Honda Bmw 5 Service Manual

							
Camshaft Timing chain1 
< With compressed air line connected,  turn engine at  least 
twice in direction  of rotation until cylinder 
1 intake  and ex- 
haust  camshaft lobes  (arrows) face each  other. 
Do not  rotate engine  counterclockwise to  reach the top dead 
center position.  Instead, complete  another two complete  ro- 
Remove  sealing plug  from bore at bellhousing.  Secure crank- 
shaft  in 
TDC position with  BMW special tool 11 2 300 (ar- 
row). 
- Remove  cylinder head  cover studs at  rear of cylinder  head. 
< Place BMW special tool 11 3 240  over  camshafts  ends and 
measure clearance  of tool  to cylinder head  surface. 
NOTE- 
If the  exhaust side  of the  tool (A) is not  flush  with the  head, 
adjust camshaft timing  as described  below. 
Due  to flexible  sprocket design  and VANOS  control unit tol- 
erances  and play,  the 
intake side of special tool 11 3 240 
(B) may  be up to 1 mm (0.04 in) above  the surface  of the 
cylinder  head.  This  is normal.  Reassemble  engine. Other- 
wise,  adjust camshaft timing  as described  below. 
- Remove double VANOS  control  unit.  See VANOS control 
unit,  removing 
(M52 TU and M54 engines). 
< Press down  on secondary chain  tensionerand lock into place 
using  BMW special tool 
11 3 292  or equivalent pin  or drift.   
						

							
1 17-46 
Camshaft Timing Chain 
4 Loosen intake camshaft sprocket mounting  nuts (arrows)  by 
1 turn. 
Loosen exhaust camshaft  sprocltet mounting bolts: 
Release bolts 
(A) 112 turn 
Release  nuts 
(B) 2 turns 
Pull out intake camshaft splined shaft  out approx. 
1 mm 
(0.04  in) of splines  (arrows)  can be seen.   
						

							
Camshaft Timing chain] 
4 Pull out  exhaust  camshaft splined shaft to  stop. 
- Make sure camshafts are secured in TDC position  using 
BMW soecial tools 11 3 240 and 11 3 244. 
4 Preload primary chain tensioning rail: 
Tighten adjusting screw on 
BMW special  tool 11 4 220. 
Tightening torque 
Primary  chain tensioner  preload 
0.7 Nm (6 in-lb) 
4 Preload exhaust  camshaft spring plate  by pressing  on im- 
pulse wheel. Tighten mounting  nuts 
(arrows) by hand. Do 
not tighten  fully.   
						

							
- 
I Camshaft Timing Chain - -- 
Install BMW special tool 11 6 150 (VANOS setup bracket) to 
front  of cylinder head timing  case. Tighten  nuts 
(arrows) by 
hand,  and then  tighten  down uniformly  until special tool  is in 
full contact with cylinder  head. 
CAUTION- 
Male sure all gasket material  is removed  from face  of cylin- 
der  head.  Clean 
sealins face and keep  free of oil. 
Secure camshaft impulse  sprockets and wheels: 
Pretighten  Torx screws 
(A) on exhaust camshaft impulse 
wheel  to approx. 
5 Nm (44 in-lb). 
Pretighten mounting  nuts 
(B) on exhaust and intake 
sprocket assemblies to  approx. 
5 Nm (44 in-lb). 
- Torque down Torx screws (A) and nuts (8) to flnal 
specifications. 
Tightening torques  Sprocket assembly 
to camshaft 
initial  torque 
5 Nm (44 in-lb) 
Sprocket assembly to camshaft 
M7 Torx screw (A) 20 Nm  (15 fl-lb) 
ivl6 mounting  nut (B) 10 tdm (89 in-lb) 
- Remove flywheel locking tool  from transmission bellhousing 
so  that  crankshaft  is no longer  locked. 
- Remove camshaft locking  tools from  rear of cylinder  head. 
- Crank engine  over twice  by hand in direction of rotation until 
cylinder 
1 intake and exhaust camshaft lobes  face each other - again. 
- Secure crankshaft with BMW special tool 11 2 300. 
4 Place BMW special tool 11 3 240 over  camshaft ends and 
measure clearance  of tool to cylinder head  surface. 
NOJE- 
If the  exhaust side  of the  tool (A) is not  flush  with the head, 
camshaft timing 
Is incorrect. Repeat camshaft timing  pro- 
cedure. 
* Due to flexible  sprocket design  and VANOS  control unit  tol- 
erances  and play,  the 
intake side of special  tool 11 3 240 
(6) may be up to 1 mm (0.04 in) above the sudace of the 
cylinder head.  This is normal. Otherwise,  repeat camshaft 
timing procedure.   
						

