Honda Bmw 5 Service Manual

Camshaft Timina chain1 
- Remove viscous clutch cooling  fan. See 170 Radiator and 
Cooling 
System. 
CA UTlOEIC 
The  radiator cooling  fan nut (32mm wrench)  has left-  hand 
threads. 
. 
< Remove  engine trim covers: 
Pry  out plastic trim  caps  (arrows). 
. Remove cover fasteners and covers. 
4 Remove ignition coils: 
0 Disconnect ignition coil electrical harness  connectors 
Remove 
coil mounting  fasteners and remove coils. 
Remove spark  plugs. 
NOTE- 
Make note  of ignition  coil ground  strap...

Camshaft Timing Chain -- - -1 
Q Remove  oil baffle  cover 
from intake 
camshaft 
Remove front engine  lifting bracket fasteners  (arrows 
A) and 
remove bracket. 
- Remove cable  duct clips (arrows B) from front  of VANOS 
control unit. 
Rotate engine 
clocltwise and  set camshafts  to Top  Dead 
Center  (TDC). Cylinder 
1 camshaft  lobes will point towards 
each  other  (arrows). 
4 Remove  plug from below starter  and install crankshaft  lock- 
ing  tool 
(BMW special tool 11 2 300).   

Camshaft Timing Chain 
4 Unscrew  and remove cylinder  head cover studs  (arrows) at 
rear  of cylinder head. 
% Secure camshafts  in TDC position  using BMW special tool 
set 
11 3 240. 
4 Remove access  plugs (arrows)  from VANOS  control unit.   

117-18 
Camshaft Timing Chain 
4 Loosen 4 bolts (arrows) from exhaust camshait sprocket 
(Torx E10). 
Press down on secondary chain tensioner  and lock into place 
using  BMW special tool 
11 3 292 or a similar  size pin. 
NOTE- 
Two types  of secondary  timing chain tensioners  are used; 
one  with two holes,  and one with a single  hole for the 
locl

Camshaft Timing chain1 
VANOS control unit, installing (M52 engine) 
CAUTION- 
Incorrect installation of the VANOS control  unit may result  in 
damage  to the  engine. 
- Make  sure camshafts and crankshaft are loclted in TDC po- 
sition with  BMW special tools  as described during  VANOS 
removal. 
< Rotate  exhaust  camshaft  sprocket clocltwise (as viewed  from 
front  of engine)  using BMW  special tool 
11 5 490, until detent 
position  stop is reached. 
4 Apply  a small amount  of liquid gasket...

11 7-20 
Camshaft Timing Chain 
4 lnstall BMW special tool 1 I 5 490 on exhaust camshaft. 
- Insert  the helical-toothed splined  shafl (arrow) into the heli- 
cal-toothed sprocket while rotating  gears and chain counter- 
clockwise with special tool. 
CAUTION- Ensure 
that the  first  available tooth  engages. It is  important 
that  the exhaust camshaft sprocket  be turned  only the mini- 
mum amount  necessary to engage  the gear  cup. If this  pro- 
cedure  is done 
incorrectlq: the VANOS system may...

Camshaft Timing Chain/ - - - - - - . - - . - . 
Tighten exhaust  camshaft  sprocket mounting bolts  (arrows) 
alternately  in two stages. 
Tightening  torques 
Secondary timing chain sprocltets  to camshafts 
Stage 
1 
Stage 2 
5 Nm (44 in-lb) 
22 Nm (17 ft-lb) 
- Remove  crankshaft  locking  tool and camshaft locking tool 
set. 
- install  camshaft  gear bolt access plugs using  new sealing 
washers  and tighten. 
- Remove  timing chain tensioning tool  from side of cylinder 
head. Install primary...

Camshaft Timing Chain 
VANOS timing,  checking  and adjusting 
(M52 engine) 
NOTE- 
* Special  BMW service  tools are required to remove  and in- 
stall  the VANOS  control unit. Read the  procedure through 
before  starting the  job. 
If  the camshafts  are not properly  timed, the pistons  can 
contact  the valves. 
- Disconnect negative (-) cable  from battery. 
CAUTIOG  Disconnecting the battery  may erase 
faultcode(s) storedin 
control module memory.  Prior to disconnecting the battery, 
checlc...

Camshaft Timing Chain 
4 Disconnect  VANOS electrical harness connector (A) and oil 
line fitting 
(B) from  VANOS  control unit. 
NOTE- 
Wrap the VANOS oil line  fitting  with a  shop rag to absorb 
leaking  oil. 
Disconnect cranltcase breather  by squeezing  at arrows. 
- Remove  cylinder cover mounting  fasteners and  remove 
cylinder head  cover. 
NOTE- 
The cylinder  head cover mounting  bolt insulators andgas- 
lets  should be  reinstalled  in their original positions.  Make 
note of  their...

1 17-24 
I Camshaft Timing Chain 
4 Remove banjo bolt  from VANOS  unit oil feed line  and install 
BMW special tool 11 3 450. 
NOTE- 
Oil  will drain from  oil feed line. 
- Connect compressed air line (with pressure set  to 2-8 bar or 
30-1  10 psi.)  to air  fitting. 
4 Measure  gap (A) between secondary timing chain  tensioner 
and 
intake camshaft sensor wheel.  Make note of distance. 
4 Connect  cable test (BMW special tool 11 6 410) to VANOS 
connector. Connect positive clip to positive battery...