generator bracket.
4. To remove the glow plug for cylinder number three, remove the EGR pipe from the intake elbow and remove the intake elbow.
5. To remove the glow plug for cylinder number four, relocate the fuel filter assembly.
6. Disconnect glow plug electrical connectors.
7. Remove glow plugs from cylinder head.

INSTALLATION

CAUTION:
- Before a new glow plug is installed, make sure that the thread of glow plug and glow plug bore in the cylinder head is dry, clean, and oil/grease-free
- Check the resistance of the glow plug with an appropriate multi-meter, resistance should be less than 0.8 ohms.
- Tighten the glow plug by hand or means of a flexible tool (e.g. rubber hose) as far as possible and finish tightening with a correctly set torque wrench.




- Strictly observe the required tightening torque.
- Do not bend, knock, or drop the glow plug while installing.

- If a fragment of the ceramic heater of the glow plug has fallen into the combustion chamber, the cylinder head MUST be removed.

1. Install glow plugs all the way into cylinder head, hand tight, until the thread stops.

CAUTION: Strictly observe the required tightening torque. If tightening torque was to high, remove and replace the glow plug.

2. Tighten glow plugs to 12.5 N.m (110 in. lbs.).
3. Connect glow plug electrical connectors.
4. Install any components that were removed for access.
5. Connect negative battery cable.
6. Test the glow plug system for proper operation before starting the engine.