1HDTFE Injector Lifespan?

Hi
Injectors and pumps should always be checked thru out there lives . Service history becomes very important . Direct injection injectors wear out due to the high pressures. This causes poor atomisation, irregular spray pattern and differing amounts of fuel.
I would check fuel pump at any time front engine work takes place eg 200,000km .
Injectors every 100,000km

Not a Toyota but my Ranger diesel had injectors at 70,000km and a new one was faulty
Injector pump was checked as well. prior to repairs vehicle was getting 300km to a tank.

I own a D4D Hilux 2011 the injectors are as noisey as hell = poor quality and typical
Basically DID or old school pumps and injectors need checking .
I change fuel filters every 10,000--15,000km . Suprisingly the filter paper is very black for the low km.

Jock
Purely for reliability and fuel economy at 300,000 the injectors should be checked/replaced. It all depends on how many cold starts in 300,000km as to the life of the injector nozzles and filtration. Yours can't be compared to CRD diesels like Hilux or Ranger as it isn't the same. A mate of mine has a 100 series with 1HDfte engine and it has done well over 200,000km with no perceptible change to performance or economy. Mostly does 3 ton van towing, so longer hot distances usually/most of it's life.

Yes filtration is important, but black in a filter is staining from microscopic bituminous particles in the fuel going through it. Always will do that, more with some diesel fuels than others. Don't ask me which ones though. Some black can be algae growth present in tank and passing to filter. Always use a bug killer periodically to treat the fuel/tank/system.

I agree with the above - it is also due for new injector lines ! You will be amazed at the difference that a good pump rebuild and rebuilt injectors make - not cheap will be about $1500 for the injectors and $2500 for the pump!
Worth it against depreciation of a new car - you will also be blown away by the value of your 79!

Thanks for the replies, I more than mechanically minded so understand the ins and outs. I was just interested to know, from those with experience of these motors, how many kms have you seen on these fuel systems?

I'm the second owner and I know the previous owner racked up most of his kms towing across the Nullabor, 80% of my work is similar - long hot runs. At this point in time I'm struggling to justify in excess of $5000 ($1500 injectors, $2900 pump plus other consumables) for a motor that is running perfectly fine. Though the old 5 P rule comes in to play there too

I replaced injector lines last service so all good there. I was reading the service manual the other day and interestingly the book states it's only the HDJ100 that has the 150,000km interval on injector lines

Hi
All injectors and pumps need service thru out there lives ,no exceptions . No difference between DID or old school . Pumps and injectors still wear out and deliver the wrong amount and poor quality spray patterns .
When there in for service the pumps and injectors are bench tested first . Many occasions some donot require o/haul ,some do .
If u want a huge amount of miles from your diesel ,its what you do .

My 2002 4.2 factory turbo 100 series manual had 455000 klm when i sold it last november...still had original injectors that had never been serviced in any way .

Car was performing as well as ever , mainly used for towing 3 tonne van around australia..didnt blow smoke of any kind.

Hi
for maximum reliability economy power and throttle response injectors and pump should be checked .
Offroad equipment is done to get maximum reliability ..simples . No service schedule was done because there mates talked to there mates at the pub who new a fella who had one .
Parts failure with these items occurs slowly . Only noticeable when driving when the parts are stuffed Pick up it up early and all is well .

Hi Jock H,

Have you been on the LCOOL website? If you do not know about it, it is the Landcruisers Owners On Line. There are various sections for specific Landcruiser series. You may find the answers you are looking for on there.

Macca.

Keep your eye on economy and smoke, when these change, start thinking about injecters

I have a 2005 model. Had it from new S/C ute 240000 k only had regular service will consistently get 730 - 750 k on one tank of fuel 83-85 ltrs just running around town light.

Hi Jock,

If you decide to give her the birthday treatment , I would also get the valve shims checked and adjusted, Very important with those engines, the big worry is getting someone that knows what their doing ,not always found at dealerships!


Cheers Axle.