Checking Valve Guide For Wear; Removing Valve Guide - BMW F 650 GS Repair Manual

Checking valve guide for wear

00 2 510
•
Insert new valve from combustion chamber side
into valve guide until it reaches the valve stem
seal.
•
Using dial gauge, BMW No. 00 2 510, posi-
tioned vertically on the valve axis, measure max-
imum tilt clearance across the camshaft axis.
Tilt clearance:
Max. tilt clearance ....................... 0.4 mm (0.016 in)
Intl. dia. of valve guide...max. 5.080 mm (0.2000 in)

11 12 591 Removing valve guide

2
e
Important:
Do not damage sliding surfaces on bucket tappets:
risk of jamming.
•
Pull off valve stem seal (1) with pliers,
BMW No. 11 1 250.
•
Remove valve spring support (2) from cylinder
head.
11.28
11 0 571
F110111
L
Note:
To simplify driving out, heat the cylinder head to
100 °C (212 °F).
Use temperature measuring device,
BMW No. 00 1 900, to check the temperature.
•
Use drift, BMW No. 11 0 571, to drive out the
valve guide toward the combustion chamber.
e
Important:
If the valve guide bore in the cylinder head is worn,
the cylinder head must be replaced.
1
F110121
F110140