E89 35i rocker box cover oil leak into plugs

Rich777 · Post by **Rich777** » Mon Jan 24, 2022 2:36 pm

Hi again I should have added this to my original post.
I also have a oil leak into one of my spark plugs and need a new rocker box cover can anyone enlighten me to the costs involved main dealer vs independent thanks everyone.

tiglon · Post by **tiglon** » Mon Jan 24, 2022 4:19 pm

My local dealer did the rocker cover gasket for just under £500 a few weeks ago. Didn't get a quote from an Indy because their lead times were all too long for me.

Rich777 · Post by **Rich777** » Mon Jan 24, 2022 4:26 pm

Thanks for your reply my quote was £770 for the new rocker box cover with the gasket built in and all genuine parts.
I wonder what the main dealer would charge. Rich

tiglon · Post by **tiglon** » Mon Jan 24, 2022 4:32 pm

I think the cover itself only costs around £150 and wouldn't require any extra labour, so it sounds like you've found an expensive garage! I would get a few more quotes if I were you.

B21 · Post by **B21** » Mon Jan 24, 2022 4:53 pm

tiglon wrote: ↑Mon Jan 24, 2022 4:32 pm I think the cover itself only costs around £150 and wouldn't require any extra labour, so it sounds like you've found an expensive garage! I would get a few more quotes if I were you.

Love to know where you can get a genuine BMW cam box cover from for £150?

Please advise

https://www.mlperformance.co.uk/product ... 5i-z4-35is

tiglon · Post by **tiglon** » Mon Jan 24, 2022 5:14 pm

B21 wrote: ↑Mon Jan 24, 2022 4:53 pm
tiglon wrote: ↑Mon Jan 24, 2022 4:32 pm I think the cover itself only costs around £150 and wouldn't require any extra labour, so it sounds like you've found an expensive garage! I would get a few more quotes if I were you.
Love to know where you can get a genuine BMW cam box cover from for £150?

Please advise

https://www.mlperformance.co.uk/product ... 5i-z4-35is

And that's me suitably put in my place for making an error...

B21 · Post by **B21** » Mon Jan 24, 2022 5:18 pm

tiglon wrote: ↑Mon Jan 24, 2022 5:14 pm
B21 wrote: ↑Mon Jan 24, 2022 4:53 pm
tiglon wrote: ↑Mon Jan 24, 2022 4:32 pm I think the cover itself only costs around £150 and wouldn't require any extra labour, so it sounds like you've found an expensive garage! I would get a few more quotes if I were you.
Love to know where you can get a genuine BMW cam box cover from for £150?

Please advise

https://www.mlperformance.co.uk/product ... 5i-z4-35is
And that's me suitably put in my place for making an error...

It was not intended as a put down, but trying to assist the OP that maybe the price being charged wasn't as extorniate as he might have been led to believe..no offence intended..

I've just imported one from the US to reduce costs hence my suprise..

Rich777 · Post by **Rich777** » Mon Jan 24, 2022 6:45 pm

Now then now then

well while we're at it I wonder how much the rocker box cover cost from BMW in the UK. I think it has the gasket built in but not sure on that

B21 · Post by **B21** » Mon Jan 24, 2022 6:55 pm

https://bmwsupply.co.uk/part/details?se ... w=btdetail

£391..but you do get a gasket, I think

Rich777 · Post by **Rich777** » Mon Jan 24, 2022 11:49 pm

Jesus

mcbutler · Post by **mcbutler** » Sat Jan 29, 2022 6:46 pm

You dont need to change the cover just because your gasket is leaking!
The cover only requires changing if the inbuilt breather system is blocked and to be honest you could probably wash that out and clear it with petrol or similar solvent.
Also clean the PCV valve

Rich777 · Post by **Rich777** » Sun Jan 30, 2022 12:40 am

High Mark thanks for that. I think you're right. A BMW senior technician said nine times out of 10 you can just change the gasket, Which is what I'm having done.
A general mechanic told me if the cover is warped you need to replace it. We're not talking cylinder heads here, so can't see how plast can be warped and not pulled back down again when you re torque up the bolts. Yes totally agree with you the crack case ventilation built in can be cleaned.

mcbutler · Post by **mcbutler** » Tue Feb 01, 2022 1:09 pm

Rich777 wrote: ↑Sun Jan 30, 2022 12:40 am High Mark thanks for that. I think you're right. A BMW senior technician said nine times out of 10 you can just change the gasket, Which is what I'm having done.
A general mechanic told me if the cover is warped you need to replace it. We're not talking cylinder heads here, so can't see how plast can be warped and not pulled back down again when you re torque up the bolts. Yes totally agree with you the crack case ventilation built in can be cleaned.

The plastic does warp and leak unfortunately, its the same with the DCT gearbox sumps. I had to change a valave cover on my previous car (23i). We removed it when the gasket went and when it was cleaned and placed on a flat surface it rocked around due to a twist in it.
I think its essential to only remove these parts when the engine is nice and cold. If you removed the cover warm it may well warp as it cools down..

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