Noise while accelerating

RICKYSH11

MEMBER
2005 CHEVROLET TRAILBLAZER
4.2L
6 CYL
4WD
AUTOMATIC
129,000 MILES

When accelerating I hear this noise, it is hard to describe the sound but I am not sure what the noise is but it seems to be coming from the front end of the vehicle. The engine seems to lose power when accelerating while the A/C is running, which may or may not be related since the noise is prevalent regardless of the status of the A/C.

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5 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

Hello,

First thanks for the video makes my job so much easier. :) I would remove the serpentine belt to see if it makes the same noise. If so the timing chain guides have let go making the noise inside the engine which happens. Here are the repair guides to help you see what it will take to repair the vehicle:

This guide will how you how to remove the belt:

https://www.2carpros.com/articles/replace-serpentine-belt

Here are the timing chain and camshaft actuator repair diagrams. Straight six right?

Check out the diagrams (below).

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken

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Monday, February 26th, 2018 AT 2:10 PM

RICKYSH11

MEMBER
74 POSTS

Yep 6 straight, thanks for your reply, I really appreciate the diagrams this will help tremendously.

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Tuesday, February 27th, 2018 AT 6:56 PM

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

No problem if you are doing the work yourself or having it done please take a shot of the broken parts and post them here so it will help others.

Car repair is fun and it keeps us out of trouble win win! Ken

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Wednesday, February 28th, 2018 AT 9:53 AM

RICKYSH11