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...

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...

-- - -- - -- 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...

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 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...

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...

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.