hmm, after listening to the first video, I don't here that whistle that it starts to do around 1:13 seconds into the first video. Of course I didn't leave my engine running that long without the fan going so I don't think this test is conclusive.

Paul, my 87 Carrera make that's slight whistling sound sometimes. My guess is it's the Alternator bearings???

Could the clacking sound be the throw out bearing failing? If you press the clutch in, does the clacking sound stop or change at all?

Paul,

Grab a long screw driver or rod and use it as a conductor to isolate the sound and get back to us, just a suggestion. Do not worry about reving it up. I can hear it better when it idles. Leave the belts off for now until you isolate the sound.

I agree. I'm still hearing the clacking sound at lower revs.

I'm not sure I understand how this works. Can you explain this?

You are basically creating a poor-man's stethoscope. By using a long screwdriver, length of pipe, etc, you an start the engine and then place one end of the long screwdriver or pipe up against the area you think the sound might be coming from and then place the other end up against your ear. Move the "stethoscope" around and look for where the sound is coming from. As you approach the offending area, the sound will become noticeably louder to your ear.

Re: the clickity clackity

Sounds like your due for a valve adjustment. You could do them yourself or you could take it to a local shop and have them do it. Dan H., aka forum member Syncroid has been good to me, and works at RMG in Sunnyvale.

They could also diagnose the whistle noise you are worried about.

+1 on the valve adjustment however I would have expected the clackety sound to change with the revs. As for the fan noise. Mine was also very noisy sounded kind of like a supercharger whine. I found that after I removed the fan and polished off all of the casting marks and seams the fan was significantly quieter. And by significantly I mean you can only now barely hear fan noise going down the road with the top down.

Yeah, the fan looks alot like the intake of a jet engine. I would imagine that at certain RPMS with all the air that it sucks and pushes that it would produce some fan noise. I took my fan off and bead blasted it about 4 months ago.

I talked with Tom Amon about the clacketing noise. He said that it's a 50-50 chance that it could be something serious. He mentioned bearings going bad, he told me that next time I do my oil change to cut open the oil filter and look for any metal debris which could be a sign of the bearings going bad but he said that while revving the engine he would expect to hear a different sounds so he said that it might not be this afterall but to do the filter check and look for this debris.

Next time I change my oil I'll do this.

One possibility that no one mentioned yet is failed chain tensioners.

To me, the "clackety clack" resembles a failed chain tensioner and or stretched chain slapping metal. Just had my tensioners replaced after hearing similar noises; Problem was solved.

You had the inside of the intake cleaned up by Andial?

jp

huh?

sound like the loose chain scraping on some metal housing. Strange thing is that my car has the same sound when I just bought it. It was gone after some oil change.

Paul, look at your intake plenum; there's a weld on both chambers.
This means that they were cut in order to access the inside for improving the flow characteristics.

jp

Rebuild or valve job
 

I dont know about this alternator stuff, I guess the whisping and such from that is not a big deal to me. But what I hear is he needs a valve adjustment or head rebuild. It sounds loose....On mine I had a rocker arm that was totally loose and clacked, BUT RAN GREAT!...

But the pinging and knocking I hear makes me believe that this needs to be done.

And at that point, he can fix and look at all the other stuff that was mentioned before me.