Manufactured from high quality aluminium castings, then precision machined, this replacement 4-port cylinder head is brand new and comes completely bare. It will suit Nissan common rail diesel models (CRD) with the 4 port intake. If you're looking at sourcing your own componentry or doing a head swap on a budget, then this bare head is the way to go.

Contents:

• 1 X Bare cylinder head

Vehicle Fitment Guide

Note: Assembled cylinder head, VRS kit and head bolt set for Nissan YD25 engine can be purchased through other listings.

Manufactured from high quality aluminium castings, then precision machined, this replacement 4-port cylinder head is brand new and comes completely assembled. It will suit Nissan common rail diesel models (CRD) with the 4 port intake. No need to source any extras as it already includes valves, valve stem seals, springs, shim buckets and camshafts. Valve clearance has been preset to prevent any complications during install, simply bolt on and drive away!

Contents:

• 1 X Assembled cylinder head
• 1 X VRS gasket kit
• 1 X Head bolt set

Vehicle Fitment Guide

Note: Bare cylinder head, VRS kit and head bolt set for Nissan YD25 engine can be purchased through other listings.

Timing chains are known to stretch on the YD25 engine, even at a very low distance travelled. This kit has been developed to ensure the problem is solved once and for all and there is no need to worry about it ever again.

About The Kit:

Chains:

We offer customers a choice between genuine Nissan and German Iwis chains. Iwis chains cannot be used with genuine or aftermarket sprockets (other than ours) due to differences in pitch and width. We supply Australian made sprockets manufactured to suit the pitch and width of each chain. The Iwis chain we offer is used in many European high performance vehicles. For example, a 60 link Iwis chain, with its highly polished low friction link plates, is used as an upgrade for the primary timing chain for the Lamborghini Murcielago SV. Our fuel pump drive chain is a 94 link version of the one used for the Lamborghini.

Before deciding which chains to supply with this kit, extensive testing of the German Iwis chain and aftermarket fuel pump chains was undertaken. There was no need to test the genuine Nissan chain. Each chain was subjected to in vehicle testing comprising 400 hours engine running time. The results showed that the aftermarket chains (all of which had harder pins than the Iwis chain) had wear to the pins and bushings ranging from 3.0mm to 4.5mm while the Iwis chain had the least wear at 0.5mm. These results do not support claims that harder pins lead to longer chain life. Aftermarket chains are easily identified by plain packaging and the absence of manufacturer stamp, name or logo.

Sprockets:

Some aftermarket sprockets do not correctly mesh with a genuine Nissan chain. The poor fitting chain wrap on the aftermarket sprockets will cause rapid chain wear and imminent chain failure. The "Yd25.com.au" brand sprockets fit perfectly thus guaranteeing maximum chain and sprocket life.

Original factory YD25 crankshaft and vacuum pump sprockets and some of the aftermarket sprockets that we know of are made from SMF4040 carbon steel. The process of manufacture is powder metallurgy sintered metal. The later YD25 engines with common rail injection require higher fuel pressures which places the crankshaft sprocket under higher loads than earlier engines. Higher loads mean more wear to carbon steel sprockets. To handle these higher loads, the crankshaft sprocket is manufactured from billet 4340 high tensile steel and the vacuum pump sprocket from billet 4140 high tensile steel. Both sprockets are nitride hardened. While carbon steel sprockets can be manufactured for a fraction of the cost of a fully machined high tensile steel sprocket, our aim is to provide a high quality sprocket backed by a five year, 100,000km warranty. The Brisbane based sprocket manufacturer has over 50 years experience in sprocket design and manufacture. Every YD25 sprocket is subject to a stringent quality assurance process before leaving the factory. 

Upgrading To Duplex:

Our timing chain kit is a conversion kit. All competitors kits are modification kits.

Conversion Kit:

With our kit, to convert the vac pump to duplex, simply remove the single row sprocket and replace it with our duplex sprocket. It is that simple.

