JSRossie

Hi all... 2001, 996 Cab with about 134K miles. Engine runs strong, good compressions. On every other engine shutdown or so, I get an unusual clicking noise. Just wondering if anyone else has heard something like this. I have a short video where you can hear it. It's a click right as the engine stops. Not sure if it's a problem or not so tossing it up here for some opinions.

Any ideas? Thanks in advance!

Video of shutdown noise:

Dr_Strangelove

Do you have a manual car? If so - see if you can reliably stop the noise by holding the clutch pedal in while you shut down the engine.

wildbilly32

Sounds pretty benign to me. Maybe a relay flipping to off position?

JSRossie

JSRossie

wildbilly32

Is the sound actually in the engine compartment or just in the back part of the car?

JohnCA58

What exhaust do you have ? have had some exhaust that click or crackle on cool down.

JSRossie

So tried a few times and there does not seem to be a correlation to clutch in and the noise. I experienced it at least once with the clutch in, but I'll test it again after the car has been driven harder. I couldn't get it to reliably make the noise clutch in or out.

JSRossie

It's factory exhaust with a Fister mod. Doesn't sound like the usual kind of pings you get from an exhaust system. Plus, when it does occur, it always happens right at shutdown.

JSRossie

Hard to tell, I'll have to get a helper to test that. My gut is engine compartment, but it's a cabriolet so I could be wrong.

Dr_Strangelove

Darn. Some of us get a little drivetrain rattle on shutdown. However, with the clutch disengaged it goes away. In my case it's a 100% correlation. It shouldn't really matter how the car is driven beforehand. Best of luck - this was my only experience or semblance of wisdom I had to share, unfortunately.

dporto

JSRossie

TexSquirrel