I replaced the head gasket on a 2003 Chevy Malibu 3100 engine,
once I cranked it. At first, it wasn't making any noise then I test drove it, it started squealing when I hit the gas...
I thought it might have been the Belt, belt tensioner, water pump, After replacing it all new still same squealing when I crank it and hit gas it worsens.
I begin to think it might have been the Ac compressor squealing, because I removed it, Then try to crank the Engine with no belt on it today and Ac removed. Waiting on a Bypass ac pully to come in. I also have oil leaking out of the Oil pressure sensor, So I have one of those on the way to replace that. I thought it might have been a rocker arm, doesn't sound like one, though... I have removed the deep stick out while running and not running it didn't help with the Squealing of the Engine? I'm running out of Ideas Any help Please I can also Record better video and upload it if we need to....
Youtube,
https://youtube.com/shorts/_bJkimhziVs
Update oil Is changed, and the oil pressure unit changed and ac bypass updated, still same thing.
Everything in blue I have changed, high lighted, Please Help Mr Scotty https://ibb.co/F5wkcPz
Well that's definitely a squeaking pulley. And of course can be any of the pulleys that are on the car. When you remove the belts, you'll notice the noise will go away for sure. Then you get the fun of trying to figure out which one of those pulleys is making the noise. It can be a real headache, get a stethoscope and listen closely when it's making the noise
It has 1 belt runs all, I removed the belt, and it still squeals. Maybe Crank pulley? Not sure. Other than belt is off and still doing same thing .
the squeal is minor. What about the thudding sound.
I'll check in to that once I get the squealing fixed, thank you as well.