oil pump removal BMW 525i 1997 E39 User Guide

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Camshaft Timing Chain Timing chains, removing
(M52 engine)
Camshaft timing chain removal on M52 engines requires en-
gine oil pan removal.
Special
BMW sewice tools are needed for timing chain re-
moval and installation procedures. The special tools assure
propertiming of thevalvetrain. Precise marks to
setthe timing
on the camshafts are not provided for reassembly. Read the
procedures through before beginning the job.
NOTE-
If the camshafts are not properly timed, the pistons can con-
tact the valves.
- Remove VANOS control unit. See VANOS control unit, re-
moving (M52 engine).
- Remove radiator cooling fan and shroud. See 170 Radiator
and Cooling System.
- Drain cooling system. See 170 Radiator and Cooling Sys-
tem.
- Remove coolant hoses from thermostat housing and remove
thermostat housing from front of cylinder head.
- Loosen bolts for coolant pump pulley.
- Remove drive belts for alternator and AIC compressor. See
020 Maintenance.
- Remove coolant pump pulley.
Remove drive belt tensioner mounting bolts (arrows) and re-
move tensioner from front of engine.
- Remove engine speed sensor from lower timing chain cover.

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-- - -- - -- 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)

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... -.
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.

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11 7-66
I Camshaft Timing Chain
4 install cylinder head cover:
Check for correct seating of half-moon seals
(A) in back of
cylinder head cover.
Use a small amount of Three Bond
1209 8 or equivalent
sealant at corners
(B) of half-moon cutouts. Seal corners
in front of cylinder head at VANOS control unit.
Tightening torque
Cylinder head cover to cylinder head
10 Nm (89 in-lb)
- Remainder of reassembly is reverse of removal, noting the
following:
Secure all coolant hoses, thermostat housing, engine cool-
ant drains.
Install new engine oil filter and oil. See
119 Lubrication
System.
Refill and bleed cooling system as described in
170 Radi-
ator and Cooling system.
Use scan tool to check VANOS operation with engine
idling.
Tightening torques Coolant drain plug to cylinder block
25 Nm (18 ft-lb)
Radiator cooling fan (viscous clutch)
to coolant pump
40 Nm (30 ft-lb)
Radiator drain screw to radrator 2.5 Nm (22 in-lb)
Vibration damper hub to crankshaft 41 0 Nm
(300 ft-ib)
TIMING CHAIN
(M62 ENGINE TO 911998)
Timing chains, removing
(M62 engine to 911 998)
Camshaft timing chain removal requires that the engine oil
pan be removed.
Special
BMW service tools are needed for timing chain re-
moval and installation procedures. The special tools assure
propertiming of thevaivetrain. Precise marks to set the timing
on the camshafts are not provided for reassembly. Read the
procedures through before beginning the job.
CAUTION-
Special BMW service tools are needed for this procedure.
Read the procedure through before beginning the job. If the
camshafts are notproperly timed, the pistons can contact the
valves.

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I Camshaft Timina Chain
/ Cylinders 5-8
Timing chains, installing
(M62 engine to 911 998)
4 The procedure outlined below assumes that the camshafts
are locked in the TDC installation position with special lock-
ing tools as shown earlier.
4 lnspect timing chain sprocltets and chain. Inspect guide rail
and tensioner rail
(arrows) for grooves caused by chain con-
tact. Replace any part that is worn or damaged.
NOTE-
If any sprocl(ets are being replaced due to wear, the chain
should also be replaced.
If the crankshaft sprocket requires
replacement, the oil pump
drive sprocket and chain must be
removed. See
119 Lubrication System for oilpump removal
information.
- If removed, reinstall timing chain tensioning rail, reversing
rail, and guide rail.
If tensioning rail was removed, replace O-ring at tensioning
rail oil guide.
Tightening torque Reversing rail
to engine block 14 Nrn (10 n-lb)
4 lnstall timing chain and intalte sprocket to intake camshaft on
left cylinder head. Center bores of camshaft flange in sprock-
et mounting slots. Install two mounting bolts finger tight.

