Engine noise - Grand Prix Net

You are not logged in. [Log In] Grand Prix Net » Forums » Older Models » 1997-2003 Grand Prix » Engine noise

Topic Options

Rate This Topic

#90809 - 10/11/07 09:54 PM

Engine noise

brown

Member

Registered: 07/16/06
Posts: 1382
Loc: Belleville, MI

I think someone asked about this a long time ago, but I couldnt find it in the search.

Lately when I'm accelerating I hear a high pitched noise, almost like a turbo spooling. Anyone have an idea of what it might be? It only makes the noise under acceleration, usually around 3,000 rmps. When I'm cruising, all is good. I also think my LIM gasket is bad. I heard a hissing noise when I'm accelerating as well.

Oh the joys of owning an 8 year old car.

_________________________

Top

#90810 - 10/11/07 10:16 PM

Re: Engine noise

lonezergling Offline

Member

Registered: 12/27/06
Posts: 2159
Loc: Waterford, WI

Sounds like an air leak, though that's somewhat obvious.

I'm guessing something along an intake leak too, due to it only being under acceleration.

Does it do it at idle? Can you tell? Is it all the time or after the car has warmed up?

Sounds a lot like my problem.

_________________________

http://s4.photobucket.com/albums/y130/venomman/
"If you are asking if you can do it, you can't. When you have learned enough to know that you can do it, you are able to." -me

Top

#90811 - 10/11/07 10:21 PM

Re: Engine noise

brown

Member

Registered: 07/16/06
Posts: 1382
Loc: Belleville, MI

Only happens under acceleration, never at idle that I can tell. It does it when the engine is cold, warm, or somewhere in between. The noise isnt extraordinarily loud. I can hear the noise in the car, but it doesnt sound (to me) like it would be something you could hear 1/2 mile away. Just loud enough to annoy me. Guy at work told me it sounded like a spun bearing, but to be honest I dont know what that means.

_________________________

Top

#90812 - 10/11/07 11:28 PM

Re: Engine noise

RooK

Member

Registered: 03/07/05
Posts: 5158
Loc: Southern KY

Check vacuum lines and intake for leaks. Something might have just worked loose.

_________________________
'13 Mustang 3.7V6 - MT82
'00 GP SE (L67 Swap, XP, Headers, 3.25")
'98 GTP, '01 Bonne

Top

#90813 - 10/12/07 12:56 AM

Re: Engine noise

Jon Szarka Offline

Member

Registered: 08/28/06
Posts: 272
Loc: Philly

I believe its the tensioner pully. Mine did the same thing and I thought it was the alt. but i soon realized after it poped and took my pwr steering res that I needed a new tensioner pully, and a pwr sterring pump, because the whole unit is cheeper than the res itself.

sounds just like you described...

_________________________
/\|^3/\//\
--------------------

Top

#90814 - 10/12/07 02:19 AM

Re: Engine noise

Chico

Member

Registered: 02/08/04
Posts: 3463
Loc: Gonzales Tx.

Tesioner pulley or alternator bearing are the most common sources for the desribed noise and FYI alternator bearings start to make noise usually before it craps out and the life span for the original seems to be around 100k and it's about the same for the tensioner pulleys.Chico(pops)

_________________________
04 GTO stock,04 Titan,97 GP GT too many mods to list,90 Corvette & project cars, http://photobucket.com/albums/v206/chico1319

Top

#90815 - 10/12/07 09:31 AM

Re: Engine noise

Member

Registered: 03/02/06
Posts: 1059
Loc: Brooklyn, NY

Turn around and go under the hood put your ear to the alternator and open the throttle alittle bit, then start savein for and alternator...Had the same problem and it a few weeks it seized and snaped by belt.

_________________________
---Ray Dawson---

1997 Grand Prix GT: ZZP SS M90 Kit--P&P Blower and LIM--3.8" Modular pulley--36# injectors--ZZP Wizair CAI--8.5mm MSD Wires--Autolite 103s@ .052--180* drilled T-stat--Tune Time Performance Tune--ZZP 2.5" D/P w/o Cat--ZZP Stage 1 HV TB--ZZP Power Log & Rear PEM--ZZP Poly Motor & Tranny Mounts--Flowmaster 40 Series Delta Flow Mufflers--Auto Meter Z Series Boost & Oil Pressure Gauges--Aeroforce Interceptor Scan Gauge

New York Metro Club Grand Prix
www.nymcgp.com

Top

#90816 - 10/12/07 11:49 AM

Re: Engine noise

ifitwasnt4u Offline

Member

Registered: 12/27/05
Posts: 2898
Loc: Phoenix, AZ

Quote:

Originally posted by D:
Turn around and go under the hood put your ear to the alternator and open the throttle alittle bit, then start savein for and alternator...Had the same problem and it a few weeks it seized and snaped by belt.

Wish mine did that..... My ALT started a small fire on it! Had a hellova time getting it off...

Witch reminds me, EVERYONE needs to keep a fire extingusher in their car!!!!

_________________________
-Mike H.

Top

Previous Topic

Index

Next Topic

Moderator: AustinGTP, Chew, HercMan(Rob), Marc Harbison, Redshift