Grinding noise when starting

2000 CHEVROLET SILVERADO
200,000 MILES • 4.3L • V8 • 2WD • AUTOMATIC
Avatar
THEMRRYZAK
  • MEMBER
  • 1 POST
when i start my truck, it makes a grinding noise; like something is turning and grinding. It does this in park while idling and also when being driven. i want to say a couple of times it seems like the engine bogged down to some degree as if something was causing friction on the motor. i thought it might cease but it didn't. it doesn't do this every time i start it but it has a few times. truck doesn't seem to be running too bad aside from this. no overheating or anything but want to say maybe a little loss of power and just a wee bit of a rough shift which it wasn't doing before. i bought the truck about 2 years ago. It sat for about a year and a half. i did start it several times though, I haven't really been driving it just an occasional trip to the store a couple blocks away. I'm thinking maybe the trans fluid and filter need to be replaced. I was going to start there. oh, and i do have a bad water pump which leaks water from the gasket which i am in the process of replacing. don't know if a bad water pump would make the grinding noise and tax the engine. i doubt it. but any advice, ideas, or instruction would be very much appreciated. thanks fellas
Feb 16, 2022 at 9:57 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

I have a feeling what you hear is the water pump bearing. Do you think you could record the sound and upload it for me to hear? Also, if you grab the water pump pulley, is there play in and out or side to side?

Let me know.

Joe
Feb 17, 2022 at 8:29 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.