Machter Auto
Glow Plugs (6 Pcs) - Suitable for Use with Toyota Landcruiser 1HZ 1990-2007 4.2L Diesel 70 80 100 105 Series
Glow Plugs (6 Pcs) - Suitable for Use with Toyota Landcruiser 1HZ 1990-2007 4.2L Diesel 70 80 100 105 Series
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Glow Plugs (Set of 6) – Toyota LandCruiser 1HZ 4.2L Diesel 70 80 100 105 Series 1990-2007
Fix hard cold starts, long cranking, white smoke on startup, rough idle or weak glow plug performance on your Toyota LandCruiser 70 Series (HZJ70/HZJ73/HZJ75/HZJ78/HZJ79), 80 Series (HZJ80), 100 Series (HZJ105) or 105 Series with the 4.2L 1HZ 6-cylinder diesel (1990-2007) with this brand-new set of 6 glow plugs. Direct replacement for the factory plugs – ideal for work utes, troop carriers, wagons or high-mileage Cruisers that struggle to fire in cooler Sydney/regional mornings or after sitting 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 1990-2007 1HZ models (70/80/100/105 Series)
- Self-regulating sheathed element design – fast heat-up, long life and reliable starting
- Thread size: M10 x 1.0, voltage: 12V – matches factory specification
- Corrosion-resistant body and secure electrical terminal
- Compatible with factory or aftermarket glow plug relay, timer and controller
Benefits
- Faster, more reliable cold starts – less cranking and white smoke in cooler weather
- Smoother idle and reduced smoke on startup – better for the crew and environment
- Longer life than old or cheap glow 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 Cruiser firing first time
Fitment Notes
- Suitable for 1990-2007 Toyota LandCruiser with 4.2L 1HZ 6-cylinder diesel: 70 Series (HZJ70/HZJ73/HZJ75/HZJ78/HZJ79), 80 Series (HZJ80), 100 Series (HZJ105), 105 Series
- 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 for voltage drop
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Frequently Asked Questions
What is the function of glow plugs in a 1HZ diesel engine?
Unlike petrol vehicles that use spark plugs, the indirectly injected 1HZ diesel engine relies on high combustion chamber temperatures to ignite fuel. Glow plugs are specialized heating elements that pre-heat the engine's pre-combustion chambers. This thermal layout allows the atomized diesel to combust cleanly and efficiently during cold starts, especially in freezing outback mornings.
Which specific LandCruiser models and years does this 6-piece kit fit?
This complete 6-piece glow plug package is engineered strictly to suit Toyota's iconic 4.2-litre 6-cylinder naturally aspirated 1HZ diesel engine built between 1990 and 2007. It is a direct physical fit across generations of heavy-duty workhorses, including the 70/75/78/79 Series (HZJ75, HZJ78, HZJ79), the 80 Series (HZJ80), and the 100/105 Series (HZJ105) wagon layouts.
What are the primary symptoms of failing or burnt-out glow plugs?
The most unmistakable sign is an engine that is incredibly hard to start when cold, requiring excessive cranking before finally firing. Other key indicators include the engine idling rough, missing, or stumbling for the first few minutes after a cold start, alongside a heavy cloud of white or grey unburnt fuel smoke billing from the exhaust pipe on startup.
Why should I replace all six glow plugs together rather than individually?
Glow plugs are electrical consumption items that endure identical heating cycles, voltage spikes, and thermal stresses. When one plug burns out or suffers high internal resistance, it signals that the remaining plugs are near the end of their operational lifespan. Replacing all six together ensures uniform heat distribution and prevents electrical imbalances down the factory glow plug busbar.
What critical safety steps must be taken during the installation process?
Proper execution is mandatory to prevent terminal damage to your cylinder head. Always disconnect the vehicle's batteries before working near the live 12V busbar. Clean any carbon soot or dirt away from the plug wells before removing the old units. When installing the fresh plugs, always thread them in entirely by hand first to avoid cross-threading the fine cylinder head threads, then use a calibrated torque wrench to tighten them precisely to factory metric specifications.
