Stumped - help please

[Lurch]

Posted on here last week about a whistling noise. Now seems to sound more like fanbelt slipping, but only makes the noise on acceleration and deceleration. Changed the fanbelt. No Joy. Local mechanic suggested I have the alternator reconditioned as sounded like it might be that. No Joy.

Sound is coming from that area, but I have no clue what to check next HELP please!

Car drives fine just sounds bad.

[Podie]

Crack in the air filter casing? - or the plenum?

[jonk]

I had a problem with the water pump and fan in my old 280i Tasmin (same 2.8 Ford lump as the S1) and that caused a fan-belt squeak every time I was pulling off in 1st gear....

[Lurch]

Podie said:

Crack in the air filter casing? - or the plenum?

Did a thorough check of this area when it first happened, tightened all clips etc, and checked for leaks but to no avail.


Jonk. How did you ID it as the water pump/fan, and how did you resolve it. It happens in all gears rather than just first, but willing to check anything. Can explain who to confirm if this is the prob ... please!

Cheers so far

[John Mac]

Had a similar whistling/squeal on my wifes car and eventually found it by putting WD40 onto the various pulley shafts and by elimination got down to the water pump being the problem.
Maybe worth a try.

[jonk]

John Mac said:

Had a similar whistling/squeal on my wifes car and eventually found it by putting WD40 onto the various pulley shafts and by elimination got down to the water pump being the problem. Maybe worth a try.

The water pump was visably wobbling, so it gave me the clue. The WD40 idea sounds like a good plan though...

[Lurch]

cheers guys. I'll have another go this evening.

[minghis]

This sounds familiar - I had what I thought was a dry alternator bearing, a sort of whistly rattle on accelleration and when backing off, turns out it is a slight exhaust blow where the manifold down pipe meets the exhaust at the front of the car behind the radiator.

If you have a good look around this area you may have the same, buts it's a s*d to see.

Minghis.

[Ren Dao]

minghis said:

This sounds familiar - I had what I thought was a dry alternator bearing, a sort of whistly rattle on accelleration and when backing off, turns out it is a slight exhaust blow where the manifold down pipe meets the exhaust at the front of the car behind the radiator. If you have a good look around this area you may have the same, buts it's a s*d to see. Yeah was wondering about that myself Minghis.

[Yellabelly]

Ren Dao said:

minghis said: This sounds familiar - I had what I thought was a dry alternator bearing, a sort of whistly rattle on accelleration and when backing off, turns out it is a slight exhaust blow where the manifold down pipe meets the exhaust at the front of the car behind the radiator. If you have a good look around this area you may have the same, buts it's a s*d to see. Yeah was wondering about that myself Minghis.

OK Ren you're through, we have a line of communication, please leave your comment after the tone - beep - beep - beeeepppp!

[lurch]

minghis said:

This sounds familiar - I had what I thought was a dry alternator bearing, a sort of whistly rattle on accelleration and when backing off, turns out it is a slight exhaust blow where the manifold down pipe meets the exhaust at the front of the car behind the radiator. If you have a good look around this area you may have the same, buts it's a s*d to see. Minghis.

You may have it the nail on the head! I had the down pipes replaced at DG's, and it started doing it on the way back. Did'nt suspect it, as I have not heard a blowing exhaust make quite that noise before.

Cheers.

PS. I'll let you know if it is.

[S3DaveP]

Hi My S3 is doing it at the moment, got underneath and i can see that the manifold to exhaust joint is leaking.
It looks a bit bent in that area, so maybe i have grounded it, exhaust putty just blows out so if anybody has a better solution please tell me

Cheers

Dave

[lurch]

Sorted mine on Sat. Noise was caused from a pinprick where the manifold met the downpipes. I have temporarily fixed it with Gun Gum, and has been fine all weekend. Will, take it off, clean etc and relcamp at some point, but for the time being ...