RE: [alfa] Frwapping noise at 17000 RPM

["Jeff Greenfield" <alfaguy@xxxxxxxxxx>]

Zach -

17,000 RPM huh? No wonder it is making noises, last I knew an Alfa four
cylinder redlined at about 6500 RPM or so. 17,000 is right up there with F1
cars and some superbikes (I think), no wonder it is screaming for mercy.

(Note: Tongue planted firmly in cheek :-)

Seriously, though I assume you mean 1,700 RPM. Does the car have a sump
guard? If so, it is bent and hitting the sump.

If not other possibilities are severely sagging engine mounts (sump hitting
crossmember), or the exhaust is hitting something somewhere.

One other possibility, did this start happening right after the clutch
replacement? If so, check that the bolt that holds that transmission
crossmember to the transmission is actually going through the metal center
part of the bushing in the back of the transmission. That will make an awful
vibration and noise ... BTDT.

Let us know what you find.

Jeff

-----Original Message-----
From: owner-alfa@domain.elided [mailto:owner-alfa@domain.elided] On Behalf Of
Zachary Baker
Sent: Friday, October 03, 2003 8:39 PM
To: alfa@domain.elided
Subject: [alfa] Frwapping noise at 17000 RPM

I have an odd noise coming from the engine bay of my '89 Spider. It is a
quick buzz or rapping sound and happens only at 17000 RPM. It is not always
noticible when accelerating. It is a quick burst (about 1 second) when the
RPMs drop quickly, or a constant sound if I keep the RPMs right at 17000.
The noise does not happen haphazardly. It is there every time I pass 17000
RPM except when accelerating quickly May be there even then-just cannot hear
it.
I have already checked for fan/shroud clearance. Doesn't look like that is a
problem.
I do have some exhaust noises, but this doesn't seem to be one of them.
I did just replace the clutch/bearing/throghout/pressure plate, but the
noise happens whether the clutch is in or out. In gear or out.

Has anyone had this problem?  Thanks in advance.

zach
'89 Spider (not pretty, but getting there)
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