Toyota’s 1HD-FTE has earned a reputation as one of the great Land Cruiser diesel engines. Found in the HDJ100 100 Series, the 4.2-litre turbo-diesel straight-six combines strong torque, relatively simple mechanicals and the sort of longevity that has seen plenty of examples rack up huge kilometres.
But a reputation for reliability doesn’t mean you can forget about servicing it.
If anything, keeping on top of the basics becomes increasingly important as these vehicles get older. Oil, air and fuel filtration are three simple areas where regular maintenance can go a long way towards keeping a 1HD-FTE healthy.
What filters are changed when servicing a 1HD-FTE?
For a routine engine service, there are three main filters to think about:
• Engine oil filter
• Engine air filter
• Diesel fuel filter
The oil filter removes contaminants circulating through the engine oil, while the air filter has the unenviable job of stopping dust and debris entering the engine through the intake.
That second job becomes particularly important for Land Cruisers used as intended. Gravel roads, dusty convoys, farms and off-road tracks can expose an air filter to considerably more contamination than ordinary sealed-road driving.
Then there’s the fuel filter.
Diesel fuel-system components rely on clean fuel, making effective filtration particularly important. Water or other contamination in the fuel system is something you want dealt with by the filtration system rather than allowing it further towards the injection equipment.
Does every HDJ100 use the same fuel-filter setup?
No, and this is where you need to pay attention when ordering a service kit.
Terrain Tamer lists two different filter kits for HDJ100 and HDJ101 applications.
The TFK18 is intended for vehicles without a secondary fuel filter, while the TFK18A is listed for vehicles equipped with both primary and secondary fuel filters.
That means you shouldn’t simply search for “100 Series filter kit” and order the first one you find.
Check what is actually fitted to your vehicle first.
It’s a small detail, but getting it right means you have everything required before starting the service rather than discovering halfway through that there’s another filter you haven’t ordered.
What is included in the Terrain Tamer TFK18 kit?
The Terrain Tamer TFK18 packages the regular service items together rather than requiring them to be ordered individually.
The kit includes:
• Air filter
• Oil filter
• Primary fuel filter
• Diesel conditioner
• Engine sump plug and washer
It is designed for HDJ100/HDJ101 4.2-litre turbo-diesel applications using the primary fuel filter setup.
For vehicles fitted with primary and secondary fuel filters, look instead at the TFK18A kit.
Why change the sump plug washer?
It’s probably the least exciting component in the box, but including a replacement sump plug washer makes sense.
The washer helps seal the sump plug against the oil pan. Reusing an old sealing washer repeatedly can increase the likelihood of an annoying oil seep from the drain plug.
It costs very little compared with the rest of the service, so replacing it while the oil is out is cheap insurance.
More importantly, having one included in the filter kit means you don’t need to remember to order it separately.
Don’t forget about the conditions your Land Cruiser operates in
Service intervals shouldn’t be considered in isolation from vehicle use.
A 100 Series that spends its life travelling relatively short distances on sealed roads has an easier life from a filtration perspective than one regularly travelling dusty gravel roads, towing, touring remotely or operating off-road.
Air-filter condition in particular is worth keeping an eye on if your Land Cruiser sees a lot of dust.
Likewise, fuel quality becomes increasingly important when travelling remotely and filling from a variety of sources.
The key is preventative maintenance. Filters are consumable service components. Engines and injection systems are considerably more expensive.
A good opportunity to inspect the rest of the engine bay
Servicing is also a good excuse to spend some time looking over an ageing 100 Series.
HDJ100s are now old enough that servicing shouldn’t simply involve dropping the oil and walking away.
Take the opportunity to inspect coolant and oil leaks, intake plumbing, belts, hoses and fluid levels. Look for anything rubbing, deteriorating or beginning to seep.
If you’ve owned the vehicle for years, changes are often gradual enough that they’re easy to miss. If you’ve recently bought a used HDJ100 without a comprehensive service history, establishing your own maintenance baseline is even more worthwhile.
The boring jobs are what keep old Land Cruisers alive
There’s no shortage of exciting things you can buy for a 100 Series.
Suspension, tyres, intercoolers, exhaust systems and engine upgrades are far more interesting than a box of filters.
But there’s a reason high-kilometre Land Cruisers keep accumulating kilometres. Regular preventative maintenance matters.
Keeping clean oil, clean air and clean diesel going through the 1HD-FTE isn’t glamorous, but it’s a far better approach than waiting until a neglected service item causes a much more expensive problem.
The Terrain Tamer TFK18 service filter kit for HDJ100/HDJ101 applications without a secondary fuel filter is available through Land Cruiser Hub.
Part number: TFK18
View the Terrain Tamer TFK18 HDJ100 Filter Kit at Land Cruiser Hub