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#1
11-27-2004, 10:31 AM
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Loud noise coming from center of my engine
Hey guys, I started my Z up this morning 1990 N/A auto and found a lound noise coming from the center of the top of the motor.. I cant hear the sound from inside the car and power seems to be ok.. As I rev it up it just gets louder and louder. It sounds bad.. Like a rod flying around.. Power is still good though.. Any ideas?? Thanks
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#2
11-27-2004, 10:51 AM
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Re: Loud noise coming from center of my engine
UPDATE: Sound seems to go away after warm up.. I have been getting changing oil pressure readings lately and thought it was just the guage.. Do you guys think the oil pump might be going and it is taking awhile to reach all the engine parts before warming up??
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#3
11-27-2004, 12:17 PM
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well my mom had a car that the water pump was goin out init and it made a real loud noise that would only get louder when u rev it up, so maybe you can check that
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#4
11-27-2004, 01:18 PM
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Re: Loud noise coming from center of my engine
Was it a ticking noise?
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#5
11-27-2004, 01:51 PM
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Re: Loud noise coming from center of my engine
if it is a knocking noise and your oil pressure is going all over the place (especially low pressure), than you could probably have a spun bearing. when a bearing spins, the connecting rod will move on the crankshaft, causing a knocking noise. but then again, it could be something else, having a knocking noise can be a lot of different things. i would also check your oil, having too much or too little can cause a ticking noise.
-Jared
__________________
  ZedEx Crew Member #2
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#6
11-28-2004, 12:22 AM
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could also be a gasket...i had a blown exhaust gasket once, it made a real bad ticking sound. but that wouldnt be in the center of the engine.
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ZedEx Crew Member #4
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#7
11-28-2004, 01:08 AM
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Re: Loud noise coming from center of my engine
You've got the '90 curse bro... Sorry to tell you.
Sounds like the valvetrain to me. Make sure you start taking extra care of the engine, oil changes as often as possible, TIMING BELT, belts, etc etc. Just be careful with her... -Wes
__________________
-2000 PY Acura Integra Type-R #686 - WhoRe -1997 EGP Honda Prelude Type-SH - Daily driver R.I.P Hypsi87:Andy Filson 
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#8
11-28-2004, 08:08 AM
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Re: Loud noise coming from center of my engine
Nooo! Not the '90! Meh....try taking the plenum off and see if you can see anything wrong.
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#9
11-28-2004, 06:44 PM
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Re: Loud noise coming from center of my engine
Bummer man, I just got this gemstone.. I may need to buy a TT front clip and put that in.. The noise is very loud until I drive it a block or two, def not a ticking sound.
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#10
11-28-2004, 06:57 PM
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If its a mechanical knocking sound that goes away after the car runs for a while...I would think it would be an oil pressure problem somewhere. If it had spun a bearing it would be loud as hell and running rougher than ground turkey nuts.
May want to check the pressure readings on the outflow side of the oil pump.
__________________
1989 240SX Fastback. . . . . . . . . . . . . . . . . . . . . . . . . . . 1995 300ZX Twin Turbo  Warning: Objects in mirror aren't as fast as they thought they were.
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#11
11-28-2004, 07:04 PM
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Re: Loud noise coming from center of my engine
Thanks Broke, I feel like it must be an oil pressure prob. as well. I will check it this week.
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