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E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

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  #1  
Old 01-10-2012, 06:55 PM
wqqdy wqqdy is offline
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Location: Kentucky
 
Join Date: Jan 2012
Posts: 3
Mein Auto: Z4
Z4 Intake Explosion!

Started to leave work today..... when I cranked the Z4 at a cold start there was a loud pop in the engine bay and smoke rolled from under the hood. It started but idled rough. I popped the hood to find the plastic intake cracked from the backfire. Any idea why this happened? Wondering what the repair cost will set me back?

The Z4 is a 2005 with the 3.0. The outside temp was mid 40s.
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  #2  
Old 01-11-2012, 02:57 PM
wqqdy wqqdy is offline
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Location: Kentucky
 
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Mein Auto: Z4
Off to the shop

Go it on the rollback today and off to the shop. Wondering if it jumped time. Would that be unusal at 80K for the 3.0
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  #3  
Old 01-11-2012, 03:33 PM
pokeybritches pokeybritches is offline
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Location: Gulf Coast
 
Join Date: Jan 2008
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Mein Auto: 06 Z4MR, 03 Z4 3.0i
Did you get a "Service Engine Soon" light? If so, pull the codes and post them. Autozone can usually do this for you.
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  #4  
Old 01-11-2012, 04:03 PM
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jmanscotch jmanscotch is offline
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Location: Colorado Springs
 
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Mein Auto: '09 135 - 6MT - TwinTs
Wow, interesting....

No, the timing chain is probably one of the most bullet proof sections of the M54 engine...would be very suprised to hear that is the issue.

I'm not sure if I'm even in the right ballpark here, but maybe read up on the oil separator. Though it probably hasn't been in the freezing temps in Kentucky lately (notably, your reference to mid 40s), so that probably mutes my random thought on the matter...
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2004 325Ci - 5MT - SOLD & MISSED
2003 3.0 Z4 - 6MT - SOLD
1967 1602 - 4MT - STOLEN
2008 328XI - 6MT - EX STOLE
1995 325i - RUSTED AWAY
2009 135i - COPS IMPOUNDING

Last edited by jmanscotch; 01-11-2012 at 04:05 PM.
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  #5  
Old 01-12-2012, 03:46 AM
wqqdy wqqdy is offline
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Location: Kentucky
 
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Mein Auto: Z4
Didn't realize the M54 had a chain instead of a belt. I too will be surprised if that is the issue. On the oil separator if freezing conditions are required it was too warm that day. When I looked at the oil serator issues the repair cost were pretty spooky. It will be interesting to see what the issue was here. I saw some similar on other sites and they were talking about the O2 sensor and MAF. What ever the issue it was enough pressure in the ignition to split the intake at the seams.
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