strange scary noise coming from my motor, help.

**02ultraZ** · 08-06-2007, 08:15 AM

Ok i have an '02 Z with 30k on it. It does have the piston slap. There is a new noise that has only happened twice but it sounds horrible. Each time i drove my car like 40 miles, then it sat and cooled for like 6 hours or so. It was still like 80 degrees out so it's not like it was that cold. But when i fired it up there was a whine coming from the motor. I know it was the motor. But the first time it did it I thought i was the throw out bearing for the clutch but only because of the initial sound. I was playing with the clutch and it didn't change the sound so i know it wasn't that. The sound sped up so to speak when i gave it gas. I really have no idea what the hell it is, it went away once it warmed up. Help me out guys i don't have a clue. I put 10-30w in the car perhaps the wrong oil if i have the piston slap?

**2001NBMZ28** · 08-06-2007, 08:47 AM

First thing that comes into my mind is the air pump, especially if it only happens on start up. Do a cold start and pull the AIR PUMP fuse under the hood while it's making noise and see if it stops. It'll throw a code but SES will go back off after a couple cold starts and replacing the fuse. Could also be an accessory. My car has piston slap and I run 10W-30.

**02ultraZ** · 08-06-2007, 09:11 AM

Originally Posted by 2001NBMZ28

First thing that comes into my mind is the air pump, especially if it only happens on start up. Do a cold start and pull the AIR PUMP fuse under the hood while it's making noise and see if it stops. It'll throw a code but SES will go back off after a couple cold starts and replacing the fuse. Could also be an accessory. My car has piston slap and I run 10W-30.

Thanks for the idea i will try this tonight...

**b.lee** · 08-06-2007, 09:57 AM

try turning the wheel to see if it gets worse.
I was thinking power steering pump / fluid level

**Kjz99z28** · 08-06-2007, 10:00 AM

Originally Posted by 2001NBMZ28

First thing that comes into my mind is the air pump, especially if it only happens on start up. Do a cold start and pull the AIR PUMP fuse under the hood while it's making noise and see if it stops. It'll throw a code but SES will go back off after a couple cold starts and replacing the fuse. Could also be an accessory. My car has piston slap and I run 10W-30.

Those things can make some noise

**02ultraZ** · 08-06-2007, 10:46 AM

Originally Posted by b.lee

try turning the wheel to see if it gets worse.
I was thinking power steering pump / fluid level

I know it wasn't the power steering pump, i know that sound.

**02ultraZ** · 08-06-2007, 10:47 AM

Originally Posted by Kjz99z28

Those things can make some noise

This noise changed with engine RPM's too so im not sure if it's the air pump but i will pull the fuse...

**2001NBMZ28** · 08-06-2007, 11:21 AM

Yeah, saw that in your orig post - thought it might just be increased voltage to the pump. If nothing else, pulling the fuse will eliminate the pump as the problem and won't hurt anything.

**02ultraZ** · 08-06-2007, 12:31 PM

Originally Posted by 2001NBMZ28

Yeah, saw that in your orig post - thought it might just be increased voltage to the pump. If nothing else, pulling the fuse will eliminate the pump as the problem and won't hurt anything.

Yea i didn't rule out the airpump yet because i don't know, but i was talking about the power steering whining is def. ruled out.