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Keja2810 Profile
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Date Registered: 07-2012
TOTAL POSTS: 19
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Bad vibration under load


G'day everyone, I have a 2004 ST T30 petrol auto thats done a lots of kilometres but I have done heaps of regular servicing and maintenance to it also. Recently I replaced a head gasket, had the head reconditioned and all the good stuff that goes with that project.
Before the head gasket blew the car started to vibrate when driven, that is to say it vibrates thru the body and floor (feels like its more from the LH side) of the car from about 20kms per hour. When parked and at idle she runs smooth and quiet, at any rev range all is normal and smooth.
Since getting her back on the road from the head gasket job, the vibration is progressively getting worse as at 50kms an hour it shakes the dashboard so hard you worry it will fall apart.
So now she's home in the drive way while I work out what to do next. For the record there is no vibration sensation in the steering at all, wheels are all balanced. About 500kms back I had the cv joints and front hubs and bearings replaced , so that area is all good too.
I have read pages and pages here in the forum on vibration but don't see this same issue. Any help full suggestions welcome.

Last edited by Keja2810, 27/Aug/2014, 6:33 am


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Kent, keja2810
2004 ST T30
26/Aug/2014, 12:30 pm Link to this post Send Email PM   Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re:


Engine mount/s?

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26/Aug/2014, 1:09 pm Link to this post Send Private Message MSN Blog
 
Keja2810 Profile
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Date Registered: 07-2012
TOTAL POSTS: 19
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Re: Bad engine vibration under load


Hi Jalal,
should of mentioned I replaced all the engine mounts about 4000 kms ago.
Cheers,
Kent

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Kent, keja2810
2004 ST T30
26/Aug/2014, 1:33 pm Link to this post Send Email PM   Send Private Message Blog
 
Keja2810 Profile
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Date Registered: 07-2012
TOTAL POSTS: 19
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Re: bad vibration under load


Hi Jalal,
Im wondering if you or anyone else has any ideas? I cant recall the cam or crank sensors ever being replaced, do you think this could be a solution? I rechecked the engine mounts this morning and under load they are fine. I have however been using crappy fuel too, never thought about this until I was reading the forum yesterday, so Im going to put some fuel additive and high octane fuel in today and see what happens. I will probably change the fuel filter now too after reading about hose issues as well. Im not fully convinced its the engine but the auto tranny was completely rebuilt 18 months ago and it behaves fine when driving. Struggling for ideas I guess.

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Kent, keja2810
2004 ST T30
27/Aug/2014, 9:53 am Link to this post Send Email PM   Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re:


Although I doubt it is the Crank and CAM sensors, it is worth replacing them both as they can stop working any time now and the same applies for the fuel filter is your mileage is over 100,000kms, as it needs to be changed every 100K.

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27/Aug/2014, 10:50 am Link to this post Send Private Message MSN Blog
 
Keja2810 Profile
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Date Registered: 07-2012
TOTAL POSTS: 19
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Re: Bad vibration under load


Hi Again,
the XTrail was my ex company vehicle and it now has over 400,000 kms on it. I got it for nothing and knew it had been meticulously maintained.

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Kent, keja2810
2004 ST T30
27/Aug/2014, 11:32 am Link to this post Send Email PM   Send Private Message Blog
 
Toddyh03 Profile
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Date Registered: 08-2011
Location: Lalor Park, NSW
TOTAL POSTS: 1663
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Re: Bad vibration under load


My guess would be transmission mounts or rear suspension. Rear suspension issues can often feel like they are coming from the front of the car.

Try putting it in Auto or Lock mode to see if sending drive to the rear wheels makes any difference.

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Toddyh X-2048 (c)
New: Challenger
Old: 2010 T31 Diesel modified
My XTrail
27/Aug/2014, 11:33 am Link to this post Send Email PM   Send Private Message Blog
 
Keja2810 Profile
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Date Registered: 07-2012
TOTAL POSTS: 19
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Re: Bad vibration under load


G'day Toddyh.
I had time today to check the difference in 2WD and 4WD and LOCK. The results are the vibration is twice as bad in 2WD than in the other modes. So driving in 4WD was far better but at 80km/hr the shudder was so bad I had to back off before something broke.
The suspension shocks and coils are old man emu fitted about 15 months ago at ARB, and I have given them a good looking over and they still seem fine.
I did notice that the front left hand side bottom wishbone (may be wrong term) connection has a large rubber bush towards the rear of the car and a more forward bush nearer the transmission. I think this forward bush may be gone as I can kinda see inside from one side and it looks very metal on metal.
I didn't have much luck with the transmission mounting as I don't know how to test the transmission mount, any thoughts or pics on how to do this?
Cheers.
Kent.

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Kent, keja2810
2004 ST T30
28/Aug/2014, 3:09 pm Link to this post Send Email PM   Send Private Message Blog
 
Toddyh03 Profile
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Date Registered: 08-2011
Location: Lalor Park, NSW
TOTAL POSTS: 1663
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Re: Bad vibration under load


Sorry can't help you there as I no longer own an X-Trail. The fact that sending drive to the rear wheels makes it better to drive makes me lean towards transmission mounts but I wouldn't completely discount rear suspension just yet.
Also worth noting that above 80km/h the car will revert back to 2wd.

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Toddyh X-2048 (c)
New: Challenger
Old: 2010 T31 Diesel modified
My XTrail
28/Aug/2014, 3:20 pm Link to this post Send Email PM   Send Private Message Blog
 
skidro Profile
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Date Registered: 05-2012
TOTAL POSTS: 13
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Re:


Could it be something with the wheels? Wheel weights? Does the car drive straight still?

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05 X trail - 5 speed
29/Aug/2014, 2:32 am Link to this post Send Email PM   Send Private Message Blog
 


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