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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 04-09-2014, 11:10 PM
theloony1 theloony1 is offline
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Location: new zeland
 
Join Date: Feb 2014
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Mein Auto: bmw 520i
Unhappy carbon build up

hello again.
I just replaced the valve cover or rocker cover gaskets on my 2000 e39 2.2l petrol.
When I looked under the valve cover there was carbon build up is this ok to see or am I doomed. Also in the crappy plastic cover there was a 2 inch crack which I have sealed up for now until I can get a replacement. Just to confirm the car runs great no issues apart from the rough idle hence why I done the gaskets and rough idle has disappeared since doing the gaskets.
Anyway back to the question is it normal for carbon build up under the cover.
THANKS in advance for reply's
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  #2  
Old 04-09-2014, 11:49 PM
edjack edjack is offline
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Mein Auto: '97 540i 6 speed
I would not expect to see carbon buildup on the top of the cylinder head. That requires a VERY HIGH temperature to create it.

Do you mean sludge?
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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  #3  
Old 04-10-2014, 12:23 AM
theloony1 theloony1 is offline
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it was a kind of oily black sludge and when I cleaned it bit by bit it was flakey underneath like it had dried
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  #4  
Old 04-10-2014, 09:20 AM
edjack edjack is offline
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Sounds like more frequent oil changes are in order. Have you had this car for years? If so, what is your driving regime, and how often do you change oil?

Consider a couple of Rislone treatments.
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

Last edited by edjack; 04-10-2014 at 09:21 AM.
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  #5  
Old 04-10-2014, 02:10 PM
theloony1 theloony1 is offline
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Location: new zeland
 
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i got the car a month ago knowing it had some problems most of them fixed now will do oil change next . was driven 30 ks a day it needs a good run .
was just worried something was going to die on me ive never seen that much gunk under a rocker cover before.
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  #6  
Old 04-10-2014, 02:24 PM
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eparayno eparayno is online now
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Mein Auto: 2001 530i
Probably due to short trips and long intervals between oil changes. Might want to try Rislone or Seafoam treatments. But as edjack mentioned change the oil on time and it won't happen again
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