The 1HZ is Toyota’s 4.2-litre naturally aspirated inline-six diesel, fitted to the LandCruiser 70, 75, 78 and 79 Series, the 80 and 105 Series wagons, and the Coaster. It runs a timing belt, not a chain. Owners come here for rebuild kits, turbo kits and intercoolers, gaskets, timing parts and Manta exhausts.
Showing 1–24 of 306 results
1HZ by vehicle
Showing 1–24 of 306 results
-
Select options This product has multiple variants. The options may be chosen on the product page -
Select options This product has multiple variants. The options may be chosen on the product page -
Select options This product has multiple variants. The options may be chosen on the product page
Turbocharging a 1HZ: talk to us first
The 1HZ left the factory without a turbo, and adding one is the most common thing owners ask us about. It is not just the turbo: you need the manifold, oil feed and drain, intercooler plumbing where fitted, and you need to know what your pistons and head will take before you start adding boost. Talk to us about your build before you buy parts. A 400,000km 1HZ and a freshly machined one are different jobs.
Turbo kits are listed for the 75, 78 and 79 Series, the 80 Series and the 100 and 105 Series, with 1HZ intercoolers and turbo-back exhausts made to suit CT26, Garrett and DTS turbos.
Building the bottom end for boost
If the rebuild is when the turbo goes on, start with the high performance 1HZ rebuild kit. FAST ceramic coated turbo pistons and an ARP head stud kit are listed with it, as is an MLS performance head gasket matched to a piston protrusion range. Pick the head gasket from the protrusion your machinist measures, not by guesswork.
Sizes for a 1HZ rebuild kit
Pick from the naturally aspirated, turbo and high performance rebuild kits. Kits include pistons, rings, bearings and a full gasket set. Piston, main and conrod bearing sizes are all selectable from standard through oversize, so if your block has been machined, order to the measured size rather than guessing. Send us the machine shop figures and we will confirm the kit before it ships. Our bearing and piston sizes page explains the numbers, and the 1HZ engine guide goes further into turbo conversions and rebuild costs.
Other 1HZ parts we stock
Head gaskets and full gasket sets, timing belts, gears and seals, the injection pump gear, oil pump covers, harmonic balancers, rocker covers and cooling parts. Beyond the engine there are NPC clutch kits, plus Manta extractors and exhausts for the 70, 80 and 105 Series. Genuine Toyota parts sit alongside aftermarket listings, and the title says which is which.
Common 1HZ questions
Is there a 1HZ rebuild kit for a turbo build?
Yes. A high performance 1HZ rebuild kit is listed alongside the standard kits, and FAST ceramic coated turbo pistons are sold separately. Which way to go depends on the block, the head and the boost you plan to run, so talk to us before you order.
Does the 1HZ use a timing belt or a chain?
A timing belt, not a chain. Genuine timing belts, gears, seals and the idler bolt are listed here, and a rebuild is the time to replace them rather than refit the old belt.
How much is the 1HZ high performance rebuild kit?
It starts at $2,434.00, depending on the sizes you choose. The kit is specified for turbo 1HZ engines and uses FAST turbo pistons with oil cooled crowns.
What comes in the ARP head stud kit for the 1HZ?
A full set of ARP studs, washers and nuts, ARP High Torque lubricant and an instruction sheet. The kit suits the 1HD-T and 1HZ and is $1,150.00.
