Need help with a weird noise! - 3000GT/Stealth International Message Center

Lurch4 · 05-18-2008, 08:51 PM

I have a 91' 3GT SL with auto trans, and for the past couple weeks I have noticed somewhat of a grinding noise (Sounds like rubbing 2 metal discs together)

.

The noise occurs very briefly just after I start the engine(spit second after). I only notice this on cold starts.
The noise ALSO occurs just after I start to take off from a stop(it occurs a little louder in this situation).. this seems to be worse when i'm turning at the same time and also it goes away after is been drove for a while (like 20 min. or so).

Now from what i know, the starter would explain when the engine starts, and the CV boots would explain the other noise situation when taking off.
Any ideas???

I'm just wanting to get to the bottom of this noise cuz it is driving me crazy. So any help you guys can give me would be greatly appreciated!

bjmsam · 05-18-2008, 10:24 PM

Quote:

Originally Posted by Lurch4

Sounds like rubbing 2 metal discs together

If turning the A/C on eliminates the noise, then the A/C compressor clutch may need to be reshimed or replaced.

Lurch4 · 05-18-2008, 10:38 PM

Quote:

Originally Posted by bjmsam

If turning the A/C on eliminates the noise, then the A/C compressor clutch may need to be reshimed or replaced.

Ok, well i am at work all night but i will def. try that tomorrow morning when i get off..

ramnakhle · 05-19-2008, 01:55 AM

Can't help but suspect the accessory belts (AC/PS) check them for tension & wear... I don't know that's what i got from your description... If all else fails post a video with the sound...

best of luck

Lurch4 · 05-19-2008, 02:40 AM

Quote:

Originally Posted by ramnakhle

Can't help but suspect the accessory belts (AC/PS) check them for tension & wear... I don't know that's what i got from your description... If all else fails post a video with the sound...

best of luck

Well i checked them for tension and wear yesterday and everything checked out ok that I could see. they're nice and snug with no noticable wear on them

and somewhat of an update.. the grinding noise is related to rpm. noise occurs when i am in gear and give it a just a little gas.

Could this possibly be a pulley vibration?

Lurch4 · 05-19-2008, 05:29 AM

bump..

TwIzTeD_3kGt · 05-19-2008, 05:57 AM

If you could get a sound/video clip of it we would have a lot better chance of telling you what it is.

It does sound like a drive belt though.

ramnakhle · 05-19-2008, 02:04 PM

Here's a little trick i tried once and it worked:
It's gonna sound weird but it worked for me; It's up to you if you wanna try it.

Do a cold start, and while the noise is audible, poor some clean water onto your serpentine belts. If they're the culprits, the noise should stop completely, and immediately, but only for a short while as the wetting allows the belts to find some grip on the pulleys (like when you wet your finger tips to flip a slippery page in a book).

Make sure you don't go hosing down your engine bay when you do this, a few milliliters will do just fine, as long as it creates a thin film of water on the surface of the belts in contact with the pulleys.

From your description, i'm leaning towards the power steering belt.

Anyways, hope this helps, If the water does nothing, i don't know what else it may be... maybe a pulley like you said...

cheers

Lurch4 · 05-19-2008, 09:39 PM

Quote:

Originally Posted by ramnakhle

Here's a little trick i tried once and it worked:
It's gonna sound weird but it worked for me; It's up to you if you wanna try it.

Do a cold start, and while the noise is audible, poor some clean water onto your serpentine belts. If they're the culprits, the noise should stop completely, and immediately, but only for a short while as the wetting allows the belts to find some grip on the pulleys (like when you wet your finger tips to flip a slippery page in a book).

Make sure you don't go hosing down your engine bay when you do this, a few milliliters will do just fine, as long as it creates a thin film of water on the surface of the belts in contact with the pulleys.

From your description, i'm leaning towards the power steering belt.

