Clicking Sound Upon Shutting Off Engine


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Old 08-23-16, 07:30 AM
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Clicking Sound Upon Shutting Off Engine

About four or five seconds after shutting my engine off, I hear several clicks from under the hood. It seems to be coming from the top of the motor and is a relay clicking sound. What is this sound? Injectors? Vehicle is a 2011 Acura TL. BTW, no, it is not heat shields, etc. cooling off. It is five or six rapid clicks and then stops.
 
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Old 08-23-16, 08:07 AM
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All of my modern cars have made odd noises when turning the car off and even when opening the door. Most notable is my BMW X3 which makes a lot of odd noises when you open the door after it's been parked a while. You can easily hear relays/solenoids clicking and motors running...
 
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Old 08-23-16, 11:38 AM
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It's your heat shield cooling down. Heat shield covering exhaust manifold. Or the manifold itself. As it sits rather high up on the engine, and metal is great sound conductor, it surely will sound like top of the engine.
 
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Old 08-23-16, 12:55 PM
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Sorry, but it's not the heat shield. The engine can be stone cold and it does it. It's a distinct relay clicking sound and it happens consistently. It's five or six rapid clicks and that's it.
 
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Old 08-23-16, 01:08 PM
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Probably relieving fuel pressure.
 
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Old 08-23-16, 08:48 PM
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Why be sorry? It was as good a guess as anything else. Second guess is ABS pump actuator resetting itself. My 07 Camry has "by wire" brakes and every time I shut her down, there is loud staccato of resetting brakes actuator valves from under the hood.
 
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Old 09-18-16, 04:21 PM
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Here's a video of the sounds. Seems like it's coming from inside the intake manifold.

View My Video
 
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Old 09-18-16, 05:15 PM
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Link is no good. My Jeep Grand Cherokee Limited made sounds after shutting down the engine. It was mostly the air baffles in the heat/cooling system resetting themselves to a default position.
 
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Old 09-18-16, 05:21 PM
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If its coming from the intake you are probably hearing normal IMRC operation.

https://www.yourmechanic.com/article...runner-control
 
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Old 09-18-16, 05:54 PM
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To view Mossman's video type the link below in your browser.
Name:  vid.jpg
Views: 61
Size:  5.7 KB

Mossman, Tiny Pics is blocked.
 
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Old 09-19-16, 10:41 AM
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This will make it easier for copying and pasting purposes:

http://************/r/2a7brr4/9

Replace ***** with tiny pic .com
 
 

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