Chirping under hood

Tiny
VONZIP
  • MEMBER
  • 2007 TOYOTA CAMRY HYBRID
  • 250,000 MILES
When I start car or hold brakes on, there is a chirping noise from under the hood. Release brakes to drive and chirping stops immediately.
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Thursday, May 9th, 2019 AT 10:29 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Welcome to 2CarPros.

Most often, a chirping noise is the result of a drive belt. What I need you to do is have a helper start the car to create the noise while you open the hood and try to determine if the noise is from the drive belt. The first picture I attached shows what the belt looks like. Now, if it seems to come from the belt, try this trick. Pour a small amount of water on the belt to see if it changes the sound in any way. If it does, either the belt is slightly loose or it is dry and cracked from age and needs replaced. Note, the second pic attached shows different conditions of the belt which can cause issues. If it is loose, the tensioner will need replaced. It is an automatic tensioner. Please make sure to protect your eyes, clothing, and don't get too close to moving components.

Also, here is a link you may find of interest:

https://www.2carpros.com/articles/chirping-noise

____________________________

If you find the belt needs replaced, here are the directions. Pics 3 and 4 correlate with these directions.

REMOVAL

1. REMOVE FRONT WHEEL RH
2. REMOVE ENGINE UNDER COVER RH
3. REMOVE FRONT FENDER APRON SEAL RH
4. REMOVE V-RIBBED BELT TENSIONER COVER SUB-ASSEMBLY

picture 3

(a)Remove the 2 bolts and V-ribbed belt tensioner cover.
5. REMOVE V-RIBBED BELT

picture 4

(a)Loosen the V-ribbed belt tensioner counterclockwise, then remove the V-ribbed belt.

NOTICE:
- Be sure to connect the tools so that they are in line during use.
- When retracting the tensioner, turn it clockwise slowly. Do not apply force rapidly.
- After the tensioner is fully retracted, do not apply force more than necessary.

_______________

INSTALLATION

1. INSTALL V-RIBBED BELT

picture 5

(a)Loosen the V-ribbed belt tensioner arm counterclockwise, then install the V-ribbed belt.

picture 6

(b)If it is difficult to install the V-ribbed belt, perform the following procedure:
(1)Put the V-ribbed belt on every pulley except the tensioner pulley as shown in the illustration.
(2)While releasing the belt tension by turning the belt tensioner counterclockwise, put the V-ribbed belt on the tensioner pulley.

NOTICE:
- Be sure to connect the tools so that they are in line during use.
- When retracting the tensioner, turn it clockwise slowly. Do not apply force rapidly.
- After the tensioner is fully retracted, do not apply force more than necessary.

(3)After installing the V-ribbed belt, check that it fits properly in the ribbed grooves. Check to confirm that the belt has not slipped out of the grooves on the bottom of the crank pulley by hand.
2. INSTALL V-RIBBED BELT TENSIONER COVER SUB-ASSEMBLY

picture 7

(a)Install the V-ribbed belt tensioner cover with the 2 bolts.
Torque: 9.0 Nm (92 kgf-cm, 80in-lbf)
3. INSTALL FRONT FENDER APRON SEAL RH
4. INSTALL ENGINE UNDER COVER RH
5. INSTALL FRONT WHEEL RH
Torque: 103 Nm (1,050 kgf-cm, 76ft-lbf)

_____________________________________

Let me know if this helps or if you have other questions.

Take care,
Joe
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Thursday, May 9th, 2019 AT 7:16 PM
Tiny
VONZIP
  • MEMBER
That's great. But, the noise occurs when I apply the brake while sitting still. When the hybrid system is on and the engine stops because it isn't needed I still get the chirping noise when I apply the brake. It stops chirping when I release brake pressure. Therefore it is not related to any turning portion of the engine.
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Sunday, May 12th, 2019 AT 10:05 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Welcome back:

I totally understand. When you open the hood, can you tell aprox where the sound is coming from? Also, is it possible for you to upload the sound so I can hear it?

Let me know.

Joe
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Sunday, May 12th, 2019 AT 8:14 PM
Tiny
VONZIP
  • MEMBER
It comes from the right hand (passenger) side. Near the right hand headlight. Cannot make a recording.
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Monday, May 13th, 2019 AT 6:04 AM
Tiny
KEN
  • ADMIN
You can use your phone to take the video so we can hear the noise. Here are diagrams showing some of the hybrid components can you take a look to see if these are what is making the noise? Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
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Tuesday, May 14th, 2019 AT 9:51 AM

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