Toyota LandCruiser 1HZ 4.2L Diesel Cylinder Heads & Engine Parts

Looking for a premium aftermarket replacement Toyota 1HZ 4.2L diesel cylinder head? We supply brand-new complete heads, gasket sets, and internal engine components from premium Australian stock with rapid nationwide delivery.

The Toyota 1HZ 4.2L naturally aspirated inline-six diesel engine (LandCruiser 75, 78, 79, 80, 100 Series) is legendary for its durability, but heavy towing or aftermarket turbo conversions can cause severe thermal cracking between the valves or into the pre-combustion chambers. Common symptoms of a failed 1HZ head include constant bubbles in the radiator neck, pushing coolant into the overflow bottle, or localized overheating under load.

Why Choose Midland Cylinder Heads?

• Australian-Assembled Quality: Every brand-new cylinder head is built and inspected to strict OEM specifications by our licensed technicians, with all valve depths pre-set during assembly.
• Thickest MLS Gaskets: Our kits feature high-grade, thickest multi-layer steel (MLS) head gaskets engineered to handle block surfacing variations, ensure maximum clearance, and provide a perfect compression seal.
• Included Torque Specs: We include correct tightening sequences and torque specifications with every order to ensure a perfect installation.
• 12-Month Warranty: Drive with peace of mind with our 12-month, unlimited-kilometre warranty on all parts.
• Fast Dispatch & No Core Exchange: Units are sold completely outright (no need to send your old head back) with fast dispatch from our Perth and Melbourne hubs.

Our Parts Summary

• Brand New Assembled Cylinder Head: Premium replacement unit supplied with brand new valves and valve springs professionally fitted and vacuum-tested.
• Premium Head Gasket Set with Bolts: Comprehensive thickest-grade multi-layer steel (MLS) head gasket set with all required seals, pre-combustion chamber seals, and fresh Torque-to-Yield (TTY) stretch bolts.

If you need technical help or want to check stock on 1HZ components, call John directly on 0406 611 288. Please note we are parts specialists only—we do not provide mechanical vehicle fitting.

Browse 1HZ 4.2L Parts

Land Cruiser and Coaster 1990-2007 1HZ Engine
Machine/Surface your cylinder head. Please note that the valves must be set to a specific value below the cylinder head face. When we machine or surface the head, the valves may come closer to the face and potentially collide with the pistons. If the valve depth is not within specification, we may be unable to machine the face without reseating the valves, adjusting the shim tappets, and performing a complete service. From$276.00
Our workshop offers a comprehensive reconditioning service for your cylinder head. If your cylinder head has failed, bring it to us for inspection, and we will provide a repair quote. From $880.00
This new cylinder head is fully assembled, complete with the camshaft, shims, and valve clearances. It is ready to fit on your engine. Please note: Due to the weight, a delivery fee applies. Please provide us with your postcode. $2290.00 Available for phone orders.
This new cylinder head is fully assembled, complete with the camshaft, shims, and valve clearances. It is ready to fit on your engine. The gasket set, head bolts, head bolt sequence, and torque are included. Please note: Due to the weight, a delivery fee applies. Please provide us with your postcode. $2470.00 Available for phone orders.
The VRS head gasket set features the thickest head gasket, ensuring compatibility with all models. $298.00 Available for phone orders.
The VRS head gasket set with head bolts includes the thickest head gasket, ensuring compatibility with all models. $366.00 Order online or by phone. Pickup available in Perth (Midland) or fast dispatch from Melbourne.
New 1HZ Camshaft $380.00 Available for phone orders.