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Old 16-11-2020, 07:21 PM   #1
Witek
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Default Engine vibration LT 2008 Diesel

Hello,

I have had this car since almost new (bought it as demo). Last few weeks the engine started vibrating so much there is no pleasure in the drive anymore.

Vibrates when idling and when driving. As far as performance, fuel consumption etc goes there is no difference, all runs well. No DTCs.

So, I replaced the engine mounts... but to no effect.

From googling around I maybe need to inspect PCV system.

Can anyone concur? Or suggest anything else I should check?

Cheers.
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Old 16-11-2020, 09:38 PM   #2
GTLEGEND
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Default Re: Engine vibration LT 2008 Diesel

Did you replace the engine mounts with genuine hydraulic units or solid rubber?

Solid rubber usually has the same effect as a broken hydraulic unit..
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Old 17-11-2020, 03:55 PM   #3
Witek
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Default Re: Engine vibration LT 2008 Diesel

yeah, I wouldn't be surprised if I still had a 'broken' one on.

I wasn't aware ther are different types. Is there a way to tell what I have?

Not sure how familiar you are with these cars, but to me it seems that only the right one could come in a hydraulic option? The left (gear box) looks a little to small to be anything other than a solid rubber.
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Old 17-11-2020, 05:37 PM   #4
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Default Re: Engine vibration LT 2008 Diesel

Quote:
Originally Posted by Witek View Post
Hello,

I have had this car since almost new (bought it as demo). Last few weeks the engine started vibrating so much there is no pleasure in the drive anymore.

Vibrates when idling and when driving. As far as performance, fuel consumption etc goes there is no difference, all runs well. No DTCs.

So, I replaced the engine mounts... but to no effect.

From googling around I maybe need to inspect PCV system.

Can anyone concur? Or suggest anything else I should check?

Cheers.
Check harmonic balancer for failed hemisphere rubber..
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Old 20-11-2020, 03:08 PM   #5
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Default Re: Engine vibration LT 2008 Diesel

Just had a bit of a look at it and it doesnt look all that bad to me. All dry and straight.

Since I am running out of ideas, i am thinking of replacing it.
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Old 20-11-2020, 05:18 PM   #6
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Default Re: Engine vibration LT 2008 Diesel

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Originally Posted by Witek View Post
Just had a bit of a look at it and it doesnt look all that bad to me. All dry and straight.

Since I am running out of ideas, i am thinking of replacing it.
test with your fingers, if you poke holes in it....
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Old 20-11-2020, 05:24 PM   #7
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Default Re: Engine vibration LT 2008 Diesel

is it down a cylinder??

use a Pyrometer to measure each cylinder temperature for "COMPLETE" combustion.
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Old 20-11-2020, 06:06 PM   #8
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Default Re: Engine vibration LT 2008 Diesel

This is what the crankshaft pulley looks like



I wouldn't think it is missing a cylinder. It runs normal, just noisy and shaky.

I'll try checking the temperature

hmm.. not showing the picture
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Old 20-11-2020, 07:31 PM   #9
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Default Re: Engine vibration LT 2008 Diesel

most times you can see the crank pulley run out of true while the engine idles. But it is not a positive check for defective pulley
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Old 28-11-2020, 05:46 PM   #10
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Default Re: Engine vibration LT 2008 Diesel

Just changed the pulley... and the vibrations are still there

Looks like I need to take it in for a proper check
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Old 29-11-2020, 07:43 PM   #11
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Default Re: Engine vibration LT 2008 Diesel

One bad fuel injector?
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Old 29-11-2020, 07:49 PM   #12
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Default Re: Engine vibration LT 2008 Diesel

It has crossed my mind, since the pulley excersize.

Wouldn't the engine run poorly in that case? I guess it does already, but performancewise it seems good enough for 200k.

Any good ways to investigate that?
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Old 30-11-2020, 02:21 PM   #13
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Default Re: Engine vibration LT 2008 Diesel

Did you do all the engine mounts? The upper one you can see in the engine bay, the roll restrictor/torque mount on the gearbox and the one under the airbox?

Mine would vibrate the **** out of the dash at idle and the bonnet looked like it was going to shake off its hinges.
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Old 30-11-2020, 05:02 PM   #14
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Default Re: Engine vibration LT 2008 Diesel

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Originally Posted by Franco Cozzo View Post
Did you do all the engine mounts? The upper one you can see in the engine bay, the roll restrictor/torque mount on the gearbox and the one under the airbox?

Mine would vibrate the **** out of the dash at idle and the bonnet looked like it was going to shake off its hinges.
idle speed too low maybe?
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Old 30-11-2020, 10:59 PM   #15
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Default Re: Engine vibration LT 2008 Diesel

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Originally Posted by burnz View Post
idle speed too low maybe?
It'd only do it at idle, the moment you touched the throttle it was smooth as.

Was the engine mounts - replaced all three with OEM ones and away it went, the thing was none of them looked worn or damaged in any way at all
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Old 30-11-2020, 11:28 PM   #16
Witek
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Default Re: Engine vibration LT 2008 Diesel

Mine vibrates at any rpm. But maybe not as much as what you guys experienced.

I replaced all 3 mounts. For the gearbox one I chose the $70 one over a $300 one. And those made no difference
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Old 21-12-2020, 04:16 PM   #17
Witek
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Default Re: Engine vibration LT 2008 Diesel

Looks like @GTLEGEND; was on the money.

I got another right engine mount, out of Ford this time, and it did the trick. And it only cost $40 more that the aftermarket one. I cannot believe how much time (and money) I wasted on this.

Thanks everybody for helping
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Old 21-12-2020, 04:28 PM   #18
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Default Re: Engine vibration LT 2008 Diesel

Quote:
Originally Posted by Witek View Post
Looks like @GTLEGEND; was on the money.

I got another right engine mount, out of Ford this time, and it did the trick. And it only cost $40 more that the aftermarket one. I cannot believe how much time (and money) I wasted on this.

Thanks everybody for helping
As they say "the difference is genuine" and thus why genuine parts are generally a little more expensive because they are built to a specification usually to a Ford spec.

Glad you sorted it out.
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