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Old 08-09-2013, 03:41 PM
Join Date: May 2013
Location: nj
Posts: 7
Rebel79 is on a distinguished road
Oil in Spark Plug Chamber


I recently changed the plugs on my 06 x5 (x53) and noticed some oil on the first two chambers. The plugs towards the front also had oil on them. I cleaned the chambers and installed new plugs and noticed an increase in MPG and acceleration. Since then (3 months) the acceleration has decreased again and I'm worried the chambers have oil again. Is this is head gasket replacement or something else?

Thanks in advance for your help.
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Old 08-09-2013, 04:03 PM
TiAgX5's Avatar
Join Date: Oct 2010
Location: Coppell,TX
Posts: 3,489
TiAgX5 is on a distinguished road
Replace the valve cover gaskets, the o-rings around the plug openings are allowing oil into the plug area.
'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!
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Old 08-10-2013, 12:57 AM
Gurjit's Avatar
Join Date: Jun 2012
Location: Vancouver
Posts: 495
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u need the spark plug tube seals
they cost me 30$ each and I decided to change them all when I did the valve cover, and I changed the cam position sensor orings and the orings for the electric motors

and did the ccv rubbers at the same time
04 black on sapphire 4.8is personally put 90,000kms
fully loaded minus the fold out trunk floor
-20' DUB X10 3 piece rims staggered setup
-LED angel eyes + interior lights + e70 style shifter
-AFE stage 2 intake system
-x-pipe/resonator delete
-UV coat windshield
-rebuilt Pano roof
-dynavin N6
-all front and rear end suspension parts and both front cv shafts replaced
-OEM hitch

And 2007 GSXR750
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Old 10-05-2013, 10:11 AM
e30cabrio's Avatar
Join Date: Jun 2013
Location: Phoenix Adjacent
Posts: 1,550
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Just changed mine. 7 & 8 were pretty wet. All others bone dry. Put some Right Stuff gasket maker left over from my z motor build. What a pita 8 was to deal with.

Also had fear since they were firmly on coming off, that they would not seat going in.

Car running fine.
BMWCCA # 480346

'72 e6Tii rip
'90 e30iC sold
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acceleration hesitation, head gasket, oil in chamber

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