90 Honda Accord - rattling noise after shutdown

[RP]

Just changed alternator due to seized bearing and installed new alt and P.S. belts while I was at it. Car starts and runs fine now but there is a rattling sound while the car is running that I can not pin point. (I have been using a plastic tube as a stethascope)

Its in the area of the alternator/P.S. pump/A/C compressor but I don't believe its any of these items. Also when I shut the car off something keeps turning (and rattling) for at least 3-4 more seconds (there is nothing visually moving during this time) Its been many years (and miles) since the last timing belt/water pump replacement. Could the water pump be the culprit?

Thanks

 

[Remco]

I'd loosen the belt to where it doesn't drive anything. Then briefly run the car and see if the noise stops. If not, the problem is elsewhere (distributor, maybe). If so, stop the car and try to manually figure out where the noise is coming from. Maybe something is rattling around in the alternator and when the engine stops, this thing just keeps rolling around for a bit. Hope this is useful.
Remco

 

[jmattis]

Just changed alternator due to seized bearing and installed new alt and P.S. belts while I was at it. Car starts and runs fine now but there is a rattling sound while the car is running that I can not pin point. (I have been using a plastic tube as a stethascope)

Its in the area of the alternator/P.S. pump/A/C compressor but I don't believe its any of these items. Also when I shut the car off something keeps turning (and rattling) for at least 3-4 more seconds (there is nothing visually moving during this time) Its been many years (and miles) since the last timing belt/water pump replacement. Could the water pump be the culprit?

Thanks

Loose water pump impeller? If it's that loose, it shouldn't take long before you find out the hard way.

JM

 

[Graham W]

Just changed alternator due to seized bearing and installed new alt and P.S. belts while I was at it. Car starts and runs fine now but there is a rattling sound while the car is running that I can not pin point. (I have been using a plastic tube as a stethascope)

Its in the area of the alternator/P.S. pump/A/C compressor but I don't believe its any of these items. Also when I shut the car off something keeps turning (and rattling) for at least 3-4 more seconds (there is nothing visually moving during this time) Its been many years (and miles) since the last timing belt/water pump replacement. Could the water pump be the culprit?

What about leaves/pine needles in the heater vent impinging upon the impeller fan blades?