Product Information:
Type: Glow Plug
Material: Metal
Engine Model: 4HK1 5.5L, 4JJ1 3.0L
Application:
for Isuzu 4HK1 5.5L 4JJ1 3.0L Engine; for Isuzu NPR NQR NRR NPR-HD FTR FVR Reach ELF 200 300 400

Feature:
Safe start-up from low ambient temperatures
Low emissions during warm-up phase
Stable idling running before engine reaches operating temperature
High-quality coating on shell for high resistance to corrosion
Unique shell design for excellent heat transfer
Perfect gas-tight sealing
High shear torque
High resistance to deformation and security of the heating coils

What are the symptoms of a bad glow plug?
The most common symptoms of a bad glow plug are engine misfiring, hard starting, black or white exhaust smoke, decreased fuel efficiency and rough idling.

Disassembly and installation:
When a glow plug needs to be replaced, it is recommended to apply a synthetic engine oil around each glow plug and ideally let it penetrate for at least a week. This reduces the risk of shearing and makes removal easier. When removing, each glow plug should be manually disconnected from its electrical wire. When this is complete, each plug can be individually uninstalled with a suitable torque wrench.
Once an old glow plug is removed, a glow plug hole reamer loaded with silicone-free grease should be used to clean and empty each hole of carbon deposits. After that, the new glow plugs can be manually installed into their seats and then tightened with a correctly set torque wrench.