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E85 / E86 Z4 (2003-2008)
E85 Z4 convertible and E86 Z4 coupe talk with our BMW gurus here.

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  #1  
Old 03-30-2013, 06:11 PM
csmax csmax is offline
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Location: New England
 
Join Date: Mar 2013
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Mein Auto: Mercedes Chevy Ford Toyot
'07 Z4si Vanos or Valvetronic?

Trying to figure out which was used on this car.
Double Vanos or Valvetronic?
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  #2  
Old 03-31-2013, 05:50 AM
csmax csmax is offline
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Mein Auto: Mercedes Chevy Ford Toyot
Does it have/use both systems?
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  #3  
Old 03-31-2013, 06:32 AM
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vintage42 vintage42 is offline
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Location: Louisville, KY
 
Join Date: Jun 2007
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Mein Auto: 1997 BMW Z3 1.9 5MT
I don't know about the 2007, but the current model uses both:
http://www.bmwusa.com/Standard/Conte...and_Specs.aspx
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Old 03-31-2013, 07:18 AM
Jstic Jstic is offline
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Location: CT
 
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Mein Auto: 2006 Z4 3.0i
Both, valvetronic works with double vanos to vary camshaft timing.
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Old 03-31-2013, 08:55 AM
gmushial gmushial is offline
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Mein Auto: 1999 Z3 2.5L
Both: Valvetronic is a replacement for the throttle body, ie, the amount of valve lift is now used to determine/control engine output; and the VANOS is still used to control the timing of valve opening and closing and the relative advance/retard thereof (via the cams).
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  #6  
Old 03-31-2013, 10:39 AM
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shipkiller shipkiller is offline
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Location: Virginia Beach, VA
 
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I did not think the N52 engine uses Valvetronic. I thought only the N54 used it in that model year....

edit: I was completely reversed. The N52 does have Valvetronic and the N54 with turbocharging does not.
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Last edited by shipkiller; 03-31-2013 at 10:47 AM.
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