A friend of mine has a '66;Eldorado that I got running and driving last year after being in storage for almost 30 years.Car runs well, but now has developed a strange noise that appears sometimes after a cold start. It goes away after about 5 mins of running.
He made a video for me to have a listen. I find the noise pretty strange. It is a california car, so it has the A.I.R. system. What could this be?
With the AC on or off?
Greg Surfas
The AC is off. The AC is most likely not charged anymore, and compressor is not locked. I believe the compressor electrical connection is disconnected.
I don't see a video, but what does it sound like? Ticking, rubbing, buzzing, hissing?
Both sides, front/rear?
I reposted the video, so hopefully it works now.
It is more like a swooshing, grinding noise. Hard to explain.
From what I hear Just sounds like a motor with a few miles on it warming up.
Greg Surfas
Sounds almost like the fan blade striking the radiator. That's definitely not an engine noise.
I would agree, not an internal engine issue. Frequency seems a little high but how about the 'heat riser' valve?
Disconnect the belts one at a time and listen to it. That sounds like an alternator bearing or water pump bearing. Does it have an A.I.R. pump on it?
The engine itself sounds normal. I wouldn't touch that. It's an accessory or maybe even the torque converter, by the whirring sound it makes.
Just a thought, but could your fan blades be hitting the transmission cooling lines when cold?
Good suggestions that we can try. After listening a couple more times I also was thinking something in the line of bearing issue i the A.I.R. pump. Removing the belts one by one would be a good way to isolate the problem. Not sure about the fan blades.How to check if it is coming from the torque converter?
The tranmission lines and/or their metal ends will show wear spots.