Machter Auto
Glow Plugs (6 PCE) - Suitable For Toyota Landcruiser HZJ75 HZJ78 HZJ79 HZJ105 Diesel 6cyl 4.2 1HZ
Glow Plugs (6 PCE) - Suitable For Toyota Landcruiser HZJ75 HZJ78 HZJ79 HZJ105 Diesel 6cyl 4.2 1HZ
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Glow Plugs (Set of 6) – Toyota LandCruiser HZJ75 HZJ78 HZJ79 HZJ105 4.2L 1HZ Diesel
End hard cold starts, excessive white smoke, rough idle after cranking, or weak glow plug operation on your Toyota LandCruiser HZJ75, HZJ78, HZJ79, or HZJ105 (4.2L 1HZ 6-cylinder diesel) with this brand-new set of 6 glow plugs. Direct replacement for the factory plugs – ideal for work utes, troop carriers, long-wheelbase wagons, or high-mileage rigs that struggle to fire up in cooler Sydney/regional mornings or after sitting for days in the outback.
Key Features
- Set of 6 glow plugs – complete for the 1HZ 6-cylinder diesel engine
- Direct fit replacement for original Toyota glow plugs on HZJ75 / HZJ78 / HZJ79 / HZJ105 models (1990s-2007 1HZ variants)
- Self-regulating sheathed element design – fast heat-up and long life
- Thread size: M10 x 1.0, voltage: 12V – matches factory spec
- Corrosion-resistant body and reliable terminal connection
- Compatible with factory or aftermarket glow plug relay/timer/controller
Benefits
- Faster, more reliable cold starts – less cranking and white smoke in cooler weather
- Smoother idle & less smoke on startup – better for the crew and environment
- Longer service life than old or cheap plugs – fewer failures and repeat replacements
- Restores factory starting performance – essential for roadworthy checks and daily reliability in NSW
- Great for high-mileage work rigs, off-road builds or resto projects – keeps your 1HZ-powered 70/105 Series firing first time
Fitment Notes
- Suitable for Toyota LandCruiser HZJ75 / HZJ78 / HZJ79 / HZJ105 with 4.2L 1HZ 6-cylinder diesel engine
- Professional installation recommended – torque to spec (usually 15-20 Nm) and test glow plug relay/timer
- Replace all 6 at once for even performance – inspect harness, relay, and controller while you’re in there
- If cold-start issues persist, check battery voltage, glow plug timer, and wiring harness for voltage drop
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Frequently Asked Questions
What is the core function of glow plugs in a 1HZ diesel engine?
Because Toyota's 1HZ is an indirectly injected diesel engine, it relies heavily on high combustion chamber ambient heat to ignite compression strokes from a cold start. These glow plugs act as extreme high-temperature heating probes within the pre-combustion chambers. Their thermal layout ensures that atomized fuel vapor instantly catches fire on startup, giving you smooth ignition on cold outback mornings.
Which Toyota LandCruiser models and series is this 6-piece plug kit suitable for?
This high-performance replacement kit is configured explicitly for the iconic 4.2-litre 6-cylinder naturally aspirated 1HZ diesel engine assembly. It is a direct fit across legendary 70 and 100 series heavy-duty platforms, including the leaf-sprung HZJ75, the coil-sprung HZJ78 Troop Carrier, the HZJ79 Cab-Chassis/Utility, and the live-axle HZJ105 Wagon variations.
What are the signs that my 1HZ engine's glow plugs are worn out or burnt?
The most glaring warning symptom is a diesel engine that requires extended, strenuous cranking times before finally staggering to life when cold. You might also notice a highly erratic, rough mechanical idle during the first few minutes of operation, or see a dense plume of white, sweet-smelling unburnt fuel smoke exiting the tailpipe right as the engine fires up.
Why should I replace the full set of 6 plugs instead of just the failed one?
Glow plugs are electrical consumption wear items subjected to identical electrical pulses, high current flow, and cyclic engine fire temperatures. When one plug fails or degrades in resistance, it indicates the remainder of the factory set is near fatigue limits. Replacing all six together provides a uniform thermal balance down the factory high-current connector busbar layout and protects your starter motor from over-cranking wear.
What critical step must be taken when installing these new glow plugs?
Proper execution during installation is paramount to avoid stripping or cracking your cast-iron or aluminum head ports. Ensure you disconnect the negative battery leads before touching the live 12V supply rails. Clean out any loose dirt or scale surrounding the old plug recesses prior to extraction. Always spin the replacement plugs all the way in by hand first to guarantee correct alignment, then lock them down using a precision torque wrench to factory specifications.