Modification Kit:

The process is not that simple with competitors modification kit. The vacuum pump is fitted with modified internal parts. To achieve this most workshops go through the following steps.

Removal of the engine from the car.
Remove the fuel pump from the engine.
Remove the vacuum pump from the engine.
Dis-assemble the vacuum pump.
Fit modified vacuum pump shaft to the vacuum pump housing.
Assemble the vacuum pump.
Fit duplex sprocket to the vacuum pump shaft.
Refit the vacuum pump to the engine.
Refit the fuel pump to the engine.
Due to the limited space in which to remove the fuel pump and vacuum pump with the engine in the car, the engine is usually removed when fitting a modification kit. Owners need to be aware that fitting a modification kit the vacuum pump and fuel pump sealing surfaces are disturbed with the potential for ingress of grit on the o-ring seals which significantly increases the potential for oil leaks. Dis-assembly of the vacuum pump can also damage internal components and casing (which are a non-serviceable items) requiring a complete pump replacement.

Tensioners:

This kit includes genuine Japanese Tsubaki tensioners in their original Nissan packaging. These are the best available. The top tensioner is supplied with an additional fail safe component. When new chains and guides are fitted, the fail safe component only allows the tensioner to back off 1.0mm. Without the fail safe, the tensioner can back off 7.0 to 8.0 mm which, when combined with 3.0 to 4.0mm of wear to the chain, can result in the chain jumping teeth. We have found aftermarket tensioners to have high valve failure rates. These tensioners come in plastic bags or white boxes with no manufacturer stamp, name or logo. Failed aftermarket tensioners have cost some owners their engine.

Special Tools:

A scissor gear tool is included in each kit to assist installers to maintain the pretension between the scissor gear and the idler gear during removal and installation. Failure to maintain the pretension and timing will cause vibrations putting undue stress on the engine internal components.

Contents:

• 1 X Duplex fuel pump sprocket
• 1 X Duplex crankshaft sprocket (Australian made)
• 1 X Duplex vacuum pump sprocket (Australian made)
• 1 X Duplex fuel pump drive chain (genuine Nissan Japan or Iwis Germany)
• 1 X Duplex camshaft drive chain (genuine Nissan)
• 1 X Cam chain tensioner (genuine Nissan, plus an Australian made fail-safe component)
• 1 X Fuel pump chain tensioner (genuine Nissan) 
• 1 X Crankshaft oil seal
• 1 X Scissor gear tool (Australian made)
• 1 X Oil pump o-ring set
• 7 X Quality chain guide

Vehicle Fitment Guide

Parts Guide

Please select the part number you require from the drop down menu by utilising our vehicle fitment guide and parts guide.

Notes:

• This timing chain kit does not suit 140kW models. Please check your vehicle before purchasing if you are unsure, or contact us for assistance.
• We offer a five year, 100,000km chain and sprocket warranty. This is five times the industry standard. Evidence that the vehicle has been serviced according to Nissan guidelines will be required to support a warranty claim. The warranty covers premature wear to chains and sprockets. Damage as a result of incorrect installation by anyone apart from us, other parts failing causing chain and sprocket damage or continuing to drive the vehicle when there is an unusual noise coming from the motor rather than having it repaired will not be covered by our warranty. 
• All other timing chain components are covered by a 12months/20,000kms warranty.

SAAS Trax series 4×4 differential breather kit is a must for 4wd vehicles that frequently wade through water. This kit has been designed to elevate the breathing ports in the differential, allowing the air inside them to contract due to being submerged in cool water, without water entering in them.

This breather kit has 2 ports for front and rear diffs and 2 ports for gearbox and transfer case if required.

Key Features:

• Stops water entering your differentials, transmission and transfer case.
• Billet machined aluminium manifold.
• Rear mounted washable filters sit out of sight and away from the elements. 
• Universal compact design.
• All ports are isolated and protected from contaminating the other in the event of mechanical failure or flow back.

