GQ 4.2 Diesel engine noise

Peter,
Tappets is one job I don't feel confident to tackle....but I seem to recall reading that they are supposed to be adjusted when the engine is hot.....so that may be the cause of the problem...

Good luck

BTW: all the 4.2's rattle when cold AFAIK.

What brand of oil filters are you using?

There are some that have no drain back valve in them, which holds oil in the filter when you shut it down. You should use either Nissan ones ($12.00) or Fleetguard ones.. both have drainback valves.

Gday Peter,

Had a gQ TD42 with Schwietzer turbo running 12psi for 3 years. I noticed at cold startup the clacking and the tapping for about 10 seconds before oil pressure rose. Spoke to my turbo guy first then Nissan. That's the sounds of a TD42 motor run in, apparently no damage caused, only if you start then drive off straight away with giving a chance to lube up. I always leave my trucks for about a minute before driving and 5 minutes whilst driving before reving up to 2 1/2 thou rmp and above.

Cheers mate,

Chris.

My surf tends to do this on very cold mornings (very cold in perth is only about 3 degrees C) LOL
It's only for a second as it starts to kick over, I have put it down to either pre ignition because of the EFI giving it some kind of choke or the oil being a 15w-40 not really designed for the colder weather and perhaps being a little thick on startup.
Not really bothered about it to be perfectly honest.

Another Patrol problem...what a suprise...

Woof.