E90Post
 


 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Is Valvetronic and Vanos part of the Cylinder Head?



Reply
 
Thread Tools Search this Thread
      11-10-2012, 07:14 AM   #1
autoque
Private
 
Drives: '08 X5 3.0si
Join Date: Mar 2010
Location: Outside NA

Posts: 89
iTrader: (0)

Question Is Valvetronic and Vanos part of the Cylinder Head?

I'm curious if I can just replace the valvetronic and vanos units or if the whole cylinder head must be replaced to be able to change the valvetronic/vanos.

And what are the parts cost like without the labor? realoem does not list the parts separately. They only list the price of the cylinder head with the valvetronic and vanos.
autoque is offline  
0
Reply With Quote
      11-10-2012, 01:30 PM   #2
Efthreeoh
Brigadier General
 
Drives: E90
Join Date: May 2012
Location: MARLAND

Posts: 3,452
iTrader: (0)

Go back to real OEM and search on this P/N 11377548388 (valvetronic actuator). You'll find the correct schematic and P/N list for the VANOS and Valvetronic parts.
Efthreeoh is offline   United_States
0
Reply With Quote
      11-10-2012, 02:21 PM   #3
ctuna
Brigadier General
 
Drives: 325xi 06 wagon MT
Join Date: Jan 2010
Location: Santa Cruz, Ca

Posts: 4,234
iTrader: (0)

Are they bad in your car?

Are they bad in your car?
Typical thing that goes wrong with these is dirty vanos solenoids.
And as described in the DIY's they just need to be cleaned and reversed between intake and exhaust.
ctuna is offline  
0
Reply With Quote
      11-10-2012, 02:22 PM   #4
galahad05
Colonel
 
galahad05's Avatar
 
Drives: 335i Sedan
Join Date: Mar 2008
Location: Long Island NY

Posts: 2,479
iTrader: (0)

Question: What are the "typical" symptoms of dirty vanos solenoids? How would I know?
__________________
Always laugh when you can. It is cheap medicine
--Lord Byron
galahad05 is offline  
0
Reply With Quote
      11-10-2012, 06:29 PM   #5
autoque
Private
 
Drives: '08 X5 3.0si
Join Date: Mar 2010
Location: Outside NA

Posts: 89
iTrader: (0)

Quote:
Originally Posted by ctuna View Post
Are they bad in your car?
Not quite sure, even after more than three years of trips to various dealers and master techs, no one knows what's wrong.

I've got a warm start rough idle which lasts one to two minutes after the ignition. This started right after replacing the cylinder head under warranty for a tapping noise, a well known issue in the N52 engine. They changed the spark plugs, coils, MAF and cleaned various parts, tuned up the timing of the valves, disassembled and reassembled, the symptom got a little better, but never disappeared. So my final desperate move, throw expensive parts at it, especially suspicious is the cylinder head unit, which started this long painful journey. I'm out of warranty so I'm picking up the tab, but the dealer's willing to forgo the labor cost since they know I've been having this problem early on. However the dealer doesn't know whether the replacement will lead to fixing the problem as their diagnostic device tells nothing's wrong.

The whole head costs like over $5000 so I thought replacing the valvetronic and vanos is more sensible to a rough idle problem. By the way, absolutely no fault code stored except a code was found about a month ago indicating an error with the vanos solenoid valve, so the dealer replaced it rather than cleaning it and using it again, hoping it would solve the problem. But no go.
autoque is offline  
0
Reply With Quote
      11-11-2012, 07:29 AM   #6
Efthreeoh
Brigadier General
 
Drives: E90
Join Date: May 2012
Location: MARLAND

Posts: 3,452
iTrader: (0)

Sounds like a bad valvetronic sensor to me.
Efthreeoh is offline   United_States
0
Reply With Quote
      11-12-2012, 05:39 AM   #7
autoque
Private
 
Drives: '08 X5 3.0si
Join Date: Mar 2010
Location: Outside NA

Posts: 89
iTrader: (0)

Quote:
Originally Posted by Efthreeoh View Post
Sounds like a bad valvetronic sensor to me.
You mean the eccentric shaft sensor? Hmm, I thought about it and searched for others' symptoms but they have drivability issues whereas my vehicle's issue disappears within one to two minutes of warm engine start.
autoque is offline  
0
Reply With Quote
      11-21-2012, 06:33 AM   #8
autoque
Private
 
Drives: '08 X5 3.0si
Join Date: Mar 2010
Location: Outside NA

Posts: 89
iTrader: (0)

Quote:
Originally Posted by Efthreeoh View Post
Sounds like a bad valvetronic sensor to me.
Could you elaborate on the valvetronic sensor?
autoque is offline  
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 08:34 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST