I didnt use my car for 7 days or so, and when i went to turn it on today, it made a really loud clicking noise. It sounded like it came from the pistons. The noise went away after i let it warm up for about 5 minutes, but it scared the %@%@ out of me when i first heard it. Does anyone know what that noise is and does anyone else who doesnt use their Z for a while get the same noise when they start their engine? I hope nothing is wrong..

 

Check your oil.

 

I agree with the big red guy. If a car sits for a while the oil drains down into the oil pan. When you start it up it may make more noise until the oil gets fully circulated.

 

So nothings wrong with it? I also hear something that sounds like the fuel line, but its coming from somewhere in the back. It sounds like a high pitch noise. Whats up with my car!!!

 

hehe, its the fuel pump you're hearing in the back & yes, its normal. Nissan didn't use much sound deafening materials when making this car.

Your car is fine

 

thank god! my car always makes weird noises and scares the crap out of me. Good to know that its normal (i guess?). Thanks for everyones help Now if only the orange peel issue was as easy......

 

I would guess you were hearing some very dry valves and lifters. Very thirsty. Your OK as long as you didnt try to rev it a bunch. Gravity works!

 

My Maxima used to do that if it sat for a week. It was a lack of oil in the cylinder head giving a little bit of valvetrain noise for a few seconds until oil pressure stayed up. Once I switched to Mobil 1 synthetic it never did it again.