Nissan Navara Problems

The last decade of dual-cab four-wheel-drive utes have emerged as the tow-vehicles of choice, and you see them everywhere filling roles exactly like the one you have planned. Popular models include the Ford Ranger you’ve nominated, Toyota HiLux, Mazda BT-50, VW Amarok, Mitsubishi Triton, Nissan Navara and Isuzu D-Max. But there are also cheaper alternatives including makes like the South-Korean made Ssangyong and various Chinese brands like LDV and Great Wall.

Just make sure you know exactly how much you need to tow before making a decision as some of the cheaper models don’t have the same outright towing capacity and even if they do, some of them don’t have the engine performance to make towing as easy as it should be. For parts availability, the Toyota would be king in really remote areas, but any of the major brands are pretty well covered in Australia.

Meantime, don’t rule out ute-based wagons such as the Ford Everest, Isuzu MU-X, Mitsubishi Pajero Sport and Toyota Fortuna. These offer better ride comfort when unladen thanks to more sophisticated rear suspensions and most have as much or almost as much towing capacity as their ute brethren.

You could be dealing with a broken or worn clutch that is not disengaging as it should. This would explain the notchy shifting. But the whining noise makes me think you could have a worn or dry throw-out bearing. This is part of the clutch that allows the clutch actuator to disengage the clutch while the engine is running. If it’s worn or it runs out of grease over time, it can start to make a shrill noise and can cause iffy shifting.

This is a very contentious question and depending on who you talk to, you’ll get a bunch of different answers. Overall, it seems that Navara D22s from about 2007 to 2010 did, in fact, have a DPF fitted as standard. But only if they had an automatic transmission; manual versions don’t seem to have been fitted with a DPF. Why? Who knows.

In any case, the definitive answer can be obtained by looking under your vehicle. The DPF will appear as a large cannister, mounted next to the chassis rail, just behind the transmission and is part of the exhaust system.

This is actually a pretty common problem and there seems to be two common causes. The first is leaking seals inside the turbocharger. The turbo needs oil to lubricate it, but if its seals are leaking they can allow oil into the inlet tract and, therefore, the intercooler.

The second cause is possibly even more common and involves the crankcase ventilation system allowing oil into the intake (and intercooler). A modern engine needs to consume its own crankcase fumes and burn them (rather than vent them into the atmosphere) as part of its anti-pollution systems. But in many cars (and modern turbo-diesels are the prime suspects) those fumes can contain some oil mist which, once enough of it has accumulated, will form the oil droplets you’re seeing in the intercooler.

While a faulty turbocharger will need to be replaced, if the problem is the work of the crankcase ventilation system, it still should be addressed before the oil mixes with soot from the exhaust gas recirculation system (another emissions-control device) and forms a horrible, back gunk that clogs the engine’s intake system. If hat happens, costly disassembly and cleaning is required.

Even if you’ve caught this in the early stages (before the gunk can build up) the oil can still cause problems with sensors inside the inlet system and could cause poor running and high fuel consumption. A good quality oil catch can is the preferred method of stopping this occurring as it 'catches' the oil mist before it gets to the inlet tract.

It sounds very much like your car has a problem with what’s called its clockspring. This is an electrical contact that allows the functions controlled by, or mounted on, the steering wheel to operate while still allowing the wheel to be turned. Over time, the clockspring wears and finally breaks which is almost certainly why you lost the cruise control and horn functions at the same time. It’s also why the airbag light has illuminated, as the broken connector won’t allow the computer to talk to the airbag in the steering wheel.

Most workshops will be able to replace the clockspring, but unless you’re a competent mechanic, leave it to the experts as anything to do with an airbag requires utmost care and respect. Even the experts will disconnect the car’s battery before tackling any airbag issue.

This sounds like a classic case of a hydraulic lifter (also called a lash adjuster) that is dying a slow death. These components rely on engine oil pressure to maintain the correct clearance between the engine valves and the rockers that actuate them, and any wear will show up as a ticking noise when the engine is first started and is still building oil pressure. They can often 'tick' for a few seconds or more before going quiet.

The recurrence of the noise has probably got something to do with a fall in oil pressure at idle when the engine warms up, allowing the lifter to start ticking again. But the engines in this series of Navara were also known for ticking or rattling noises as the result of worn camshaft-chain tensioners, broken or damaged cam bearing bolts and wear in the auxiliary pulleys and belt tensioners. If the noise does turn out to be a dud lifter, do the smart thing and replace them all, as wear in one means certain wear beginning in the others.

The towing limit on this model Navara varies enormously according to what engine and transmission is fitted. As a result, the Gross Combination Mass (GCM) also varies a lot between models. As such, the 2.4-litre petrol Navara has a GCM of 4230kg, the V6 petrol a GCM of 4850 and the turbo-diesel is much higher at 5920kg.

Don't forget, the GCM includes the vehicle, whatever it's towing and everything else on board, including fuel, accessories and even passengers.

You haven't given me much to go on with here, Noel. Without the year and specification of your Navara, I can't even guess if it was fitted with a DPF or not. That's because Nissan has had a bit of an on-again-off-again relationship with DPF technology. To the extent that in some versions of the Navara, the automatic variant had a DPF and the manual did not.

But you can check for yourself by taking a look under the car. A DPF looks a bit like a muffler, but with a couple of metal pipes coming out of it and usually an electrical connection or two. Some of this stuff may be hidden behind heat shields, however. In most cases the Navara's DPF will be located in the middle section of the exhaust system, roughly beneath the front passenger's seat.

Running over a piece of old fencing wire is not uncommon on farms and regional areas and, as you’ve discovered, it can do a lot of damage if it gets wrapped around a moving part. It sounds as though the inner CV joint is badly damaged and that’s allowing the axle to `float’ in and out of its proper position.

If you’re lucky, a replacement CV joint might be all that’s required. But a word of caution: Don’t attempt to drive the vehicle as it is. If the axle jumps ship from the differential completely, it can flail about under the vehicle, causing all sorts of expensive damage.

There are plenty of brands around in the aftermarket that claim to offer better performance and durability. Stick with a known brand and perhaps contact your local four-wheel-drive club or off-road specialist for specific brand advice. Somebody in the club is bound to have a Navara with an upgraded clutch.

The good news is that there are local manufacturers that can provide a heavy-duty clutch for your vehicle, so staying local is probably a good idea if there are any issues or questions down the track. Even better news is that for the NP300 Navara, Nissan switched from a dual-mass to a single-mass flywheel. This means you can fit a heavy-duty clutch kit without having to replace the flywheel itself, saving money. Don't forget to closely check the condition of the flywheel, however, as it may require machining for the new clutch to work properly.

Towing and off-roading place immense loads on a clutch, and this is a common upgrade for those who use their vehicles in this way.