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watching your videos, it appears there is a delay of a few seconds after engine off before the sound occurs, I agree with the below comment the radiator grille is a good suspect.
After a normal journey ( where you expect this to happen) get out of the car and take up an eye
level position in front of the radiator grille and watch/listen then get someone else to turn off the
ignition switch to engine stop full off.
Edited by KenC on 11/06/2018 at 10:21
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watching your videos, it appears there is a delay of a few seconds after engine off before the sound occurs, I agree with the below comment the radiator grille is a good suspect.
After a normal journey ( where you expect this to happen) get out of the car and take up an eye
level position in front of the radiator grille and watch/listen then get someone else to turn off the
ignition switch to engine stop full off.
KenC,
Have checked through grill as suggested, can see horizontal vanes but these do not move at the time of the klunk noise. In fact they do not seem to move at all; maybe the weather is too hot for them to close? Thank you for the suggestion and one more thing ruled out. Regards, Richard.
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Assuming you "have" got one the devices that opens and closes the radiator grille, yes I agree it must be controlled by the ambient temperature so that in a cold start scenario the radiator grille will be closed to give the engine a quicker warm up, then ( I am guessing ) the flaps open and close depending on how hot the engine gets.
I recall reading somewhere that ford claimed this system also improved the aerodynamics on the car resulting in less drag). It might be worth speaaking to your local ford dealer to see if they can elaborate on how it might sound when operating.
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KenC, agree, found this video from Ford that confirms youtu.be/6K4eh-BDR9g
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Anyone have any views on whether this could be gearbox, clutch or dual mass flywheel was related?
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Looked at your excellent videos. Have you tried stopping without using the footbrake, ie by slipping the gearbox into neutral and stopping using the handbrake?
If this doesn't generate the noise I would suspect something is loose on the front suspension, subframe to body mounts, suspension to subframe etc.
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Looked at your excellent videos. Have you tried stopping without using the footbrake, ie by slipping the gearbox into neutral and stopping using the handbrake?
If this doesn't generate the noise I would suspect something is loose on the front suspension, subframe to body mounts, suspension to subframe etc.
Focussed, have not tried that, will give that a go over the weekend; thank you. Kind regards, Richard.
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Looked at your excellent videos. Have you tried stopping without using the footbrake, ie by slipping the gearbox into neutral and stopping using the handbrake?
If this doesn't generate the noise I would suspect something is loose on the front suspension, subframe to body mounts, suspension to subframe etc.
Focussed, have tried what you have suggested as well as stopping just by rolling to a stop, needed a very quiet road. The klunk still happens as before but in addition I have noticed that it sometimes occurs before the engine has stopped. Regards, Richard.
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Bit more info, klunk happens when in gear, not in gear, handbrake on, handbrake off, clutch in, clutch out, engine stopped, engine at idle, car stopped, car nearly stopped, coming to a stop by braking, using handbrake or simply by rolling to a stop.
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I'm still for removing the mounting bolts and a visual inspection of same.
your looking/feeling for a ridge on the smooth shaft.
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I'm still for removing the mounting bolts and a visual inspection of same.
your looking/feeling for a ridge on the smooth shaft.
Hardway, car is in the garage on Monday and will ask them to take a look. Thank you.
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Well best of luck with the garage finding what is causing the noise.
Maybe a bit of a clue in what you wrote:-
"I have noticed that it sometimes occurs before the engine has stopped"
Which seems to indicate to me that it may not be engine mount related, unless one of them is broken, misaligned, loose etc.
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Update: Initially the garage thought it may be the EGR valve but after some fault finding believe they have located the problem, a deformed surround of the active grill system. KenC earlier in the thread pointed at these variable horizontal vanes as possibly being the problem. The garage didn’t have the part and the car is now booked in on the 12th July for the part to be replaced. Thank you for your interest. I will report back on the 13th with an update. Regards, Richard.
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But I think you said that the "vanes" weren't moving when the noise occurred?
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But I think you said that the "vanes" weren't moving when the noise occurred?
Yes, that is what I said as I couldn’t see anything moving. Let’s wait and see.
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The reason you could not see anything moving is because the mechanism is broken.The small electric servo motor is moving ,but has become detached from the flaps.The klunk noise is the servo trying to ratchet the broken mechanism. Seen this before several times ,usually after a very slight impact to the bumper.
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The reason you could not see anything moving is because the mechanism is broken.The small electric servo motor is moving ,but has become detached from the flaps.The klunk noise is the servo trying to ratchet the broken mechanism. Seen this before several times ,usually after a very slight impact to the bumper.
elekie&a/c doctor, sounds like this could be it. Will try and take a look at the servo before it goes into the garage. Thank you.
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The reason you could not see anything moving is because the mechanism is broken.The small electric servo motor is moving ,but has become detached from the flaps.The klunk noise is the servo trying to ratchet the broken mechanism. Seen this before several times ,usually after a very slight impact to the bumper.
It must be a hell of a servo motor if it makes the video camera jump in the second video from the OP.
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No result yet? I'm interested as to the outcome so bumping this back to the top.
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Car now fixed. Garage replaced active grill shutter and link has now gone. Thank you to everyone for their help. Regards, Richard.
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Good news and a gold star to elekie for diagnosing the problem 1st time on the day of your original post.
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Elekie, sorry forgot to say thank you to you specifically. Thank you.
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Well you live and learn - good job it's sorted, I found this video showing how they work.
www.youtube.com/watch?v=yCsvV50uLUg&ab_channel...p
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