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26-Piece Complete Cylinder Head Bolt Set – Toyota LandCruiser 1HZ 4.2L (70 & 80 Series)
Rebuild or replace your cylinder head with confidence on your Toyota LandCruiser 70 Series (HZJ70/HZJ73/HZJ75/HZJ78/HZJ79) or 80 Series (HDJ80/HZJ80) equipped with the legendary 4.2L 1HZ diesel engine. This complete 26-piece head bolt set includes all required bolts (M12 & M10) to securely clamp the cylinder head and prevent leaks, warping, or blow-by after a head gasket job, valve work, or a full engine rebuild. Essential for work trucks, troop carriers, or high-mileage Cruisers that have done years of towing, off-road abuse, or daily duties in Aussie heat and dust.
Key Features
Full 26-piece set – includes all cylinder head bolts (typically 10 x M12 long, 8 x M12 short, 8 x M10) as per factory spec for 1HZ
Direct replacement for OEM bolts on 1HZ 4.2L diesel engines (common ref 90910-021xx series or equivalent)
High-tensile Grade 10.9 or 12.9 steel construction – hardened, tempered, and torque-to-yield capable
Precision-rolled threads – superior strength and accurate torque application without stripping
Phosphate or black oxide coating – corrosion-resistant for long-term reliability in humid or salty conditions
Meets or exceeds Toyota OEM torque specs – designed for multi-stage torque + angle tightening procedure
Benefits
Secure head clamping – prevents gasket blowouts, coolant/oil mixing, or compression loss on these long-life 1HZ motors
Eliminates risk from reused/stretched old bolts – critical for head gasket success and engine longevity
Restores factory torque retention – essential after machining head/block or fitting a new gasket
Reduces risk of warping or cracking – proper clamping force protects expensive head and block components
Great for rebuilds, head gasket jobs, or high-mileage refreshes – keeps your 70/80 Series running strong
Essential for roadworthiness & reliability – weak or reused bolts can lead to catastrophic failure in NSW
Fitment Notes
Suitable for Toyota LandCruiser with 4.2L 1HZ diesel engine: 70 Series (HZJ70/HZJ73/HZJ75/HZJ78/HZJ79), 80 Series (HDJ80/HZJ80)
