Just bought an 03 track 57k and in the mornings when I crank the car there is a brief rattle or knock comin from the engine till the it builds oil pressure. Should I be worried? It lasts at the most 2 seconds. As longs as the car is warm it doesnt do it. I tried search and no results. Thanks

 

Try using a light weight oil an see what happens.

 

^^^ +1 try a lighter oil like a 5w30. If it still lags in building oil pressure, you may need a new oil pump or a good engine flush... And Yeah, I'd be very worried about that condition either way.

 

Nothing to worry about. The timing chain runs off a hydraulic tensioner that is oil pressure based. For a second or two you might hear the chain contact the timing chain case until oil pressure comes up. My 01 Maxima did it and my 04 G35 did it.

 

could be lifter tick

 

So you wouldn't be concerned about no oil pressure for the first few seconds after start up?

 

Nissan Motorsports oil pump off an RB26 ftw

 

It takes minimal time to build pressure. I was just worried about the knock.

 

Unless you have a priming pump to give oil pressure before start up, it's something you have to live with on the DE motor.

 

my 04 did this with 34000 miles on it, my 03 does it, my 300zxtt did it also. seems to me its normal in nissan engines. i have heard it in a couple of z31's also right at start then gone.

 

no worries... mine does the exact thing sometimes when not driven for a couple of days or so.