Strange chirp sound. Now with a video. FINALLY FIXED! - Page 5 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-26-2008, 07:04 PM   #41
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FYI, I brought a manual to work with me today with the intent of looking it up for you, but haven't had the time yet.
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Old 03-26-2008, 07:34 PM   #42
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Quote:
Originally Posted by willwren
FYI, I brought a manual to work with me today with the intent of looking it up for you, but haven't had the time yet.
Thanks. Let me know if you find the specs. much apprciated
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Old 03-26-2008, 07:55 PM   #43
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Is there anyway to disassemble and lube the bearings on any of the pulleys along the drive bely such as the water pump and air conditioner compressor? It would be nice to quiet this stuff down a bit. I'm sure they're all sealed but if there is a way it would be nice.

here is a link to the video of my loud engine compartment minus the squeal/chirping that won't happen when it'* warm outside.


http://www.youtube.com/watch?v=gwy6mWkiBF8
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Old 03-26-2008, 08:02 PM   #44
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Please edit your previous reply instead of replying to yourself.

All the bearings on the path are sealed. Some of the idlers can be lubricated using a syringe and needle with very light oil, but it'* simply not worth it. It'* best to identify the culprit and simply replace it.

Belt and pulley issues can be very difficult to diagnose. I actually used a laser to check all the pulleys on one member'* car in the past when we couldn't find the cause of belts shredding. Subtle movements can do weird things. Good news is that it'll get more annoying (and easier to find) before it utterly fails.
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Old 03-27-2008, 04:32 PM   #45
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OK, I finally have video of what it'* doing. I'll try my best to explain what is going on in the video. The parking lot has a road and then parking spaces on both sides. The parking spot on the side where the car is parked is level or maybe a very slight incline with the front end facing uphill. That'* when the camera shows the engine running and it sounds normal. Then I take the camera and get into the car and back it across to the other side where there is an incline and the front of the car is facing downhill. If you listen carefully you can hear (the only thing you see while I'm moving the car is the white sky) the chirping start. Then i put it in park and you can hear the chirping. I moved the camera to all the different areas of the engine bay to show that the noise seems to be coming from the front of the engine area and that is where it is loudest. Now, this is the sound it makes when I hit the brakes and when it comes down to about 1000 rpms or if I turn right it does it also. Once I stop the car, if it is sitting with the front facing downhill it continues to do this while sitting in park but as soon as I get in and put it into drive and take off it quits and doesn't do it again until the brakes at 1000 rpm or turning right like explained above. Doesn't do it any other time. You will notice in the video that i got back into the car and moved the car back to the level parking spot and got out with the camera and the sound stopped. Also, like I said in a previous post when it gets warmer outside it doesn't do this at all. It was 50+ degrees yesterday and I couldn't get it to make this noise. Today it'* back into the 30'* and doing the noise again. Maybe it'* the bearings in the cooling fans? But why does the brakes, turning right, sitting facing downhill or cooler weather cause this to happen. I'm completely stumped. Video link right here,

http://www.youtube.com/watch?v=dLtgwJWZTTE
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Old 03-27-2008, 05:19 PM   #46
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Quote:
Originally Posted by rstrunk
Also, when I shut of the car after it is warmed up, it makes a sound for a minute or so that I would relate to a bird chirping. haha
Hmmmm... that was March 16 ...just a reminder ... f this is what you meant to say, it should either eliminate a lot of things (motor, belts, tranny), since it has done it without the motor running (?) or tell us that you have more than one source of noise(*). A cheap stethoscope from Autozone might work wonders in pinpointing.

Sorry, but the video sound can be deceiving because your camera probably has automatic volume control which makes it hard to tell where it is the loudest on the recording.
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Old 03-27-2008, 06:20 PM   #47
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Quote:
Originally Posted by 93RedSled-SSE
Quote:
Originally Posted by rstrunk
Also, when I shut of the car after it is warmed up, it makes a sound for a minute or so that I would relate to a bird chirping. haha
Hmmmm... that was March 16 ...just a reminder ... f this is what you meant to say, it should either eliminate a lot of things (motor, belts, tranny), since it has done it without the motor running (?) or tell us that you have more than one source of noise(*). A cheap stethoscope from Autozone might work wonders in pinpointing.

Sorry, but the video sound can be deceiving because your camera probably has automatic volume control which makes it hard to tell where it is the loudest on the recording.
The sound it sometimes makes after shutting it off is very different. More like air escaping from somewhere. It just makes like one chirp every 5 seconds or so for about 15 seconds maybe.

I will tell you where the noise seems loudest if it helps. The part where I focused the camera on the most right above cooling fan on the drivers side. That is where the noise is most prominent and that'* why i focused the camera in that area so much.

Like I said, I'm totally lost. I was going to go out shortly after I posted the video and get it to make the noise again and then unplug the cooling fans (via the fuse, I guess) to see if that may be the source but it started to pour down rain and hasn't quit since so I haven't been able to do that yet.
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Old 03-27-2008, 08:24 PM   #48
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It almost seemed like the noise got better with the AC Cycling on...

Not sure if the noise is the compressor Clutch or not...

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Old 03-27-2008, 09:01 PM   #49
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This will sound "out there", but I once had a '96 Le Sabre with a 3.8 come into my shop making that exact racket. It turned out to be a roller lifter with a flat spot worn in one of the lifter rollers. Once I pinpointed the noise with a stethescope, I pulled the front valve cover and loosened each rocker arm individually, until I found the one that made the noise disappear. I'm not saying this is your problem, but the noise was VERY similar, and that'* what it turned out to be on the Le Sabre.
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Old 03-28-2008, 03:56 PM   #50
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Quote:
Originally Posted by chillz1
This will sound "out there", but I once had a '96 Le Sabre with a 3.8 come into my shop making that exact racket. It turned out to be a roller lifter with a flat spot worn in one of the lifter rollers. Once I pinpointed the noise with a stethescope, I pulled the front valve cover and loosened each rocker arm individually, until I found the one that made the noise disappear. I'm not saying this is your problem, but the noise was VERY similar, and that'* what it turned out to be on the Le Sabre.
Out of curiousity, did that one make the noise off and on like mine is or was it constant? Mine comes and goes under different situations.
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