Honda Bmw 5 Service Manual

116-15 
Cylinder Head and Valvetrain 
4 Remove primary timing chain tensioner plug (arrow) and pri- 
mary  tensioner. 
CAUTION- 
Primary timinq chain tensioner  is under sarina aressure. 
4 Remove  primary timing chain sprocket  and timing  chain from 
exhaust  camshaft. 
- Remove crankshaft  locking tool (BMW 11 2 300) from 
flywheel (installed during 
VANOS removal). 
Lift  timing chain (holding under tension)  and rotate engine 
counterclockwise 30  from 
TDC. 
- Suspend timing chain with mechanics...

. 
Cylinder Head and Valvetrain 
< Remove  cylinder head  cover retaining studs (arrows) from 
center and rear  of cylinder head. 
< Remove  spark plugs and install BMW special tool 11 3 260 
(A) and 11 3 270 (6) to cylinder  head. Tighten tool retaining 
bolts in spark plug  bores.  Do not overtighten bolts. 
Tightening 
torque 
BMW special tool 11 3 260 I1 1 3 270 to 23 Nm (17 It-lb) 
cylinder  head 
- Remove intake camshaft bearing cap  for cylinder number 1. 
CA UTIOG 
Intake camshaft  bearing cap 1...

Cylinder Head and Valvetrain 
4 Secure hydraulic lifters  in lifter  bores using BMW special  tool 
11 3 250, or remove  lifters using a magnetic  pick-up  tool. 
4 Remove camshaft bearing  carrier from cylinder  head. 
CA UTION- 
Camshaftbearing carriers must be reinstalledin  their original 
/ locations (E for ir;fal

116-18 
Cylinder Head and Valvetrain 
4 Install  camshaft carriers  with hydraulic lifters  into cylinder 
head.  Note marks  on  carriers: 
(E) for intake side and (A) for 
exhaust  side. 
4 Center camshaft  carrier  on  pins (arrows)  at bearing  posi- 
tions 
2 and 7. 
4 Install  camshafts  with number 1 cylinder  camshaft  lobes fac- 
ing  each other  (arrows). 
CAUTION- 
A minimum waiting time is required  for the  hydraulic lifters  to 
bleed  down after installing the camshafts into the cylinder...

Cylinder Head and valvetrain1 
- Remainder  of installation  is reverse  of removal, noting the 
following: 
See 
117 Camshaft  Timing Chain for VANOS  control unit 
installation. 
Tightening  torques 
Camshaft bearing  caps 
to cylinder head (M7) 15 Nm (1 1 ft-lb) 
Cylinder  head cover to cylinder  head (M6) 10 Nm (89 in-lb) 
Sparic plugs (M12) 23 Nm  (17 ft-lb) 
Camshaft and lifter, removal  and 
installation 
(M52 TU and M54 engine) 
Camshafts and lifters,  removing 
(M52 TU and M54 engine) 
WARNING-...

/Cylinder Head and Valvetrain 
Press  down on secondary chain  tensionerand loclc into place 
using 
BMW special tool 11 3 292, or  a thin drift  or pin. 
4 Remove exhaust camshaft impulse wheel mounting  nuts 
(arrows).  Remove impulse wheel  (A). 
< Remove spring plate  (A). 
4 Remove intake camshaft sprocket  mounting nuts (arrows) 
and remove spring plate (labelled 
FRONT).   

I_ 
-. 
Cylinder Head and Valvetrain 
Remove torx 
(arrows).  screws 
from 
exhausl 
: camshaft : sprocket 
Lift  off exhaust and intalte  sprockets together with secondary 
chain, thrust spacer 
(A) from exhaust camshaft, and  splined 
shaft  (B) from  intake  camshaft. 
CAUTIOf+ 
Splined  shafts share  the same  part number  for both intake 
and  exhaust  camshafts.  Used splined  shafts must be rein- 
stalled  in their 
oriqinal locations. 
Place intalte and  exhaust sprockets  in 
BMW special tool...

11 6-22 
Cylinder Head and Valvetrain 
Remove secondary chain tensioner mounting bolts (arrows) 
and remove tensioner with locking tool  in place. 
Remove  primary chain  sprocket mounting studs 
(arrows) on 
exhaust camshaft. 
NOTE- 
Counterhold camshafts  when loosening. 
Lifl  primary chain sprocket  off exhaust camshaft.  Remove 
sprocket  from chain.   

11 6-23 
Cylinder Head and  Valvetrain 
Place timing 
chain on end of exhaust  camshaft 
4 Do not remove end spline retaining  screws from camshafts 
(arrows). 
CAUTION- 
The  end spline retaining screws  precisely locate the end 
splines  to the  camshafts.  Do not  loosen  these screws. 
Remove  locating studs  (arrows) from 
intake camshaft.  Lift 
off  intake 
camshaft thrust  spacer (A) and impulse  wheel (B) 
4 Remove cylinder head cover mounting studs  (arrows) from 
center  of cylinder  head. 
-...

..--. 
I Cylinder Head and Valvetrain - I 
4 Lift primary chain and hold under tension, rotate  engine 
against direction  of rotation (counterclockwise) approximate- 
ly  30. 
To  prevent  damaging  valves while 
worlcing on camshafts,  no 
aistons should be in the  TDC  position. 
- Remove BMW  special tool set 1 I 3 240 from rear of cylinder 
head. 
Remove retaining nuts  (arrows) and bearing  cap 
1 of intake 
camshaft. 
Intake camshaft  bearing cap 
1 is centered  with adapter 
sleeves.  To avoid...