Honda Bmw 5 Service Manual

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Camshaft Timing Chain -. - 
Measure  gap (B) between secondary timing chain tensioner 
and  intake  camshaft  sensor wheel. Make note  of distance. 
To  determine  VANOS control travel: 
Distance 
I3 - distance A = a minimum  of 8.5 mm 
CAUTION- 
If the adjustment travel  is less than 8.5 mm the VANOS ad- 
justment  unit must  be removed  and readjusted.  See 
VANOS 
control unit, removing (M52 engine) 
and VANOS  con- 
trol unit, installing 
(M52 engine). 
Remove special tools: 
Cranltshaft  locking...

Camshaft Timing Chain Timing chains, removing 
(M52 engine) 
Camshaft timing chain removal  on M52 engines requires en- 
gine oil  pan removal. 
Special 
BMW sewice tools are  needed for timing  chain re- 
moval  and installation  procedures.  The special tools assure 
propertiming  of thevalvetrain.  Precise marks to 
setthe timing 
on the camshafts are not  provided for reassembly. Read the 
procedures through  before beginning  the job. 
NOTE- 
If the camshafts  are not properly  timed, the pistons...

4 With crankshaft  at TDC  position,  remove vibration  damper 
bolts  (arrows)  and remove  vibration  damper. 
< Mount crankshaft  holding tool (BMW special  tool 11 2 150 
and 
11 2 410) to  crankshaft  hub. Counter  hold crankshaft  and 
loosen crankshaft  hub retaining  bolt. 
Crankshaft  hub retaining bolt  is torqued  to 
410 Nm (300 ft-lb). 
Do  not  use flywheel 
locliing tool to  hold cranl(shait stationary 
to  loosen or tighten crankshaft  hub center bolt. Use  only the 
special  tools...

[camshaft Timing Chain 
< While pressing  down on secondary timing chain tensioner 
install locking tool  (BMW 
11 3 292) or  a similar  pin. 
NOTE- 
Two types  of secondary timing chain tensioners  are used, 
with  either  two holes  (shown)  or a single  hole for the 
locking 
pin  tool. 
- Remove  intake and exhaust  sprockets together with 
secondary chain. 
< Remove  secondary timing chain tensioner bolts (arrows) 
and remove tensioner. 
- Remove  primary timing chain  sprocket from  exhaust...

Camshaft Timing chain1 
Using a drift,  drive two locating dowels (arrows) in lower 
timing  cover  toward  rear  of car. 
4 Remove timing  cover mounting bolts (arrows). 
* Carefully slide  cover with water  pump forward  to remove 
CAUTION- 
Use  care  when  removing the cover  from the cylinder  head 
gasket If the cover is stuck, use a sharp  knife  to  separate 
it  from the head  gasket. 
If cylinder  head gasket  is damaged, remove cylinder 
head  and replace  head 
gaslet. See 113 Cylinder 
head...

1 17-30 
I Camshaft Timing Chain 
Timing chain, installing 
(M52 engine) 
CAUTION- 
The procedure outlined below  assumes that the camshafts 
and  the crankshaft  are 
lockedin the TDCposition with BMW 
special tools. 
- Inspect timing chain and  sprocltets and guide rails for wear. 
Replace worn parts. 
NOTE- 
If  any of  the sprockets  are being replaced  due to wear,  the 
chain  should  also be replaced. 
Install primary timing chain 
on  exhaust  camshaft.  to crankshait 
sprocket and hang 
4 Apply...

Camshaft Timing chain1 
Tap locating  dowels into cover  until they  protrude 2 to 3 mm 
from sealing  surface. 
- Using new gaskets,  install lower timing chain  cover: 
Tap  cover  into position  to engage  dowels. 
Install timing chain  cover fasteners and  tighten to 
5 Nm (44 
in-lb). 
Drive  dowels  in flush to front  of cover. 
. Tighten  cover mounting bolts alternately  and in stages. 
Install cylinder head  to timing chain  cover fasteners  and 
tighten. 
Tightening torques  Lower  timing...

-- - 
Chain 1 
- Install cylinder identification trigger plate to front of intake 
camshaft. 
- Install spacer  to front  of intake camshaft 
- Install secondary chain  sprockets and chain  as an  assembly 
so that arrows on sprockets are pointing  up. Center  mounting 
holes in sprockets to bolt holes  in camshafts. 
4 lnstall thrust washers and spring plate  to intake cam 
sprocket. 
Tighten intake camshaft  sprocket nuts. 
- Install VANOS  control unit, see VANOS control  unit, install- 
ing 
(M52...

-- Camshaft Timing Chain -- - 
Tightening torque 
Vibration  damper hub to crankshaft 
410 Nm (300 ft-lb) 
4 Install  cranltshaft  hub and vibration  damper while  aligning 
locating  hole (arrow)  in damper  with dowel  pin in hub. 
Tightening  torque 
Vibration  damper and 
pulley to 
cranltshaft  hub 
22 Nm (17 ft-lb) 
- Turn engine over by hand  in direction  of rotation  at least  two 
full  rotations. Reinstall  camshaft and crankshaft  locking 
toois 
to recheck  engine timing.  Remove locking...

1 17-34 
1 Camshaft Timing Chain 
DOUBLE VAMOS SYSTEM 
(M52 TU AND M54 ENGINES) 
Double VANOS system function 
The M52TU and M54 6-cylinder  engines are  equipped with  a 
Double VANOS system that varies  intake and exhaust cam- 
shaft timing. 
The  main  components  of the  Double  VANOS system  are: 
lntalte and exhaust camshafts with  helical spline inserts. 
Camshaft sprockets with  adjustable gears. 
VANOS  actuators  (two  position piston  housing with 
inter- 
nallexternal helical spline cup)....