BMW 5251 Service Manual page 303

Camshaft Timing chain1
-
Disconnect negative cable (-) from battery.
CAUTION-
Prior to disconnecting the battery, read the battery discon-
nection cautions given
in
001 General Cautions and
Warnings.
4
Removing top and side engine covers:
Press down on locking pins (arrows) to release locks. Lifl
intake manifold cover straight up to remove.
Pry out caps from side covers.
Remove fasteners and covers.
NOTE-
Some early models use pry out trim caps and fasteners to
hold the top cover in place.
Disconnect electrical harness connectors at ignition coils
(A).
Remove left and right side ignition coil mounting fasteners
and coils.
NOTE-
Make note of location of ground strap (arrow).
Remove spark plugs.
-
Remove posltlve (+) terminal cable from left cylrnder head
cover.
-
Unbolt left and right side cable ducts from fuel rail
Remove air filter housing and mass air flow sensor:
Disconnect mass air flow sensor and intake air tempera-
ture sensor electrical harnesses (A and B).
Remove air filter housing mounting fastener (arrow)
Loosen intake hose clamp (C).
Remove air filter housing with mass air sensor and intake
duct from throttle body assembly.