What balance shaft do?

The engine is vibrating and the balance shaft is reduced vibration, shafts rotate in the opposing direction to each other at twice the engine speed and have timing marks as well, and the shaft is eccentrically weighted. That model 2 shaft has in 1 unit and is located under the crankshaft.

Balance shaft unit with gears

If the balance shaft is failing probably you can notice a rattle or knocking noise on idle these are the first symptoms, after driving for a long period that a possible loss of oil pressure and the broken gears make more damage like a snap chain.

Replace or delete?

Yes, both are working but the difference is the price of replacing the cost is huge and the problem is still coming back later the miles are so much better to remove the balance shaft unit if no more damage, so before need to look around properly. I have done this a lot of years back without any problem some vehicles run over 100,000 miles.

How to remove and what to check.

First, drain the engine oil and remove the oil filter, after that remove the sump and we can see this beautiful balance shaft unit.

Number 1 is the balance shaft unit just unbolt the 4 outler bolts but be careful because is full of oil.

Number 2 you can see how wear and tear just remove with the 2 bolts.

Number 3 is important you can see the gear teeth just turn around the engine by hand and check the teeth for any damage, personally I use brake cleaner to clean down the oil better to see if no any damage is a happy day, just let like this and put back the sump, if you see damage need to remove the side cover what is not a really great job. What I see the worst damage here in the picture:

Here the engine block is damaged timing side of the engine the hole is oval
The gear teeth is damaged
The gear cover is broken

So if you need to remove the gear cover because the gears are damaged you need to block the oil line for that you can see in the picture marked with a red circle clean out the hole and put the lock tide I’m using 6mm copper washer as well on the bolt:

and 1 more oil feed hole needs to block for the balance shaft unit

When you put back the side cover and the sump just choose the proper sealant /liquid gasket / otherwise, the engine oil just keeps leaking normally I’m just let to dry minimum 12 hours before filling up with new engine oil.

Recommended liquid sealant is MMC part number MZ320771 is come from Threebond 1207F.


Cornel · February 25, 2023 at 10:25 am

Hello,please tell me what do i have to remove in order to delete? Thank you!

    admin · February 27, 2023 at 11:52 pm

    Do you have any experience?

Andy · April 27, 2023 at 7:17 pm

If I don’t need te remove part market 1 in picture, I must block hole nr 2? I don’t see the sense.

    admin · May 1, 2023 at 10:00 pm

    If you don’t remove the balance shaft unit or the timing gears then not required to block the oil feed holes just when remove the the balance unit or timing gears you can see the 6mm oil feed hole.

Andy · May 2, 2023 at 7:08 pm

I did exactly like this couple of days ago, I kept the balance shaft unit and blocked only first oil line.

    Rodney · June 6, 2023 at 12:02 pm

    Hi Andy – once you removed what are the main differences? Less noise , any vibration? Why is a balancer shaft fitted in first place?

Costin · June 6, 2023 at 9:38 am

Hello, many thanks for the advice, I went for the replacement of the balancer shaft and coupling cube on my Outlander diesel 13 plate. However the tech who did the work didn’t seal the back cover / sump properly so I am getting an oil leak – is not major but the stain is obvious under the car. So I will have to go back for a reseal.
What sealant would you recommend? Many thanks

    admin · June 9, 2023 at 3:05 pm

    Recommended sealant is MZ320771 is come from Threebond 1207F

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