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The TD42 is Nissan’s 4.2-litre inline-six diesel, fitted to the Patrol GQ Y60 (1987 to 1997) and GU Y61 (1997 to 2007) in naturally aspirated and factory turbo form. Rebuild kits are the main reason people land here, along with injector lines, gaskets, intercoolers, NPC clutch kits and Patrol exhausts.
TD42 by vehicle
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Select options This product has multiple variants. The options may be chosen on the product page Quick View -
Select options This product has multiple variants. The options may be chosen on the product page Quick View -
Select options This product has multiple variants. The options may be chosen on the product page Quick View
Which rebuild kit do I need?
TD42 naturally aspirated and TD42 turbo take different pistons. A turbo kit in an N/A block, or the reverse, will not give you the compression ratio you are after. If you are stepping up to turbo as part of the rebuild, order the turbo-upgrade kit or the performance turbo-upgrade kit. An engine staying naturally aspirated takes the N/A kit. Piston, main and conrod bearing sizes are selectable in standard and oversize. Tell us what the block and crank have been machined to and we will confirm before it ships. If the docket from the machinist reads like code, our sizes explainer decodes it.
Why our kits cost more than the cheap ones
There are much cheaper TD42 kits online. They are not the same parts. Ours are matched sets, with the pistons, rings, bearings and gaskets specified together for the block, and someone on the phone who knows the engine. A rebuild is a weekend of your time and a machine shop bill on top. The kit is the last place to cut a corner.
More TD42 parts on the shelf
Genuine injector lines and injectors, head and full gasket sets, timing gear, water pumps and cooling parts. For the bottom end there are ACL Race and NDC copper lead bearing sets, and a Powerbond harmonic balancer for the non-turbo engine. Around the engine, GT28 and GTX28 turbo kits for the GQ, Patrol intercooler kits and NPC clutch and flywheel kits are listed too. The TD42 engine guide compares the N/A and factory turbo engines and the upgrades that suit each.
TD42 rebuild FAQs
Can I put turbo pistons in a non-turbo TD42?
Only as part of a planned turbo conversion. The N/A and turbo engines take different pistons, and mixing them leaves you with the wrong compression ratio. If you are adding a turbo during the rebuild, order the turbo-upgrade kit and talk to us about the rest of the build first.
What is in a TD42 rebuild kit?
Pistons, rings, main and conrod bearings and gaskets, specified together for the block. Bearing and piston sizes are picked to suit what the machinist has done, so have the figures ready or send them after you order, and we confirm them before the kit leaves.
