Honda Bmw 5 Service Manual

11 6-55 
Cvlinder Head and valvetrain1 
4 Remove cylinder  head cover sealing  gasltets  from left cylin- 
der head  cover. Install BMW special  tool 11 1 412  into gasket 
groove  of cylinder head  cover. 
Install left cylinder  head cover. Fit cylinder  head cover re- 
taining nuts  to cylinder head  cover studs  at cylinders 
5 and 
6 (first two  cylinders  on left  side  cylinder  bank). 
* Tighten  nuts uniformly  in I? turn steps. 
NOTE- 
BMW special tool 11 1 4 12presses upper  timing chain cover...

1 16-56 
Cylinder Head and Valvetrain 
This section covers valve removal and reconditioning, includ- 
ing valve guides, seats, springs,  and valve  stem oil seals. 
Valves,  leak test 
To test  the valves  for leakage, the cylinder head  must be dis- 
assembled with  camshafts and camshaft carriers removed. 
With valve assemblies and  spark plugs installed, place the 
cylinder head on a workbench with the combustion  chamber 
facing upward. Fill each combustion chamber with a thin non- 
flammable...

- 
- - . - Cylinder Head and Valvetrain - 
Table c. Valve  specifications 
Valve  head diameter 
lntaite 33.0 mm 33.0 mm 35.0 mm 
Exhaust 
30.5 mm 30.5 mm 30.5 mm 
Valve  stem diameter 
- Standard 
Intake 
6.0 mm .0.025 6.0 mm -O.o .o.040 6.0 mm .0.025 .0,040 
Exhaust 6.0 mm -0.00 -0.055 6.0 mm -0.040 .0,055 6.0 mm .0.040 .0,055 
Valve  stem  diameter - Oversize 1 (identified  on stem  as Rl) 
Intake 6.1 mm -0.025 .0.040 6.1 mm .0-025 .0,040 6.1 mm -O.o .o,040 
Exhaust 6.1 mm .O.O4O ..,,,, 6.1 mm -0.040...

Table d. Valve  guide  specifications 
Specifications 
All engines (1997-2002) 
Valve guide  wear, maximum  0.5 mrn (0.020 in) 
(valve tilt clearance 
measured 
with  new valve) 
Valve  guide inside  diameter, 
installed 
(tolerance  per IS0 allowance H7) 
Standard  6.0 mm  (0.236  in) 
Oversize 
1 6.1  mrn  (0.240  in) 
Oversize 2  6.2 
mm  (0.244  in) 
Valve stem oil seals 
The purpose  of the valve stem oil seal is to  prevent excess  oil 
from  entering the combustion  chamber. The sign of faulty...

Cylinder Head and valvetrain1 
Valve  seats 
< The valve  seats  should be  resurfaced whenever  new valves 
or  valve guides  are installed.  Cutters  are required to  resur- 
face  the seats.  Always check the  valves for leaks after recon- 
ditioning  a valve seat as described  above. Table e. Valve 
seat  specifications  lists valve seat dimensions. 
Table  e. Valve  seat specifications  (refer to figure) 
All 
6 cylinder  All 8 cylinder 
engines (1997- engines (1997- Specification  2002) 2002)...

11 6-60 
Cylinder Head and  Valvetrain 
Valve springs 
The valve springs  should be checked for fatigue.  To quickly 
check  the springs, line  them up in a row. Place  astraight edge 
across  the top  of the  springs.  Any spring that is significantly 
shorter  than the others  is worn and should  be replaced. 
Valve spring specifications and wear limits are  not available 
from 
BMW.   

11 7 Camshaft Timing Chain 
General ........................... .I I 7-2 Double VANOS  System 
Special tools ........................ .I 17-2 (M52 TU and M54 engines) ......... 11 7-34 
Crankshaft  Oil Seal,  Front ........... I 17-6 
Crankshaft oil  seal, front, 
replacing 
(M52 engine) ................ .I1 7-6 
Crankshaft oil seal, replacing 
(M52 TU  and M54 engines) ............ .I 17-9 
Crankshaft oil  seal,  replacing 
(M62 and M62 TU engines) ........... .I1 7-1 1 
VANOS Control  Unit and 
Timing...

1 17-2 
Camshaft Timing Chain 
This repair group covers timing  chain and VANOS repair 
information for the  following engines: 
M52  (Single VANOS 6-cylinder  engine) 
M52 
TU and  M54  (Double  VANOS engines) 
M62  (Non  VANOS 
V-8 engine) 
NOTE- 
The M62 TU V-8 engine  with VANOS Variable  Camshaft 
Timing  repair information  is not  included. 
NOTE- 
See 100 Engine  General  for engine  code and application 
information. 
Worn  timing chains  and sprocltets  can lead  to noisy operation 
and...

1 17-3 
Camshaft Timing Chain 
4 Crankshaft seal installation bushing, V-8 
(Tool No. BMW  11 1 220) 
4 Upper  timing  cover Installation tool, V-8 
(Tool  No. BMW  11 
1 41 11412) 
4 Crankshaft  hub locking  tools (6-cylinder  engine with 2 piece 
vibration  dampener)  (Tool No. BMW 
11 2 150 11 1 2 410) 
4 Cranltshaft  loclting tool 
(Tool No. BMW 
11 2 300) 
I I 4 Seal  extractor tool  set 
(Tool No. BMW  11 2 380)   

[Camshaft Timing Chain 
4 Camshaft locking tool set,  6-cylinder 
(Tool  No. BMW 
11 3 240) 
- 4 Crankshaft seal installation  bushing. 6-cylinde~ 
4 Secondary chain tensioner locking pin  set. 6-cylinder 
(Tool  No. 
BMW 11 3 290) 
11 3292 
4 Secondary chain tensioner loclting pin, V-8 
(Tool No. BMW  11 3 310) 
4 Air line fitting 
(Tool  No. BMW 
11 3 450) 
4 Protractor 
(Tool No.  BMW 
11 3 460)