Prado 120 Injectors

There are two modes of major failure.

First is the injectors themselves in the early D4D engines. If they drift out of spec they can grossly overfuel, causing cracked pistons etc. Not all engines are affected, but in those that are the result is pretty much catastrophic. There are replacement injectors available that address the problem.

You can monitor this by asking for injector feedback values at every service. The limits for the feedback values are plus or minus 2.5.

Second is the metal sealing washer under the injector. This affects all 120 Series and some 150 Series. The injectors are in the rocker box. In some cases the original washers would leak and allow combustion gases to blow by into the rocker area. This would carbonise some oil, carbon granules would get washed down to the sump where they would be caught in the oil pump pick-up screen. If this remains undetected the screen will block completely and the engine will fail. There are replacement sealing washers that fix the problem.

If you're a DIY person you can monitor this by inspecting the pick-up screen through the sump drain at every oil change.

My injectors were replaced at 60,000 under warranty - dealer picked up the problem, bless him. But I worry about the washers underneath - that problem hadn't reared its head when the injectors were replaced, so they are probably the potentially leaky ones. Oil pick-up is clean though. 170,000km and researching :-)

Cheers

Baileys Diesel Service
Lots of good reading on the Baileys' site.

Toyota have had a recall for them in the rest of the world ,we dont have the problem in Australia according to Toyota ?????

It would appear Toyota Australia are hoping the majority of failures will occur outside of the warranty period. If they fail before they will try to blame poor quality fuel, only choice then is to take them to small claims court which I believe a few have done, but as you don't hear anything after they go to court I assume (maybe wrongly) that Toyota agree to an out of court settlement with a non disclosure clause?

Any complaints regarding the Prado injectors should be forwarded to the following address. They are supposed to be looking into the matter and hopefully if they get enough complaints something will get done and Toyota will have to take action in Australia.


Investigations Officer

Policy, Legislation and Projects | Vehicle Safety Standards

Department of Infrastructure and Regional Development

GPO Box 594, Canberra ACT 2601

P: 02 6274 6274

E: vinvestigations@infrastructure.gov.au

Thanks for this information, I will certainly do this