BMW 1989-1995 525i Service Manual page 82

113-10
CYLIND ER H EAD REMOVAL AND INSTALLATION
Fig. 23. Pru uarv
I IfTlII lg
cnam tensioner rarrow ),
Fig . 24. Tlf1l1f19 cnam gUide
1ll0 un tlf~g
Dolls rar ro w s j.
35. Lift the primary chain sprocket off the exhaus t earn-
shaft. Remove the chain from the sprocket and tie the
chain up using stiff wire.
36. Using a Torx E8 socket.
remove the
two mou nting bolts
holding the cylinder head to the lower timing chain cov-
er. See Fig. 25.
REM OVING AND INSTALLING C YLINDER HEAD
Fig . 25. Cyhncle, 1 1 eiKj -1 0 -l ill1,ng chain
COV8 '
lllourot,n9!Jolls
Ia r r OWS I
37. Using BMW special tool no. 11 2 250 or an equivalent.
loosen the cylinder head bolts in
several stages
in the
sequence shown in Fig. 26. Discard the head bolts.
Fig . 26. Cvlincler
l~ ea(1
oott loo sen,ng sequence.
r
CA UTlON -
Iorx-type cylinder head bolts should not be re o
used. They are stretch-type bolts and must al-
ways be replaced whenever loosened.
NOT£: -
BMW special tool no.
1
t 2250
IS
a
thin-walled Torx E 12
socket and extension wrench wtlh
a
1/ 2 inch dri ve. The
cytinder need bolts are recessed «no the head below
the camshaft towers with /rtlle working space.