I have a 2008 Toyota Hilux 3.0L D4D RWD with kun16 engine.
For the last week or so I have been getting a strange tick or rattling sound. It comes on kind of randomly, but seems to be triggered worst by driving up hills and slowing down.
It can be as little as one tick or a constant rattle for about 5 seconds. Sometimes it will come on and off several times a minute but most of the time I can go 30-60 minutes driving without hearing it at all.
The sound does not change with rpm and if you stop the car when you hear it it might continue to tick occasionally for 10-60 seconds. Also I can idle the car for 30 minutes straight and never hear it.
Sound seems to be at its loudest on the driver's side and has a metallic or plastic tone to it.
Hoping someone out there has a clue because I don't, thanks from NZ.