Ok - Here is my story.
My wife's '94 347 convertible was running great until the end of last driving season (we live in Michigan) when her car developed a strange sound. Everything is great when the engine is cold but after about 5 minutes of driving and warming up, a screech develops from the front end accessories. I kind of sounds like a bearing in an alternator that is getting ready to seize up. I thought it was the alternator when I packed the car away because the screech would change in pitch at idle, and I could change the pitch with engine RPM.
I pulled her car out of storage a couple weeks ago to get it ready for the summer. I have a automotive stethoscope so I used it to find the screech. Alternator case? No. Power Steering pump? No. Water pump? No. I unhooked the fead belt and expected the noise to go away. Nope! Noise is still there so I think that I ruled out the alternator, water pump and power steering pump.
I searched the forums for similar problems and the closest thing I could find was the distributor. I put a new distributor in but unfortunately, the noise is still there.
Does anybody have any idea what this could be? Timing chain? Cam bearings? Rod or main bearings? What does a car sound like if it has spun a bearing? My oil pressure is good and the sound is not there when the car is cold.
I am at a loss. Thanks so much for your help.
John
My wife's '94 347 convertible was running great until the end of last driving season (we live in Michigan) when her car developed a strange sound. Everything is great when the engine is cold but after about 5 minutes of driving and warming up, a screech develops from the front end accessories. I kind of sounds like a bearing in an alternator that is getting ready to seize up. I thought it was the alternator when I packed the car away because the screech would change in pitch at idle, and I could change the pitch with engine RPM.
I pulled her car out of storage a couple weeks ago to get it ready for the summer. I have a automotive stethoscope so I used it to find the screech. Alternator case? No. Power Steering pump? No. Water pump? No. I unhooked the fead belt and expected the noise to go away. Nope! Noise is still there so I think that I ruled out the alternator, water pump and power steering pump.
I searched the forums for similar problems and the closest thing I could find was the distributor. I put a new distributor in but unfortunately, the noise is still there.
Does anybody have any idea what this could be? Timing chain? Cam bearings? Rod or main bearings? What does a car sound like if it has spun a bearing? My oil pressure is good and the sound is not there when the car is cold.
I am at a loss. Thanks so much for your help.
John