[AYP]

Hello everyone,

I own a 2017 Figo diesel which has run 34,500 kms. Since the past few days, I have observed that after I switch off the car, the engine keeps vibrating for a few seconds. When I say vibrate, I mean that it feels that the engine is basically running even after the car is switched off. I do not hear the sound of the engine, but I can feel the vibrations which lasts for 2-3 seconds. This generally happens only after a long drive. What could be the reason(s) for this?

My hypothesis-

1. Engine mounts have worn out.

2. Injector issues leading to fuel injection even after the car is switched off?

3. Of course, it could be a combination of above.

Do help a brother out guys. Also, the car is still under extended warranty( EW is now available for upto 7 years). If the issue is due to engine mounts, will it be covered? The policy does state that wear and tear items are excluded.



Thanks.

[x-o-b]

I think this is normal, my Mahindra Bolero Pick-up 4X4 also does the same - has been that way ever since I bought it years ago.

[toiingg]

Are you sure it is the engine and not the radiator fan ?

Fords sometimes have the fan stay on even after the engine is switched off for sometime in order to cool off the coolant. Same with Fiats.

[NomadSK]

Originally Posted by AYP

1. Engine mounts have worn out.

2. Injector issues leading to fuel injection even after the car is switched off?

If its engine mount, then it would vibrate even at idle also.

However, since its happening after the ignition is switched off, I would first troubleshoot with MAF, Throttle body and finally the injectors. In the same sequence.

Did you try to slot OBD scanner ? It might throw some fuel related error codes.

[Omkar]

Originally Posted by AYP

Also, the car is still under extended warranty( EW is now available for upto 7 years). If the issue is due to engine mounts, will it be covered? The policy does state that wear and tear items are excluded.

Engine mounts are covered under the warranty in most cases. Better check with the service centre.

Originally Posted by toiingg

Are you sure it is the engine and not the radiator fan ?

Fords sometimes have the fan stay on even after the engine is switched off for sometime in order to cool off the coolant. Same with Fiats.

+1, the fan also stays on if the coolant level is low.

Originally Posted by NomadSK

If its engine mount, then it would vibrate even at idle also.

However, since its happening after the ignition is switched off, I would first troubleshoot with MAF, Throttle body and finally the injectors. In the same sequence.

Did you try to slot OBD scanner ? It might throw some fuel related error codes.

Agreed. If it's engine mount, you will notice the increased vibrations on the steering wheel and pedals. An OBD scanner would surely help shed some light. Could be some electrical issue as well.

[svsantosh]

Originally Posted by AYP

..I mean that it feels that the engine is basically running even after the car is switched off.

First time in my life I am hearing this observation. Dont worry, not possible. Engine wont run after you switch off the car.

This generally happens only after a long drive. What could be the reason(s) for this?

Did you check the fan? The fans usually run for a good 5-20 seconds in cars after you turn off the engine. It is upto the ECU to decide if it should or should not. Diesel or Petrol irrespective.

1. Engine mounts have worn out.

Valid point - but you will feel during start up also. Open the bonnet and let someone start stop the car few times. You can easily make it out, take help of a mechanic if needed.

2. Injector issues leading to fuel injection even after the car is switched off?

Dont worry - impossible.

Now ....
Check the silencer from the header to the tip. When cold, stand below the car (under a hoist) and punch the car with your fist. You will most likely see a torn rubber boot or mount. While at it, check for anything else suspect below the car.

[AYP]

Thank you all for the response. Back with some updates.

Originally Posted by toiingg

Are you sure it is the engine and not the radiator fan ?

Fords sometimes have the fan stay on even after the engine is switched off for sometime in order to cool off the coolant. Same with Fiats.

We had a Palio earlier. That long and loud radiator fan sound after switching off the car is a fond memory. Request you to check the videos which I have linked. It does seem that the radiator fan isn't functioning properly.

Originally Posted by NomadSK

If its engine mount, then it would vibrate even at idle also.

However, since its happening after the ignition is switched off, I would first troubleshoot with MAF, Throttle body and finally the injectors. In the same sequence.

Did you try to slot OBD scanner ? It might throw some fuel related error codes.

Request you to check the videos which I have linked. It does seem that the radiator fan isn't functioning properly.

