Chirping/ticking sound

KVANSETERS

MEMBER
1999 CHEVROLET SILVERADO
5.3L
V8
4WD
AUTOMATIC
200,000 MILES

This chirping/ticking sound happened immediately after hitting a hard bump. The sound only happens when accelerating. Whether it be from a complete stop or going 55. The sound doesn't happen when idling at a stoplight or in park. The sound doesn't happen when given gas in park it only happens when in gear under load. The more gas/ acceleration/RPM the faster the sound but when cruising there is no sound. Also when going in reverse there is no sound until I come to almost to complete stop when braking then there is a brief sound for just a moment before I come to a complete stop. Please help me figure out what this is.

4 Replies

KVANSETERS

MEMBER
3 POSTS

I know that it is not the lifter, and it kinda sounds like it is under the truck.

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Saturday, June 15th, 2019 AT 1:11 PM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Welcome to 2CarPros.

That's a tough one. When reading your post, the first thing I thought was an exhaust leak. However, I would think you would hear it when you hit the gas in park too. Just for the heck of it, check around the exhaust manifold and all connections under the vehicle. Also, has there been any notable power loss or change in fuel economy that could indicate a partially plugged converter?

Let me know. When checking, check where the oxygen sensors screw into the exhaust. Also, if it is loud enough to record, can you record it and upload it for me to hear?

Joe

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Saturday, June 15th, 2019 AT 6:21 PM

KVANSETERS

MEMBER
3 POSTS

I am not sure about any power loss or fuel economy. The exhaust manifold has the rear most bolt broken off. I am going to keep looking around for another issue and I hope to get it into a mechanic soon. I don't have the tool to extract that broken bolt. It is in a very tight place. I really appreciate your help and will keep you updated. I will try to have someone help me record the sound and upload it.

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Sunday, June 16th, 2019 AT 3:04 PM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Welcome back:

Happy to help. I will tell you that often times, an exhaust manifold leak will sound like a ticking. It could even be a different location on the exhaust, but if a bolt is broken on the manifold, I bet that is the cause.

Let me know what you find.

Take care,
Joe

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Sunday, June 16th, 2019 AT 8:40 PM