350iroc

Hello everyone. I have a 99 WS6 that has just started squealing from the engine. I removed all belts and the noise persists. The oil pressure is 40lbs and I didn't see any metal particles in the oil, on the dipstick anyway. The squeal gets louder as the engine revs up. I am not familiar enough with this engine to guess where to start. A friend did suggest maybe a lifter roller had locked up. Has anyone experienced this problem or could point me in the right direction. Thanks for all help.

GSus

iTrader: (2)

Do you know what side it's coming from? Top or bottom?

WS9 Formula

iTrader: (7)

mine is doing the same thing but my squeal goes away the longer i drive it. i took the belt off and the squeal went away. i think mine is the water pump pulley.

Z28_LT1

iTrader: (2)

It sounds like it's a potential internal problem and those are usually big problems.

350iroc

By the way, for some reason I keep thinking it is a 99 but is actually a 98. The sounds seems to be coming from the front of the engine, top side it does seem, not left or right. I also forgot to mention that it idles a little rough, the rpm's don't change, but it acts more like I have installed a larger cam as for as the idle quality. It is a squeal sound instead of a ticking sound. It does squeal in a pattern though and not just one continous squeal.

Z28_LT1

iTrader: (2)

I'd be interested in seeing a video of this.

350iroc

I looked at a post on You Tube of a Camaro with the same sound, but not same problem. I was so hoping that was going to fix it, but no luck.... It was posted as (Z28 LS1 Squeal.) I will see if I can get a video of mine making the noise.

DVS99TRANS

iTrader: (7)

I had video of mine but I think I took it down a while ago on my 99 TA. In my case it was a rod bearing on the way out. It sounded just like a squeeling belt with the belt off (only one for me with AC removed). Hopefully it isn't the same thing for you fella and its just something inexpensive. But get a video up if you can.

Also there is a chance it could be you oil pump o-ring gasket, I have seen that before if it isn't your valvetrain. There was a TSB out on them but can't remember which GM vehicles they applied it too. Not that they would honor it now though, but that caused a squeeling sound.

Z28_LT1

iTrader: (2)

I don't think it has to do with the rod bearings. He said the sound was coming up top in the front which makes me think it has to do with the bearing for the cam.

DVS99TRANS

iTrader: (7)

Thats what I thought mine was and tore my topend apart, every checked fine. I'm not the only one who has experienced this on here. I have ran into another couple threads that have been rod bearings but the noise appears to be coming from the topend. Truthfully at first I thought it was a stuck lifter, but lucky me it wasn't lol.

350iroc

I tried for hours but could not get the video of the mystery noise to upload. Any suggestions on that as well.

78novacaine

iTrader: (2)

Could be a bad vacuum leak, I know you probably checked already, but sometimes the simplest problems are the hardest to remember to check!

Z28_LT1

iTrader: (2)

The easiest way is to upload it to Youtube and just post the link.

WSSexy

Did you ever find the solution?

RevGTO

iTrader: (12)

The OP has only posted four times total in almost 5 years - and all of them were in this thread. So I think it highly unlikely he's going to respond to your question. This one needs to go to its rest.

WSSexy, Start your own thread or search for something recent if you're trying to chase down a problem ...