1HZ turbo issues

[Tiny]

Hi All,

A mate of mine with a 98 100 series with a 1HZ fitted with a turbo by a certain company just south of Sydney (who also offer B&B) has had some issues.

basically when the turbo was fitted back when the engine had 2000km on the clock (ODO now 156000Km) the fuel pump was set wrong and was ovre fuelling. At 100000Km he took it to west end for some work and the found this problem and rectified. now at 156000Km the streses cuesed have finally caused the engine to die the result is number 6 piston has a largecrack and all the other pistons have signs of hairline cracks.

The overfueling problem would have been picked up had an EGT (exaust temp gauge) been fitted.

This is apparently not an uncomment prob with the co in question.

In addition any vehicle full stop with aftermarket turbos fitted or increased boost turbos shopud have an egt fitted and have a turbo service frequently as apparently the fuel pump can begin to over fuel over times.

[slowhilux]

Did it have a boost compensater fitted to the pump?? What boost pressure was it running?? I have heard of a few 100 series 1HZ's dying after the fitment of turbo kit. Was it overfueling at low rpm, low boost??

Phill

[Tiny]

Did it have a boost compensater fitted to the pump?? What boost pressure was it running?? I have heard of a few 100 series 1HZ's dying after the fitment of turbo kit. Was it overfueling at low rpm, low boost??

Phill

Not sure champ, but presumabley when you take a rig to a respectable company for fitmant of an expensive performance mod that they will fit all necesary safety gear to it.

[Punchy]

Shame to see you have experienced the issues involved Tiny.

The later 1hz units became an issue for some reason with toyota and thusly companys like "Motsons" (IMHO a reputable 4x4 turbo installation company in Southe est queensland) went to town on toyota with a legal issue that had arisen withthe fitment of aftermarket turbos. I was told of this situation when i went for a work position at his company.

Toyota released a new vehicles owners press warning (sent in the mail to registered owners), stating to owners of 98 -> onwards 100 series landcruisers that fitment of all and any aftermarket turbos to the vehicles would Void ALL warranty on the engine and drive line.

This became a direct threat to his company. Tony then pressed ahead with some technical proceedings stating that if done correctly and with concervative boosts that the modification can be done succesfuly.

toyotas rebuttle was that the later engine do not have the bracing to support the extra boost in the rear of the block g/box flange and the deck of the engine. (the block would torque up and twist.)

In conjunction with this the aspirated piston was not up to the task.


If perhaps this information had been avaliable to your friend prior to fittment of the turbo i would assume that the fittment would not have taken place.

I would assume in your case that all boost pressures were kept under 5 PSI and that the fuel setting, set over rich to keep the engine wet and to reduce valve/valve seat deterioration.


In short its a gamble what ever you do at the end of the day with any modification. Like any perfomance mod fittment of boost adding device requires additional engine modifications EG: fittement of decompressed pistons and turbo rods would have been the "correct" thing to minimise any problems at the very least like a petrol engine.

With the degredation of the diesel fuel with low sulpher base, it only stands to reason that the goal posts are changing in this game and we have to accept these changes and accomadate them or we will end up with more tradgeys like your own.

Best of luck next time and might be better he look for a multivalve diesel if he's looking for power.