N55 sounds a little tappy - UPDATE - NOW FIXED!!!!

GAB0 · 03-02-2021, 08:25 AM

Quote:

Originally Posted by ChrisSmith335i

Results back from the lab, nothing to indicate an issue with regards to wear so i guess that's something

That's great news! Congrats

ChrisSmith335i · 03-27-2021, 08:49 AM

OK so fully repaired now

One of the HVA's had collapsed..

Had all 24 replaced with new ones

My wallet is £1400 lighter but the car sounds as it should now

BEFORE:

https://streamable.com/nvwcwr

AFTER:

https://streamable.com/zmqqbe

thejeremyman9 · 03-27-2021, 01:09 PM

Quote:

Originally Posted by ChrisSmith335i

OK so fully repaired now

One of the HVA's had collapsed..

Had all 24 replaced with new ones

My wallet is £1400 lighter but the car sounds as it should now

BEFORE:

https://streamable.com/nvwcwr

AFTER:

https://streamable.com/zmqqbe

Nice, curious how they ended up diagnosing that?

ChrisSmith335i · 03-27-2021, 01:14 PM

Quote:

Originally Posted by thejeremyman9

Nice, curious how they ended up diagnosing that?

Went to a BMW specialist, Guys said it sounded mechanical for sure so they took the valve cover off and inspected everything, they inspected the HVA’s and you could see one was collapsed and another wasn’t quite springing back 100%. Replaced all now so one less thing to worry about.

cfm56d7b · 03-27-2021, 05:48 PM

Quote:

Originally Posted by ChrisSmith335i

OK so fully repaired now

One of the HVA's had collapsed..

Had all 24 replaced with new ones

My wallet is £1400 lighter but the car sounds as it should now

BEFORE:

https://streamable.com/nvwcwr

AFTER:

https://streamable.com/zmqqbe

Although the repair was a bit pricey, at least the root cause was properly diagnosed. Glad all is well.

harkes · 03-28-2021, 09:04 PM

Beautiful! Thanks a lot for the update.

badbread · 03-29-2021, 05:57 PM

What's an HVA?

thejeremyman9 · 03-29-2021, 07:09 PM

Quote:

Originally Posted by badbread

What's an HVA?

Hydraulic Valve Actuator (what he shows in the pictures)

https://bimmerprofs.com/valvetronic-and-hva/

03-27-2021, 08:49 AM	#24
ChrisSmith335i New Member 17 Rep 24 Posts Drives: 355i Join Date: Feb 2021 Location: UK iTrader: (0)	OK so fully repaired now One of the HVA's had collapsed.. Had all 24 replaced with new ones My wallet is £1400 lighter but the car sounds as it should now BEFORE: https://streamable.com/nvwcwr AFTER: https://streamable.com/zmqqbe Last edited by ChrisSmith335i; 03-27-2021 at 08:54 AM..
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03-28-2021, 09:04 PM	#28
harkes Colonel 1077 Rep 2,357 Posts Drives: M135i, E39 M5, NSX and AE86 Join Date: Apr 2014 Location: Xiamen, China iTrader: (0)	Beautiful! Thanks a lot for the update. __________________ M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost (A Dane in China)
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03-29-2021, 05:57 PM	#29
badbread not good, but bad 333 Rep 361 Posts Drives: 2013 335i Join Date: Jun 2016 Location: Bay Area, CA iTrader: (3)	What's an HVA? __________________ They are spelled BRAKES not breaks!!!! Oh FFS, not another spark plug thread! BreadsBMW on Youtube
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