Specifications:

• Thread size: 1/8”BSP

Contents:

• 01 x Manifold Block

• 01 x M6 bolt x 35mm

• 01 x M6 washer

• 01 x 8mm polyethylene hose 12M length

• 02 x 8mm polyethylene hose (spring style) 2M length

• 02 x 1/8" BSP plug block off nut

• 04 x 8mm to 8mm push in joiner

• 04 x 8mm to 1/8" BSP elbow push in fitting 

• 04 x 1/8" BSP brass filter (silencer)

• 06 x 8mm straight push in fitting

• 30 x cable ties

• Fitting instructions

Vehicle Fitment Guide

Notes:

• Full comprehensive fitting kit included.
• Some vehicles may have a different thread size or factory breather style and may require an adaptor or custom made solution. Please check the thread sizes first before making a purchase.
• Please make sure that the air filters in this kit are not obstructed in anyway as incorrect fitting can cause damage to the differential or gear box.
• Once installation is complete, you should have some left over hose that can be used with the supplied hose joiner fittings to make an emergency repair kit, if needed when off-roading.

This AJUSA Valve regrind gasket set (VRS) is designed to meet and exceed OEM specifications. Each item of this set has been checked and evaluated, so you can be assured of quality fitment every time.

This VRS gasket set suits Nissan vehicles fitted with YD25DDT YD25DDTI I4 engines.

Contents:

• 1 X VRS gasket set

Vehicle Fitment Guide

This Valve regrind gasket set (VRS) is designed to meet and exceed OEM specifications. Each item of this set has been checked and evaluated, so you can be assured of quality fitment every time.

This VRS gasket set suits Nissan vehicles fitted with Non-common rail ZD30 I4 engines.

Contents:

• 1 X VRS gasket set

Vehicle Fitment Guide

Note: A VRS Gasket set to suit the Patrol GU-Y61 Common rail ZD30 engine can be purchased through another listing.

Premium valve regrind gasket (VRS) and head bolts combo set is designed to meet and exceed OEM specifications. Each item in this set has been checked and evaluated, so you can be assured of quality fitment every time.

Head bolts play a vital role in the sealing of the combustion chamber, oil/coolant channels and ambient air. Therefore, we recommend our cylinder head bolt set for the task. Having met and exceeded OEM specifications, these quality bolts are suited for standard and mildly modified applications. These are a torque-to-yield (TTY) type bolt which means they can be tightened past their elastic limit, guaranteeing high and uniform clamping forces. No-retorquing is necessary after correct installation procedures have been followed.

This valve regrind gasket set and head bolts combo pack suits Nissan vehicles fitted with YD25DDT and YD25DDTi Turbo Diesel I4 engines.

Specifications:

• Head gasket thickness: 1.025mm.

Contents:

• 01 X VRS gasket set
• 18 X Head bolt (M11 X 1.25 X 118)

Vehicle Fitment Guide

Notes:

• This set only suits YD25 engines with a 4 inlet port cylinder head.
• This set includes the two common rocker cover gaskets used so it is suitable for both Thai and Spanish built engines.
• When torquing up bolts, an accurate torque wrench or angle gauge will be required to achieve correct clamping forces.
• Please follow the torque specifications as recommended by the service manual.
• TTY bolts are only to be utilized once due to permanent elongation and safety concerns.

The strict regulations that modern cars must adhere to these days mean any enjoyment you can have behind the wheel is quite limited. Unfortunately, the control systems put in place restrain the engine's performance and prevent you from experiencing its full potential. Our electronic throttle controllers are just a small device that can help you restore that exhilarating sensation you’re currently missing out on without illegally interfering with any major componentry.

The factory drive-by-wire system actually dulls down throttle response and, in turn, makes the engine feel as though it's lacking power until a certain throttle percentage is achieved. Even then, specific conditions need to be met for the engine to make peak power. This can become quite frustrating and even unsafe in some circumstances. The Mace throttle controller eliminates this delay that exists between the throttle pedal and the butterfly in the throttle body, re-establishing throttle response and bottom-end acceleration.

