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E46 Convertible
The E46 vert forum. Talk about dropping your E46 top here.

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Old 02-22-2013, 11:47 AM   #1
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Join Date: Feb 2013
Location: TX
Posts: 3
My Ride: 02 BMW 330Ci
Error Code 1083, 1085 after valve cover gasket change

Hi There,

I recently changed my 02 330CI valve cover gasket and spark plugs (NGK), the process is ok, the only glitch is when I hand tight one of the 4 middle screw, one of them had a click noise so I get scared and did not torque that one. I also use the red rtv sealant on 10 location (should use the black sensor safe one). The second day I did oil change, then I got service engine soon code:

0171, 0174, 1083, 1085. both bank1 and 2 are too lean.

Not sure what I did wrong, I did clean all the old gasket, include the center piece. I think the possible cause could be:

1. The VCG (not oem) did not seat properly, cause vacume leak
2. The red rtv sealant produce fume to foul the oxygen sensor.
3. The oil fill cap is mulfunction.

I did notice that the suction power when I open the oil fill cap is less than before ( it is easy to open, before change it was hard, it has been sucked by the vacume). Also noticed a little rough on cold start idle, the RPM went down quicker with new spark plugs though. ( all torqued to 18Ft Lb)

I am planning to redo the VCG, get rid of the red sealant, use the ultra black one (sensor safe), check the noisy center fasterner. It is said torque to 8 ft lb, I have 3/8 torque wrench (5LB minimum). May be the torque wrench is inaccurate at the lower end but I just a little nervous on over torque.

If you have any idea please point me some direction.

Thank you very much in advance.
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Old 02-22-2013, 08:14 PM   #2
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Join Date: Jan 2010
Location: Southern California
Posts: 1,218
My Ride: '06 330 CIC ZHP
Someone might chime in here, but if you post in the main forum instead of the vert sub-forum you'll get a wider audience.
John '06 330 Cic ZHP
Southern California

ZHP, Cold Weather Pkg., Leather, Jet Black/Black/Black Cube, NAV
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Last edited by johnrando; 02-22-2013 at 08:14 PM.
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