Valve Adjustment - BMW R850 Maintenance Manual

Valve Adjustment

Tools
T-handle hex – 3mm, 5mm, 6mm
plug wire cap puller
sparkplug socket
short extension
ratchet
rag
hex socket - 6mm
long thin screwdriver
box wrench – 10mm, 16mm (17 will work)
small flashlight
feeler gauges
sharp awl
1. Remember – engine cold!
2. Bike on centerstand.
3. Transmission in neutral.
4. Remove the black plastic valve cover protectors, if installed, using a 5mm T-
handle hex wrench.
5. Remove the black valve cover strip by pulling outward on the end where the
plug wire goes under it.
6. Pull the plug wire cap off the sparkplug using the special black plastic tool in
your BMW tool kit.
7. Before removing the sparkplug, blow compressed air around the plug well –
there is often dirt here that can fall into the cylinder when you remove the spark
plug!!!
Note: If you do not have an air compressor, you can get a compressed air tank at
any Xmart automotive department, or you can get a small can of compressed air
at any photo or computer supply store.
8. Repeat again after turning the spark plugs a couple of turns.
9. Remove the spark plugs using the tool kit spark plug socket or 5/8 in. deep
well very thin wall socket.
Warning!: It is very easy to get a spark plug socket stuck in the plug well. If your
socket does not slide onto the spark plug easily, do not use it!!! Use the spark
plug socket in the BMW tool kit instead. I welded a nut onto the end of my BMW
socket so I could use a torque wrench on it when installing the spark plugs.
10. Place an oil drain pan under the valve cover.
11. Remove both valve covers using a 6mm hex socket and ratchet.
Note: Loosen the valve cover bolts until you can pull them part way out. They
stay in the valve cover – do not try to pull them all the way out.
Parts
none
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