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7 Series DIY
Do It Yourself forum dedicated for 7 Series BMW Owners

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Old 04-25-2011, 01:35 PM
Keif Keif is offline
Master Tinkerer
Location: Houston, TX
 
Join Date: Mar 2008
Posts: 2,196
Mein Auto: 2007 Alpina B7
DIY - Valve stem seal replacement - smoking / burning oil at idle

Link to my valve stem seal replacement pictures/steps --> here.

Symptoms:
Car would start burning oil / smoking from the tailpipe if left near idle for a little bit (rush hour traffic, sitting at traffic lights, parked and idling, etc.). It may have been smoking at other times, but I never noticed anything significant when moving.

Amount of time taken: An entire weekend plus several weeknights.

Special tools:
  • Fan removal tool (if you have an earlier model with the fan mounted to the water pump)
  • Camshaft timing jigs
  • Valve spring compressor kit

Word of caution: If you are cautious and meticulous about your work, you'll be fine doing this. If you are less than very comfortable replacing valve covers, timing covers, water pumps, etc., or if you tend to be kind of sloppy with your work, then pay someone else to do this task; you can easily mess up your engine in many ways during this procedure.
__________________
 
Black 2007 Alpina B7
Tension strut bushings
 
White 2007 Alpina B7
Supercharger clutch/bearings, replaced exhaust valve/pulled head, sunroof seal, 6000K angel eyes
 
Black 2002 BMW 745Li (sold)
KW v3's, blue angel eyes, 8000K headlights & HID fogs, rebuilt alternator & mounting bracket gasket, sunroof seal, CCVs, plugs, sway bar bushings, timing & valve cover gaskets, valve stem seals, guibo joint, mechatronic sealing sleeve, trans fluid, sanded headlights...

Last edited by Keif; 04-25-2011 at 02:31 PM.
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  #2  
Old 04-25-2011, 01:35 PM
Keif Keif is offline
Master Tinkerer
Location: Houston, TX
 
Join Date: Mar 2008
Posts: 2,196
Mein Auto: 2007 Alpina B7
Current status of pictures/steps on flickr --> unorganized, no titles/tags/descriptions.

Basic procedure:
  1. Remove fan
  2. Set crankshaft to TDC (notch in vibration damper lines up with hole at roughly 10:30 / northwest) and stick a pin in hole/notch to lock crankshaft in place
  3. Unbolt power steering fluid reservoir and DSC pump (next to the coolant reservoir) from their mounts so you can move them around a little
  4. Remove fan, air box, intake pipe, pipe(s) going from CCVs to intake manifold, coolant reservoir, hood switch, microfilters, microfilter ducts, metal firewall bridge piece over rear of engine, spark plug looms, spark plug coilpacks, tank vent valve (on top-front of driver's side head), vacuum pump, Valvetronic motors (big round can-looking things at top-middle of each valve cover), VANOS solenoids (2 mounted to face of upper timing chain cover on each head), disconnect fuel line (goes across/above driver's valve cover), remove other stuff I probably forgot
  5. Remove valve covers
  6. Remove oiler lines (single bolt between cams near VANOS adjustment units, then unclip piping)
  7. Pull back and unhook tensioner spring from eccentric shaft (can turn eccentric shaft about 180 degrees to make this easier)
  8. Remove timing chain guide on each head
  9. Remove gears at ends of camshafts (VANOS adjustment units), tie timing chain to something so that it doesn't slip off the crankshaft
  10. Plug all oil drain holes in head HARD with a balled up paper towel, otherwise you'll lose spring keepers down them -- ask how I know
  11. Remove camshafts (Valvetronic system's eccentric shaft and intake cam come off as one unit; exhaust camshaft comes off alone), keep careful note of the location of each bearing cap/journal and how it is oriented when in place
  12. Remove rockers -- there is a small spring that unclips at the HVA (hydraulic valve adjuster), while the other end of each rocker lifts off the valve easily
  13. Remove spark plug for a cylinder
  14. Pressurize cylinder -- tool for hooking up an air compressor often comes with the valve spring compressor kit you'll need
  15. Mount valve spring compressor across camshaft journal studs (if you have the bridge-looking valve spring compressor kit seen in my pictures)
  16. Compress valve spring, remove spring keepers
  17. Remove valve spring
  18. Remove valve stem seal -- it just pops off if you pull it hard enough; I used a dental pick type tool to hook under the old seal and pull up
  19. Lubricate new valve stem seal with a little oil and push flat to cylinder head -- I just pushed each on with a 16mm socket, which worked fine
  20. Attempt to keep your sanity while you compress valve spring and put spring keepers back on -- I found a magnetized flat head screwdriver VERY helpful in doing this
  21. Reinstall rockers (make sure they are seated well)
  22. Reinstall cams
  23. Time camshafts to crankshaft using special timing rigs
  24. Put everything back together and hope you didn't pinch a wire somewhere

...probably some more stuff to come. Feel free to call me out on steps I may have forgotten and I'll edit the list.
__________________
 
Black 2007 Alpina B7
Tension strut bushings
 
White 2007 Alpina B7
Supercharger clutch/bearings, replaced exhaust valve/pulled head, sunroof seal, 6000K angel eyes
 
Black 2002 BMW 745Li (sold)
KW v3's, blue angel eyes, 8000K headlights & HID fogs, rebuilt alternator & mounting bracket gasket, sunroof seal, CCVs, plugs, sway bar bushings, timing & valve cover gaskets, valve stem seals, guibo joint, mechatronic sealing sleeve, trans fluid, sanded headlights...

Last edited by Keif; 04-25-2011 at 02:32 PM.
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