VANOS Removal Issues

TheDan

Active member
 Warwick, UK
Hey all,

Been trying to remove my VANOS this morning and it appears I have managed to round the 8mm allen bolt for the piston caps.

As there is such limited space, I can't get a typical bolt remover on it.

What would you guys advise?
 
A low profile easy-out extractor may do the job, left-hand screw in the correct extractor, it bites and hopefully drama over :thumbsup:
51Y0Xo8NnZS._AC_.jpg
https://www.amazon.co.uk/LANNIU-Extractor-Multi-Spline-Premium-Rounded/dp/B07YD2V1M7/ref=asc_df_B07YD2V1M7/?tag=googshopuk-21&linkCode=df0&hvadid=399647037248&hvpos=&hvnetw=g&hvrand=5582432012739989080&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006563&hvtargid=pla-841358584547&psc=1&tag=&ref=&adgrpid=85427415979&hvpone=&hvptwo=&hvadid=399647037248&hvpos=&hvnetw=g&hvrand=5582432012739989080&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006563&hvtargid=pla-841358584547
 
TheDan said:
Hey all,

Been trying to remove my VANOS this morning and it appears I have managed to round the 8mm allen bolt for the piston caps.

As there is such limited space, I can't get a typical bolt remover on it.

What would you guys advise?
Apologies for teaching you to suck eggs, but you do know they're a left-hand thread?
 
enuff_zed said:
TheDan said:
Hey all,

Been trying to remove my VANOS this morning and it appears I have managed to round the 8mm allen bolt for the piston caps.

As there is such limited space, I can't get a typical bolt remover on it.

What would you guys advise?
Apologies for teaching you to suck eggs, but you do know they're a left-hand thread?
Aren’t the covers, with 8mm allen, just ordinary right hand threaded? And the plastic caps just pull out, and underneath them the splined shaft piston bolts Torx 30 left hand threaded.
https://www.beisansystems.com/procedures/vanos_procedure.htm
On mine the covers were really tight so cracking them open with an extractor may be challenging.
 
Yeah the covers are normal thread and the bolts underneath are LH thread. I heard the covers were tight to crack off, but damn!!

I think I'll have to grab a good set of bolt extractors (my set is too small) and try again tomorrow.

Thanks for the advice though guys! :)
 
TheDan said:
Yeah the covers are normal thread and the bolts underneath are LH thread. I heard the covers were tight to crack off, but damn!!

I think I'll have to grab a good set of bolt extractors (my set is too small) and try again tomorrow.

Thanks for the advice though guys! :)
My mistake. Didn't realise which bits you meant.
Do you have replacement covers?
I have some spares but will take a day or two to reach you.

The plastic bungs pull out with long-nosed pliers, but the easiest way to refit them is to find a socket the same size, little dab of grease to hold the cover on the socket, push it into the hole and knock it straight home.
 
I’ve nearly done the same in the past by not getting the Allen head seated properly

What tool are you using and is it completely rounded?

They are on with some torque- I usually use a breaker bar

Stuart
 
Yep, lucky the X8R kit comes with spare covers (phew!).

Thankfully I managed to get it off with a combination of breaker bar + hammering in a larger Torx bit.

I was in the process of removing the front end so I could get a drill at it, but fortunately I got it off before having to remove the front cross brace entirely. The extra space meant the VANOS just slid off with none of the normal Z4 VANOS access issues!! :D

Replacing the seals and needle bearings (why not since I've come this far) now and will put it all back together in the morning.

PXL_20220709_173105273.jpg

"Perseverance is stubbornness with a purpose."
 
TheDan said:
Yep, lucky the X8R kit comes with spare covers (phew!).

Thankfully I managed to get it off with a combination of breaker bar + hammering in a larger Torx bit.

I was in the process of removing the front end so I could get a drill at it, but fortunately I got it off before having to remove the front cross brace entirely. The extra space meant the VANOS just slid off with none of the normal Z4 VANOS access issues!! :D

Replacing the seals and needle bearings (why not since I've come this far) now and will put it all back together in the morning.

PXL_20220709_173105273.jpg

"Perseverance is stubbornness with a purpose."

Well done mate- that’s working the problem in action

Why not have a beer to cool off
 
bigwinn said:
Well done mate- that’s working the problem in action

Why not have a beer to cool off

One step ahead of you! :cheers:
 

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