Anyways, hope this helps, If the water does nothing, i don't know what else it may be... maybe a pulley like you said...

cheers

ok thanx for the interesting tip! The only problem with that is the noise only occurs for a split second after i start her.

and as for the video/audio, if i do that, it'll take be probably a day or so to get a hold of a camera to use (from a friend). So Wednesday night, ill maybe get a video posted for help.

gltasn · 05-19-2008, 10:58 PM

motor mounts comming apart? mine made a weird squeak when it was bad. j sin

05-18-2008, 08:51 PM	#1 (permalink)
Lurch4 New User - Please be kind Join Date: May 2008 Location: Indiana Drives: 1991 3kGT SL Trader Rating: (0)	Need help with a weird noise! I have a 91' 3GT SL with auto trans, and for the past couple weeks I have noticed somewhat of a grinding noise (Sounds like rubbing 2 metal discs together) . The noise occurs very briefly just after I start the engine(spit second after). I only notice this on cold starts. The noise ALSO occurs just after I start to take off from a stop(it occurs a little louder in this situation).. this seems to be worse when i'm turning at the same time and also it goes away after is been drove for a while (like 20 min. or so). Now from what i know, the starter would explain when the engine starts, and the CV boots would explain the other noise situation when taking off. Any ideas??? I'm just wanting to get to the bottom of this noise cuz it is driving me crazy. So any help you guys can give me would be greatly appreciated!

05-19-2008, 01:55 AM	#4 (permalink)
ramnakhle EVO Terminator Join Date: Jan 2008 Location: Beirut, Lebanon Drives: '97 3000GT VR-4 Trader Rating: (0)	Re: Need help with a weird noise! Can't help but suspect the accessory belts (AC/PS) check them for tension & wear... I don't know that's what i got from your description... If all else fails post a video with the sound... best of luck __________________ Where's the 3K ????

05-19-2008, 05:29 AM	#6 (permalink)
Lurch4 New User - Please be kind Join Date: May 2008 Location: Indiana Drives: 1991 3kGT SL Trader Rating: (0)	Re: Need help with a weird noise! bump.. Last edited by Lurch4 : 05-19-2008 at 05:48 AM.

05-19-2008, 05:57 AM	#7 (permalink)
TwIzTeD_3kGt 2 + 2 is CHICKEN! Join Date: Oct 2005 Location: Rochester, NY Drives: 1997 VR4 / 1994 SL Trader Rating: (11)	Re: Need help with a weird noise! If you could get a sound/video clip of it we would have a lot better chance of telling you what it is. It does sound like a drive belt though. __________________ Pictures & Videos

05-19-2008, 02:04 PM	#8 (permalink)
ramnakhle EVO Terminator Join Date: Jan 2008 Location: Beirut, Lebanon Drives: '97 3000GT VR-4 Trader Rating: (0)	Re: Need help with a weird noise! Here's a little trick i tried once and it worked: It's gonna sound weird but it worked for me; It's up to you if you wanna try it. Do a cold start, and while the noise is audible, poor some clean water onto your serpentine belts. If they're the culprits, the noise should stop completely, and immediately, but only for a short while as the wetting allows the belts to find some grip on the pulleys (like when you wet your finger tips to flip a slippery page in a book). Make sure you don't go hosing down your engine bay when you do this, a few milliliters will do just fine, as long as it creates a thin film of water on the surface of the belts in contact with the pulleys. From your description, i'm leaning towards the power steering belt. Anyways, hope this helps, If the water does nothing, i don't know what else it may be... maybe a pulley like you said... cheers

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05-19-2008, 10:58 PM	#10 (permalink)
gltasn j sin Join Date: Apr 2008 Location: alaska, anchorage Drives: 95 mitz 3kgt vr4 Trader Rating: (0)	Re: Need help with a weird noise! motor mounts comming apart? mine made a weird squeak when it was bad. j sin __________________ "If I was as slow as you, they'ed bury me!" terry canfield(dad)