I have just bought a 56 navara d40,When the engine is under load there is a tappet type sound from the engine which goes when you lift your foot off, its not all that bad some days i think its normal other days i wonder if threre is a problem are they all the dci's like this ? i would be gratefull for some advise.

Injector rattle matey, commom on the D40 Navara, most live with it, some get it sorted under warrenty, but very costly job if nav is out of warrenty.....

thanks, i can live with it as long as it wont damage the engine i had visions of hydraulic tappets small ends or even big ends,is the solution new injectors ?

click on this link and try the ECU and fuel pump reset, it has been known to reduse the noise or even stop it. viewtopic.php?f=15&t=5786

if not the only way to stop it is new injectors, but theres nothing to stop the noise coming back a few thousand miles down the line as they will just fit like for like injectors........

thanks i have done that i will see how it goes , i also have a half decent generic code reader and no fault codes came up . i just feel alot hapier its not the engine on the way out as i know the d22's had lots of big engine problems !!!!

When you do the reset go for a drive so everything relearns! D40s have solid engines matey!

back again, thanks for the help i have reset the ecu twice once before a 50 mile drive it has not made any diference, i have read other peoples injector rattle problems and they seem to be at certain revs periodicly my noise is constant but goes at the top end of rev range, its not a harsh metalic sound just like there is a tapet out, i wonder if i am being to fussy as i used to have l200 d-id wish i still had it.

ive had my nav a couple of monthes and am so diasapointed in the noise when cold its realy loud and noticable love the truck but the noise is puting me to the point of selling it.

Warning! Do not ignore those noises! Usually the injector causing it and that means the engine is running with incorrect combustion. In diesel engines piston damage will occur because of that.

Hi, reading through these posts. Mine is noisy at start up if the weather is below about 5C. The noise soon goes after 5mins when the engine has reached operating temp. In all my experience with farm diesels its just a typical cold diesel knocking. Just be sensible and dont thrash the nuts out of the engine until warm. I'm no mechanic so please feel free to put me right on my theory!