![]() ![]() We’ve decided to run them lower than Toyo’s recommendations off-road pressures. The rear tyres cop an absolute pounding from the zillions of sharp rocks we encounter. But they’ve withstood horrendous punishment. We’ve done our best to spear razor-sharp rocks into the tread and cut the sidewalls with rocks and unbreakable mulga. They are Toyo Hyparadial M608Z tyres and haven’t even looked like letting us down yet. They lasted 70,000km and were looking a bit dodgy, considering rego was due.Ĭonsidering the absolute flogging these tyres cop, I’m not too concerned with the low mileage. We replaced four of the six tyres last year. ![]() As you can see, it was way overdue for replacement. It cops the hardest life due to toad camber. This is the rearmost bump stop rubber on the left hand side. We’ll have to replace these more often, now I’m aware of it. The two rearmost ones were in the worst shape. The rear helper spring bump stops are well and truly due for replacement.Īnd yes, they were worse than I first thought. After copping a pounding, they’re due to be replaced. So the rear helper springs are in service pretty much continually. We’re running pretty heavy, at just over 6.5 tonnes all up with 3.8 tonnes over the rear axle. It’s a shame Isuzu don’t use a metal bowl. Any more and it will likely warp or crack. The bowl just has to be lightly nipped up by hand. Apparently this is really easy (way too easy) to do. It turns out the mechanic had simply over-tightened the plastic final filter bowl and warped it. We had an issue after a service, where the truck was sucking air into the fuel system. The final filter (on the side of the motor) has a plastic housing. This screwed connection (just above the spring) keep working loose. We weren’t sure how long the new whip would last, as it oscillates like crazy when we’re going over corrugations. This was a simple fix with a dab of Loctite. The base of our GME UHF antenna worked loose due to corrugations, just above the spring. Isuzu are aware of the issue and simply replace the bolts with shoulderless bolts. They have a round shoulder which locate size-for-size into the holes in the hinge brackets. Unfortunately, you can’t adjust the doors in with the standard hinge bolts. ![]() These big mirrors flex the tops of the doors at speed and you getting a horrible drumming noise, especially in a crosswind. Australian Design Rules dictate that mirrors must be attached to the doors, rather than Isuzu’s original design of attaching them to the body. So I had to loosen everything back past the DPD and jiggle it around to get the old butterfly out and the new one in.Ī common complaint from Isuzu NPS 4×4 owners is the wind noise from the tops of the front doors. All the bolts on the exhaust pipe flanges are tack welded in place. Replacing the actuator/butterfly valve assembly was an “interesting” exercise. I think we accelerated the wear in the actuator with the continual corrugations and fine red dirt. The butterfly valve was fine, no wear at all. The exhaust brake diaphragm failed and the shaft was badly damaged. The internal diaphragm failed and the actuator shaft was badly worn. The exhaust brake basically wore out at 105,000km. There’s been couple of things outside of normal servicing. I also added an over-centre latch (top right) to take the load off the whaletail latches. A new whaletail latch fitted to the storage box. A whaletail latch on one of the storage boxes fell apart after one too many corrugations. Just one of the many rough roads our Isuzu has taken us along, without any dramas.
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