4.8 GRX Clucking Sound from ENGINE when cold

[NISMOnator]

Hello Almal,

When booting up our 4.8 GRX, sorry I mean starting our Patrol in the morning there is a very loud CLUCKING sound coming from the engine bay and goes away as the engine heats up. Not very long but definitely doesnt sound good.

Any ideas?

Thanks

[IanT]

Rockers and Lifters??? have you checked that the oil is toped up?

[NISMOnator]

Ian,

I will check that, but this only happens when the vehicle is really cold!

Maybe the oil is frozen inside?

[IanT]

Old Oil/Wronge Oil x Cold Temps = Thick Oil !!! Had it on my old 3L skyline summer hardly made a noise but winter it sounded like a bucket of bolts until it warmed up

[NISMOnator]

Interesting, ok that is something to look into, but it gets serviced every year by Graham and I dont believe it to be old oil.

The car doesnt do many km as well. Maybe 10 000 a year if so many.

[Mamba]

Hi, Can I come past Saturday morning at 8.

Maybe I can help?

[NISMOnator]

Reg so MAMBA,

Dankie. Het jy al soorgelyke iets gehad?

[marakasmalan]

When I start mine on a cold winters morning (actually, any time any season), the geology and seismic dudes from tukkies phones and tunes me according to their richter-scale gizmos I'm sitting at the epicentre of a nasty earthquake...

[Chris Skinner]

Check for ducks in the engine bay!!



Any chance its the fan belts? - mine make quite a bit of noise and have not found a good way to make this go away yet!!

[Tinus lotz]

Are you sure its not the aircon clutch going in or out????