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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 01-25-2015, 06:15 PM
jrubingh jrubingh is offline
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E83 n52 intake valve cleaning?

Does our intake valves in this engine need cleaning via walnut shell blasting?
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  #2  
Old 01-25-2015, 06:31 PM
swampX3 swampX3 is offline
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turbo motors ????...the 54 and 55 are the main carbon culprits

http://www.google.com/url?sa=t&rct=j...84349003,d.eXY
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Old 01-25-2015, 06:34 PM
swampX3 swampX3 is offline
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not the 52 engine ...but many direct injection engines suffer

With all of this "good" going on for direct injection's use on gasoline 4-stroke engines, there are some potential drawbacks. Since the fuel is being injected directly into the cylinder's combustion chamber, the intake runners, cylinder head intake ports and the intake valves are only bathed with air. In other words, unlike engines with standard fuel injection systems, the ports and intake valves are dry. At least, that's the idea.
Depending on the design and efficiency of the crankcase ventilation system (or, Positive Crankcase Ventilation, PCV), some amount of oil vapor will be introduced into the intake manifold, cylinder head intake ports and the intake valves. When this oil vapor hits the hot cylinder head intake ports and the intake valves, it burns and sticks to the surfaces.

ps ...there are some good after market catch cans for some of the system oil that gums/carbons up the intake valves etc....not perfect but helpful

Last edited by swampX3; 01-25-2015 at 06:36 PM.
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Old 01-25-2015, 07:11 PM
jrubingh jrubingh is offline
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Thanks. I'm asking because of the N52 engine. I find references to other engines but not the N52, non-turbo 6 cyl in a 2007 X3 3.0si
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  #5  
Old 01-26-2015, 05:36 AM
swampX3 swampX3 is offline
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direct injection

when you see direct injection you see carbon .....on the big recips we work on ....mostly marine ...they have been direct injected for decades ....we shoot some steam in the inlet to try and keep the carbon down ....we often have to use one inch power chisels to get the carbon off !....it builds up much quicker with dirty diesel/nat gas
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Old 01-29-2015, 04:46 PM
x3brian x3brian is offline
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E83 n52 intake valve cleaning?

Quote:
Originally Posted by jrubingh View Post
Thanks. I'm asking because of the N52 engine. I find references to other engines but not the N52, non-turbo 6 cyl in a 2007 X3 3.0si

I have only heard this is an issue in the turbo n54 version motor due to direct injection. If this was an issue we would have heard about it by now...

Plus...the n52 doesn't have direct injection. It uses valvetronic and regular injection.

I'm at 165k on my 09 and it still runs like the day I drove it home with 2 miles on the ODO. You should be fine.

Last edited by x3brian; 01-29-2015 at 04:51 PM.
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  #7  
Old 02-02-2015, 09:16 AM
swampX3 swampX3 is offline
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good direct injection/carbon buildup link

http://www.enginebuildermag.com/2015...rbon-deposits/
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