Honda Bmw 5 Service Manual

Cylinder Head and Valvetrain 
NOTE- 
The camshaft bearing caps  are coded with a letter  and a 
number.  For example,  A 
1 is the first exhaust camshaft 
bearing  cap 
at the front of the engine, and El is the intake 
camshaft bearing cap  at the  front  of the engine. 
-. - 
The camshafts  are stamped with a code letter - E for the 
intake  side and 
X for the  exhaust  side. 
E is for Einlap. (German  for intake) and XA7s for Auspuff. 
(German  for exhaust). 
- Repeat  procedure  for exhaust camshaft...

11 6-26 
I Cylinder Head and Valvetrain 
4 Before installing  camshaft  carriers, examine  bearing bores 
(arrows) on hydraulic  lifter bores  for signs  of  wear. 
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 
aositions 2 and 7.   

-- - . .- -, 
Cylinder Head and  Valvetrain 
4 Rotate camshafts  so that intalte and  exhaust  lobes for cylin- 
der 
1 face  each other  (arrows). 
CAUJION- 
A minimum waiting time  is required  for the  hydraulic  lifters to 
bleed downafter installing  the camshafts  into the cylinder 
head,  before  bringing  the piston  to TDC.  When  the camshafts 
are  removed,  the hydraulic lifters can  expand.  This expan- 
sion can  cause increased  valve lift when  the camshafts  are 
bolted  down, possibly...

11 6-28 
Cylinder Head and Valvetrain 
Double 
VANOS timing 
chain  components 
1. Impulse  wheel mounting  nut 
2.  Exhaust camshaft  impulse 
wheel 
3.  Spring  plate, exhaust 
4.  Thrust  spacer (T 
= 3.5 mm) 
5.  Splined  shaft 
6.  Torx  screw 
7.  Exhaust  camshaft  secondary 
sprocket 
8.  Secondary  timing chain 
9.  Splined  sleeve 
10. Primary  sprocket 
11.  Threaded  stud 
12.  Secondary  chain tensioner 
13.  Secondary  chain lower guide 
14.  Sprocket  mounting  nut 
15.  Spring  plate,...

-- 
Cylinder Head and valvetrain1 
Double VANOS secondary  timing chain components, 
installing 
(M52 TU, M54 engine) 
< Secure camshafts  in TDC position using BMW special tool 
set 
11 3 240. 
4 If necessary,  turn camshaft  so that special  tools are squarely 
seated  on cylinder  head. 
4 Lift timing  chain and hold  under tension   

~ ~. -- 
Cylinder Head and Valvetrain .- 
4 While maintaining  tension on timing chain, rotate crankshaft 
at  vibration  dampener  from 
30 before TDC in  direction  of ro- 
tation  (clockwise)  until number 
1 cylinder  is  at TDC  position 
with line between the  OIT mark  (arrow)  on front  pulley 
aligned with boss on  lower timing chain cover. 
4 Secure  crankshaft  in TDC  position with  BMW special tool 
11 2 300 (arrow). 
Slide impulse  wheel on intake camshaft,  aligning  boss with 
raised...

11 6-31 
Cylinder Head and Valvetrain 
< Install primary timing chain  on timing chain  sprocket and 
place on exhaust camshaft  so that  pointer on  sprocket 
(arrow) lines up with cylinder head sealing  surface. 
4 Insert BMW special tool 11 4 220 into timing chain tensioner 
bore  and bring center spindle  into contact with tensioning  rail. 
Tighten until  slack is removed,  but do not  pretension timing 
chain. 
NOTE- 
BMW special  tool 11 4 220 is an  adjustable  primary chain 
tensioner  and...

11 6-32 
Cylinder Head and Valvetrain 
4 Install secondary chain  tensioner (arrows). Keep tensioner 
compressed using 
BMW special  tool 11 3 292 or suitable  pin. 
4 Fit exhaust camshaft  splined sleeve. Confirm that  gap  in 
sleeve splines  aligns with corresponding  gap  in carnshaft 
splines 
(arrows). 
Slide  splined  shaft onto exhaust camshaft so that  locating 
tooth  of shaft fits into spline gaps  of camshaft and  splined 
sleeve 
(arrows). 
- Push  splined  shafl in further  to rotate...

Cylinder Head and valvetrain1 
< Place intake and exhaust sprockets in BMW special  tool 
11 6 180. Position spline gap  on intake sprocket  (arrow) as 
shown  and place  secondary  chain  on 
sprocitets. 
< Remove chain and sprockets  from tool and slide sprockets 
on  camshafts.  Confirm that  gap  in intalte sprocket splines 
lines  up with corresponding  gap  in camshaft splines (arrow). 
CAUTIOI\C 
Do not  alter position of sprockets with  respect to chain  when 
removinq from saecial tool 11 6...

/Cylinder Head and Valvetrain 
4 Insert sprocket mounting bolts (arrows) on exhaust side 
carnshaft  assembly. 
Initially tighten to  approx. 
5 Nrn (44 in-lb) and then  back  off 
by half a turn. 
4 Fit thrust  spacer (A) on exhaust 
camshaft. 
4 Install spring plate (A) to exhaust camshaft. Make sure that 
(F) mark is visible. 
NOTE- 
If F marlc is no  longer  visible,  install spring plate as  shown in 
inset.