In addition to sharper throttle response, our controllers also have an economy mode which basically does the opposite. By powering down the signal to the throttle, the delay in throttle response is magnified. The benefit being improved fuel economy over longer trips and smoother transitions in throttle percentage.

Modes:

1. Sport Mode: 9 stages of increased accelerator response suited for spirited driving.
2. Economy Mode: Reduced accelerator response suited for economy driving around towns and on highways.
3. Normal Mode: Factory throttle response.

Features:

• OBD.II free, meaning power is sourced directly from the pedal and additional plugs are no longer required.
• Temperature ranges from -40~+125 °C.
• Previously set stage numbers are retained thanks to Power off memory function.
• Improves low torque.
• Plug and play, Using the same OEM harness.
• Digital signal output AD/DA up to 10 Bit, efficiently responds to the original throttle signal.

Vehicle Fitment Guide

Notes:

• Electronic throttle controllers for other makes and engines can be purchased through other listings.
• Installation is quite simple and the modification is completely reversible within a couple of minutes. All kits include simple fitting and calibration instructions.

The strict regulations that modern cars must adhere to these days mean any enjoyment you can have behind the wheel is quite limited. Unfortunately, the control systems put in place restrain the engine's performance and prevent you from experiencing its full potential. Our electronic throttle controllers are just a small device that can help you restore that exhilarating sensation you’re currently missing out on without illegally interfering with any major componentry.

The factory drive-by-wire system actually dulls down throttle response and, in turn, makes the engine feel as though it's lacking power until a certain throttle percentage is achieved. Even then, specific conditions need to be met for the engine to make peak power. This can become quite frustrating and even unsafe in some circumstances. The Mace throttle controller eliminates this delay that exists between the throttle pedal and the butterfly in the throttle body, re-establishing throttle response and bottom-end acceleration.

In addition to sharper throttle response, our controllers also have an economy mode which basically does the opposite. By powering down the signal to the throttle, the delay in throttle response is magnified. The benefit being improved fuel economy over longer trips and smoother transitions in throttle percentage.

Modes:

1. Sport Mode: 9 stages of increased accelerator response suited for spirited driving.
2. Economy Mode: Reduced accelerator response suited for economy driving around towns and on highways.
3. Normal Mode: Factory throttle response.

Features:

• OBD.II free, meaning power is sourced directly from the pedal and additional plugs are no longer required.
• Temperature ranges from -40~+125 °C.
• Previously set stage numbers are retained thanks to Power off memory function.
• Improves low torque.
• Plug and play, Using the same OEM harness.
• Digital signal output AD/DA up to 10 Bit, efficiently responds to the original throttle signal.

Contents:

• 1 X Electronic throttle controller

Vehicle Fitment Guide

Notes:

• Electronic throttle controllers for other makes and engines can be purchased through other listings.
• Installation is quite simple and the modification is completely reversible within a couple of minutes. All kits include simple fitting and calibration instructions.

NPR® (Nippon Piston Ring) was established in 1931 and have six manufacturing plants in Japan and further 9 plants in USA, Europe and Asia employing 2310 staff. NPR® is recognized as a world leading manufacturer and is original equipment to major Japanese and European automotive companies.

NPR's unrivalled piston rings are manufactured to exacting specifications so proper fit and clearance is achieved. When it comes to enduring the extreme conditions that occur in the combustion chamber while performing such functions as sealing, heat dissipation and oil control, there's no better option than Nippon rings. Perfect for standard rebuilds and lightly modified vehicles.

These Piston rings suit Nissan vehicles fitted with ZD30DDT ZD30DDTi 3.0L I4 engine.

Specifications:

• Top compression ring width: 2.5mm
• Second compression ring width: 2mm
• Oil ring width: 3mm
• Top ring material: Chrome

Contents:

• 1 X Piston ring set

Vehicle Fitment Guide

Parts Guide

Please select the part number you require from the drop down menu by utilising our vehicle fitment guide and parts guide.

Note: The image is for illustrative purposes only.