							
-- - -- - -- Camshaft Timing chain1 
- Remove camshaft  locking tools from rear of camshafts 
- Remove  BMW special tool 11 4 220  (adjustable  primary 
chain tensioner). Reinstall  primary chain tensioner. 
Tightening torque  Primary chain  tensioner to cylinder  head 
70 
Nm (52 it-lb) 
- Remove crankshaft locking tool  from transmission bellhous- 
ing. Reinstall sealing  plug. 
- Remove VANOS setup bracket  from front  of cylinder  head 
- lnstall VANOS  control unit as described  earlier in this  group. 
- Remove  compressed  air fitting (BMW special tool 11 3 450) 
from  VANOS  control unit. 
- Fit VANOS  oil line banjo bolt with  new seals. Attach oil line to 
VANOS  control unit. 
Tightening torque 
Oil line  to VANOS  control unit (banjo  bolt)  32 Nm  (24 H-lb) 
- Remainder  of installation is  reverse of removal, noting  the fol- 
lowing: 
lnstall spark plugs. 
* lnstall intake camshaft  plastic baffle prior  to installing  cylin- 
der  head  cover.  lnstall ignition coil packs  and connect elec- 
trical harness  connectors. 
Install  radiator  cooling fan. 
- lnstall air filter housing  and top engine  cover. 
Tightening torque  Radiator cooling fan 
(VISCOUS clutch)  to  40 Nm  (30 ft-lb) 
coolant  pump 
Cyitnder head cover  to cylinder  head 10 Nm (89 in-lb) 
Sparlc plug  to cylinder  head  25  Nm (18 ft-lb)   
						

							
11 7-50 
/Camshaft Timing Chain 
Timing chains assembly 
(M52 TU and M54 engines) 
1. Impulse  wheel mounting  nut 
2.  Camshaft  impulse wheel 
(exh.) 
3. Spring  plate 
4.  Thrust  spacer (T 
= 3.5 mm) 
5. Primary  chain tensioner 
6. Torx screw 
7.  Exhaust secondary  sprocket 
8. Splined shaft 
9. Secondary timing chain 
10.  Splined  sleeve 
11.  Primary sprocket 
12.  Threaded  stud 
13.  Secondary  chain tensioner 
14.  Sprocket  mounting  nut 
15.  Spring plate 
16.  Splined shaft 
17.  Intake camshaft  sprocket 
18. Secondary chain lower guide 
19. Thrust  spacer 
20.  Camshaft  impulse wheel 
(intake) 
21.  Chain  tensioner  rail 
22.  Crankshaft sprocket 
23.  Threaded  stud 
24.  Primary  chain 
25.  Threaded  stud 
26.  Guide  rail 
27.  Threaded  stud 
28.  Woodruff key   
						

							
... -. 
Camshaft Timing chain1 
Timing chains, removing 
(M52 TU and  M54 engines) 
Camshaft  timing chain removal requires that  the oil pan  be re- 
moved.  See 
119 Lubrication  System. Also required is re- 
moval  of the  VANOS  control 
unit and disassembly of the 
intake and  exhaust camshaft  sprocket assemblies  as de- 
scribed  earlier in  this repair  group. 
Special BMW 
service tools  are needed for timing  chain re- 
moval  and installation.  The special tools assure  proper timing 
of  the  valvetrain.  Precise 
marlts to set the  timing on the cam: 
shafts are  not provided for  reassembly. Read the procedures 
through before beginning  the job. 
CA 
UTION- 
If the camshafts are  not properly  timed,  the  pistons can con- 
tact the  valves. 
- D~sconnect negative (-) cable from battery. 
CAUTION- 
* Disconnecting the  battery may erase  fault code@) stored in 
control  module  memory.  Check for fault codes using  spe- 
cial 
BMW diagnostic  equipment. 
Prior  to disconnecting  the battery,  read the battery dis- 
connection 
cautfons given in 001 General Cautions 
and 
Warninqs. 
- Remove  VANOS control unit. See VANOS  control unit, re- 
moving 
(M52 TU and M54 engines). 
Remove sealing  plug from crankcase below  starter and se- 
cure  crankshaft with 
BMW special tool ll 2 300. 
Drain engine  cooling system.  See 170 Radiator and Cool- 
ing  System. 
Remove  belt driven cooling  fan, fan shroud,  and thermostat 
housing. See 
170 Radiator  and Cooling  System. 
Remove drive  belts.  See 
020 Maintenance. 
NOTE- 
Mark direction  of belt rotation  if reusing belt. 
- Remove water  pump pulley fasteners  and pulley. 
- Drain  engine oil and  remove oil pan as described  in 119 
Lubrication  System.   
						

							
11 7-52 
Camshaft Timing Chain 
Remove primary camshaft chain tensioner  (arrow) from tim- 
ing chain  cover. 
CAUTIOIG 
Primary camshaft chain tensioning  piston is under spring 
pressure. 
Press  down on secondary chain  tensionerand lock into place 
using 
BMW special tool 11 3 292 or  a similar  size wire. 
Remove  exhaust camshaft impulse wheel 
rows).  Remove  impulse wheel  (A). 
4 Remove spring plate  (A).  mounting 
nuts 
(ar-   
						

							
- 
Camshaft Timing chain1 
< Remove intake camshaft sprocket  mounting nuts (arrows) 
and  remove  spring plate (labelled 
FRONT). 
Remove tom screws from  exhaust camshaft  sprocket 
(arrows). 
Lift  off exhaust and intake  sprockets with secondary chain, 
thrust  spacer 
(A) and splined shaft (B). 
CAUTION- 
Splined shafts  for both  intake  and exhaust  camshafts share 
the  same  part 
numbe,: Remove  and mark used splined 
shafts  in order  to reinstall  in original  locations. 
4 Remove exhaust camshaft splined  sleeve (A) and shaft (8).   
						

							
1 17-54 
Camshaft Timing  Chain 
4 Remove secondary  chain tensioner  mounting bolts (ar- 
rows). 
Remove  tensioner  while keeping  locking pin in place. 
4 Remove primary chain  sprocket mounting  studs (arrows) on 
exhaust camshaft. 
4 Lift  primary  chain sprocltet off exhaust camshaft.  Remove 
sprocket from  chain.