BMW 5251 Service Manual page 192

.
Cylinder Head and Valvetrain
<
Remove cylinder head cover retaining studs (arrows) from
center and rear of cylinder head.
<
Remove spark plugs and install BMW special tool 11 3 260
(A) and 11 3 270 (6) to cylinder head. Tighten tool retaining
bolts in spark plug bores. Do not overtighten bolts.
Tightening
torque
BMW
special tool
11
3
260
I 1 1
3
270
to
23 Nm
(17
It-lb)
cylinder head
-
Remove intake camshaft bearing cap for cylinder number 1.
CA U T I O G
Intake camshaft bearing cap 1 is centered with adapter
sleeves. T o avoid can~sllaft daniage, it must be removed bs-
fore any other caps.
Turn eccentric shaft on special tool until pressure is applied
to camshaft bearing caps.
-
Remove remaining bearing cap mounting nuts
-
Slowly release pressure on camshaft bearing caps by turning
eccentric shaft. Remove bearing caps and camshaft. Repeat
procedure on remaining camshaft.
CAUTION-
Camshaft bearing caps must be reinstalled in their original lo-
cations.
NOTE-
The camshaft bearing caps are coded with a letter anda
number. For example, 'XI" is the first exhaust camshaft
bearing cap at the front of the engine, and "El "is the intalce
camshaft bearing cap at the front of the engine.
0
The camshafts are stamped with a code letter
-
"E" for the
intake side and 'MA" for the exhaust side.
0
" E is for Einlap, (German for intake) and 'XA"is for Auspuff,
(German for exhaust).