Strange Noises Coming From Under Dash
Thread Starter
Racer
Joined: May 2014
Posts: 300
Likes: 34
From: Bella Vista, AR
Strange Noises Coming From Under Dash
Car: 1999 Corvette Convertible/ Manual Trans. When I turn the key on, the display lights up as normal and then a creaking noise can be heard coming from under the dash (center) from the ventilation/defrost vents. That's where the noise seems to be coming from.It sounds like a valve opening and closing or gears with the accompanying creaking sound (like a rusty door hinge. It recycles, over and over again creaking and groaning with a distinct pattern lasting 20-30 seconds and then it starts over again. As long as the key is turned on or the engine is running it makes this weird noise. It started a week or so ago and seems to be getting worse. It has the LCM5 column lock fix as well as the skip shift lockout installed. Everything else is stock. Any ideas? This noise is driving me nuts.
Thread Starter
Racer
Joined: May 2014
Posts: 300
Likes: 34
From: Bella Vista, AR
Thread Starter
Racer
Joined: May 2014
Posts: 300
Likes: 34
From: Bella Vista, AR
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Unless you are rolling in cash, the SHOP repair is normally very expensive..
The LEFT actuator can be accessed from under the dash but,,, its still a task that is a little tedious.
IF,, you remove the entire dash and dash pad,,, this is what it looks like from the TOP. Its above and a little inboard of the accelerator peddle
Here is a side shot with the air box removed:
Here is what you will most likely see if you open up your actuator. A cracked gear:
Bill
Last edited by Bill Curlee; Nov 30, 2015 at 07:46 PM.
.
Joined: Apr 2013
Posts: 5,042
Likes: 1,157
From: Oregon
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23
The ACTUATORS actually control the TEMPERATURE of the air flow. When you change the Temp **** on the HVAC Control Module, it cause the actuator to change the position of a damper to allow more or less air flow over the AC Evaporator coil or the heater core.
Thanks Bill,
I did not know all of how it worked or did the job.. LOL I was a honda tech
Thanks Bill,
I did not know all of how it worked or did the job.. LOL I was a honda tech
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Thread Starter
Racer
Joined: May 2014
Posts: 300
Likes: 34
From: Bella Vista, AR
The ACTUATORS actually control the TEMPERATURE of the air flow. When you change the Temp **** on the HVAC Control Module, it cause the actuator to change the position of a damper to allow more or less air flow over the AC Evaporator coil or the heater core.
Unless you are rolling in cash, the SHOP repair is normally very expensive..
The LEFT actuator can be accessed from under the dash but,,, its still a task that is a little tedious.
IF,, you remove the entire dash and dash pad,,, this is what it looks like from the TOP. Its above and a little inboard of the accelerator peddle
Here is a side shot with the air box removed:
Here is what you will most likely see if you open up your actuator. A cracked gear:
Bill
Unless you are rolling in cash, the SHOP repair is normally very expensive..
The LEFT actuator can be accessed from under the dash but,,, its still a task that is a little tedious.
IF,, you remove the entire dash and dash pad,,, this is what it looks like from the TOP. Its above and a little inboard of the accelerator peddle
Here is a side shot with the air box removed:
Here is what you will most likely see if you open up your actuator. A cracked gear:
Bill
Last edited by Ceedub53; Nov 30, 2015 at 08:16 PM.
.
Joined: Apr 2013
Posts: 5,042
Likes: 1,157
From: Oregon
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23
I would do both if your going to have shop do it. But the left is not tooo bad.
I have seen some great info from here on how to do it. Thanks Bill for chiming in on this
I have seen some great info from here on how to do it. Thanks Bill for chiming in on this
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Not sure I have the requisite skill set to dismantle the dash and dash pad, replace the part and get everything back together properly. Would you also replace the right actuator as well since the dash is open and exposed? Are the post 2001 actuators better and will they work on the 99'?
You will save approx $400.
Thread Starter
Racer
Joined: May 2014
Posts: 300
Likes: 34
From: Bella Vista, AR
[QUOTE=Smoken1;1591012693]I would do both if your going to have shop do it. But the left is not tooo bad.
I have seen some great info from here on how to do it. Thanks Bill for chiming in on this[/QUOTE
Indeed, thanks to you and Bill. This has to be one of the best forums on the internet. Always helpful folks here to assist with C5 Vette issues.
I have seen some great info from here on how to do it. Thanks Bill for chiming in on this[/QUOTE
Indeed, thanks to you and Bill. This has to be one of the best forums on the internet. Always helpful folks here to assist with C5 Vette issues.
Thread Starter
Racer
Joined: May 2014
Posts: 300
Likes: 34
From: Bella Vista, AR
My point of that reply was to let you know that YOU DO NOT need to dismantal the entire dash for the LEFT actuator. Just remove the drivers side under dash close out panel and GETERDONE! If you cant bend or are a little to round,, just remove the seat. Even I can fit under there with the seat out!!
You will save approx $400.
You will save approx $400.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Here is how to remove the Knee Bolster for access to the driver side one. Some people do not remove all the console pieces to remove it but loosen up the piece at the ignition switch which can allow you to remove the bolster.
http://www.vetteessentials.com/instr...zel_howto.html
Mr. Sam
http://www.vetteessentials.com/instr...zel_howto.html
Mr. Sam