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Nailing down the cause of my vibrating engine on tdi


Rickpercy87
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I'm preparing my 2002 1.4 tdi to be sold but I am trying to sort the vibrating issue with the engine. The engine visible shakes at idle but goes away at around 1300 rpm. The gearstick rattles a fair bit aswell and the vibrating is worse when pulling away

I have had the dogbone mount out and it appears to be in very good condition, no tears or anything.

Iv'e cleaned the MAF with electrical contact cleaner.

The Passenger side mount which connects to the transmission (my car is right hand drive) does have some play and could be torn a little but I cannot see very well even with the battery and battery tray removed. I am going to remove this tomorrow and have a proper look. I can pry this mount with a pry bar and it moves quite a lot fairly easily. Not sure if it is supposed to. Also I can move the engine maybe 1mm up and 1mm down when I rock it by hand.

One thing which does concern me is I can hear my balance shaft chain, at least I think I can. When I drive near a wall with the window down I can hear it very clearly. Even at idle I can hear it too. What is involved in properly diagnosing and fixing this? It seems a rare occurrence and i'm struggling to find information on it for this car or the 1.9tdi's.

Could this be done DIY? Is it just the chain that will need replacing?

Any help will be greatly appreciated

Edited by Rickpercy87
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Not really got an answer for you but our TDI is pretty much the same - I am sure I read somewhere that the TDIs are known to be fairly hard on the engine mounts due to the torque they have. Our car has done well over 100k and now has a fair bit of judder pulling away.

Replacing both engine mounts plus the dogbone mount would add up to a fair bit of cash so am not willing to do it unless I was certain it would cure the problem. Hope you manage to get it sorted.

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Not really got an answer for you but our TDI is pretty much the same - I am sure I read somewhere that the TDIs are known to be fairly hard on the engine mounts due to the torque they have. Our car has done well over 100k and now has a fair bit of judder pulling away. Replacing both engine mounts plus the dogbone mount would add up to a fair bit of cash so am not willing to do it unless I was certain it would cure the problem. Hope you manage to get it sorted.

The dog bone is certainly fine. I'll have the other two out Saturday if the weather is nice and give them a good look over. It just concerns me that I can hear a chain. Been doing alot of reading on it and I did find some information here and there on other cars. Look ridiculously hard to change parts concerning the balance shaft and about 4 or 5 special tools are needed. I'm going to check the balance shaft chain and pray that it just needs a new chain and the sprocket or chain guide isn't worn. I'll get some pictures.

Cheers

Edited by Rickpercy87
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How many miles has the car done? There is no timing chain noise on our Lupo but it does have a distinct rattle from the EGR valve which I intend to check as soon as I can find time. If you take the engine mounts out remember that some of the bolts are stretch bolts which should not be re-used. I believe that Rich has rebuilt a TDI engine so hopefully he can give some advice.

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How many miles has the car done? There is no timing chain noise on our Lupo but it does have a distinct rattle from the EGR valve which I intend to check as soon as I can find time. If you take the engine mounts out remember that some of the bolts are stretch bolts which should not be re-used. I believe that Rich has rebuilt a TDI engine so hopefully he can give some advice.

Cheers for the info on the bolts. I didn't realise. Never had time today to remove them anyhow. Busy with the golf. All sorted now so tomorrow the the arosa gets my attention..

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  • 5 months later...

Iv'e tried everything to diagnose the rattle. It does seem to be the balance shaft chain, I can hear it distinctly now. I can't find much information on the internet regarding even looking at the balance shaft chain. I already have another car now so I can leave this off the road and consider it a project to get it running smooth again.

Does anyone know where I should start with this? Any documentation or the like? I really just want to get a good look at it for now and see how bad it is.

Can't wait to get started!

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Can not help as I have never had to strip down the motor on our TDI - it is now on 106k and is running well other than the rattle from the EGR valve.

Best bet would be to call at an independent VW specialist and ask them for an opinion as it is easy to get involved in lots of unnecessary work when the cause is something entirely different (I have made this mistake myself in the past)

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  • 1 year later...

I know this a year old, but i've been looking into this today as the 3 pot tdi can have issues like sudden chain failure with potentially catastrophic results. This is bothering me as I am intending on getting much more power out of mine. Any scraping noise coming from the sump pan area should be taken as a sign of imminent failure.

Here's the components on the 1.4 tdi:

http://workshop-manuals.com/skoda/fabia-mk1/power_unit/1.4/51;_55;_59_kw_tdi_pd_engine/engine_lubrication/removing_and_installing_parts_of_the_lubrication_system/balancing_shaft_and_retaining_frame_summary_of_components/

 

Here's the removal replacement procedure, pretty sure it will be much the same on Lupo:

http://workshop-manuals.com/skoda/fabia-mk1/power_unit/1.4/51;_55;_59_kw_tdi_pd_engine/engine_lubrication/removing_and_installing_parts_of_the_lubrication_system/balancing_shaft_and_retaining_frame_summary_of_components/removing_and_installing_balancing_shaft/

The febi chain and tensioner kit is about £90.

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