Originally Posted by Omkar

Engine mounts are covered under the warranty in most cases. Better check with the service centre.



+1, the fan also stays on if the coolant level is low.



Agreed. If it's engine mount, you will notice the increased vibrations on the steering wheel and pedals. An OBD scanner would surely help shed some light. Could be some electrical issue as well.

I checked the coolant level and the oil level and they are both at an adequate level. Request you to check the videos which I have linked. It does seem that the radiator fan isn't functioning properly.

Originally Posted by svsantosh

First time in my life I am hearing this observation. Dont worry, not possible. Engine wont run after you switch off the car.


Did you check the fan? The fans usually run for a good 5-20 seconds in cars after you turn off the engine. It is upto the ECU to decide if it should or should not. Diesel or Petrol irrespective.

Request you to check the videos which I have linked. It does seem that the radiator fan isn't functioning properly.

Originally Posted by svsantosh

Check the silencer from the header to the tip. When cold, stand below the car (under a hoist) and punch the car with your fist. You will most likely see a torn rubber boot or mount. While at it, check for anything else suspect below the car.

Could you please elaborate on this?


So, while switching off my car today after reaching my workplace, I opened the window and observed the sound from the engine bay after switching off the car and the comments about the radiator fan started to make more sense. After reaching home, I recorded 2 videos of the same.

Part 1-

Engine running but with a distinct rattling sound-

https://youtu.be/BqmCGb-DXrQ

Part 2-

Radiator fan sound after switching off the engine-

https://youtu.be/6Sg-qZTZZ1g

After looking at the videos, what's your opinion guys? As most of you had pointed out, it does seem like the radiator fan. I checked the extended warranty coverage list and it does seem that the radiator fan is covered. Have scheduled a visit to the service centre for tomorrow.

[x-o-b]

Originally Posted by x-o-b

I think this is normal, my Mahindra Bolero Pick-up 4X4 also does the same - has been that way ever since I bought it years ago.

After watching your video, I realized that your case isn't the same as mine. Mine only shakes for a second but your seems to run for a few seconds longer.

[tharian]

Yes, it does seem to be the radiator fan. If you notice, the AC pipe shakes along with it after the engine is turned off. That AC pipe is located right behind the fan and probably bolted to the same fan shroud.

[gaurav.kokra]

Get your radiator fan checked. I feel it is hitting something or it might have gotten loose/out of orientation.

The only thing moving after you switch off your car is your radiator fan.

And the way the sound goes away is very similar to a fan loosing speed while hitting something.

[Raghu M]

Originally Posted by toiingg

Are you sure it is the engine and not the radiator fan ?

Fords sometimes have the fan stay on even after the engine is switched off for sometime in order to cool off the coolant. Same with Fiats.

Add M&M to the list too. The other day I had my 3OO's fan turn on after switching off the ignition. Mine is petrol.

[VijayAnand1]

This issue can be either a failing radiator fan or a failed radiator support rubber grommets (On the Figo, there are rubber grommets) underneath the radiator on which the radiator mounts/sits to prevent itself from moving and vibrating. If these rubber grommets are cut, the radiator would vibrate and this would be pronounced when the fan gets turned on. Get your fan assy and the radiator/bottom support grommets checked at your SVC, pretty much easy fix. Good luck.

Cheers!
VJ

[Indian2003]

Originally Posted by AYP

Hello everyone,

I own a 2017 Figo diesel which has run 34,500 kms. Since the past few days, I have observed that after I switch off the car, the engine keeps vibrating for a few seconds. When I say vibrate, I mean that it feels that the engine is basically running even after the car is switched off. I do not hear the sound of the engine, but I can feel the vibrations which lasts for 2-3 seconds. This generally happens only after a long drive. What could be the reason(s) for this?

This is caused by carbon deposits on the pistons or other hot spots in the combustion chamber. This was very common in high mileage cars before. The engine could run very roughly for a few seconds after being switched off.
Your problem is in the combustion chamber and the only cure is to get rid of the carbon deposits and adjust the fuel and ignition.

[AYP]

I finally got the Radiator fan, radiator motor and the shroud replaced under extended warranty. The damage to the wallet without EW would have been around 5k(including the labour). Thank you all for the response.