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11 9-2
Lubrication System
This repair group covers lubrication system troubleshooting
as well as oil pan removal and oil pump replacement.
In 6-cylinder models, removal of the oil pan requires the re-
moval of the exhaust system and some front suspension
components. Those procedures are fully covered in:
180 Exhaust System
210 Clutch
230 Manual Transmission
0 240 Automatic Transmission
310 Front Suspension
320 Steering and Wheel Alignment
NOTE-
Oil change procedure and oil filter replacement are covered
in
020 Maintenance.
CAUTIOG
V8 engines: The oil pump fasteners (including the sprocket
retaining nut) are known to vibrate loose. This can result in oil
starvation and engine failure. Be sure to check oil bolts and
nut tightness whenever the
oilpump is accessible. If any fas-
teners are found to be loose, remove them and reinstall with
Loctite
Band torque to specifications.
Special tools
The engine needs to be properly supported while the front
suspension
subframe is lowered to access the oil pan.
A standard oil pressure gauge may be used for measuring oil
pressure.
Engine support bracket
(Tool No, BMW 00 0 20012011202~2041208)
4 6-cylinder crankshalt rear main seal tools
(Tool No. BMW 00 5 50011
1 1 260)

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-- . - .. . - Lubrication system]
- Remainder of installation is reverse of removal.
Replace self-locking nuts when reinstalling front suspen-
sion components.
Use new oil dipstick tube sealing O-ring.
After adding engine oil, start and run engine. Raise engine
speed to 2,500 rpm until oil pressure warning light goes out
(about 5 seconds).
NOTE-
BMW does not specify a front end alignment following this
procedure.
Tightening torques Front subfrarne to body rail
(M12, use new bolts)
8.8 grade
10.9 grade
12.9 grade 77 Nrn
(57 ft-lb)
105 Nrn (77 ft-lb)
110 Nrn (81 ft-lb)
Stabilizer bar link to stabilizer bar
65 Nrn (48 ft-lb)
Steering shaft universal joint clamping bolt
(use new bolt)
19 Nrn (14 it-lb)
Lower oil pan, removing and installing (V-8)
- The V-8 engine is equipped with a 2-piece oil pan. The fas-
teners in
V-8 engine oil pump assembly, including the
sprocket retaining nut, are known to loosen and fall off into
the oil pan. Be sure to install these fasteners with Loctite
O
or equivalent thread locking product and torque to specifica-
tions.
CAUTION-
It is recommended that the oil pump retaining bolts and oil
pump drive sprocket retaining nut tightening torque be
checkedany time the
oilpan is removed.
- Raise car and place securely on jack stands.
WARNING-
Make sure the car is stable and well supported at all times.
Use a professional automotive lift
orjack stands designed for
- Remove splash shield from under engine.
- Drain engine oil
- On cars with automatic transmission, remove ATF cooler line
brackets from oil pan.

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Lubr~cat~on System r- -
Working at lower rear of engine, remove oil pan retaining
bolts
(arrows).
- If necessary, remove oil cooler bracket from oil pan.
- Remove remaining oil pan bolts. Slide upper section of oil
pan forward to remove.
- Installation is reverse of removal, noting the following:
Clean sealing surfaces of debris.
- Coat joints with Three Bond 1209 O sealant.
Use new gaskets.
Install all oil pan bolts first, installing bolts at transmission
end without preload.
Tighten oil pan bolts at front end, then tighten bolts at rear
of engine.
Be sure to reinstall all oil
pump fasteners, including the
sprocl - After adding engine oil, start and run engine. Raise engine
speed to
2,500 rpm until oil pressure warning light goes out
(about
5 seconds).
Tightening torques
AIC drive belt tensloner
M6 10 Nm (7.5 it-lb)
M8 24 Nm (18 ft-lb)
Front axle
subframe to chassis
(Use new fasteners) 77 Nm (57 ft-lb)
Oil drain
line to upper oil pan 30 Nm (22 ft-lb)
Oil pump to crankcase 34 Nm (25 ft-lb)
Oil pan fasteners
(upperllower)
M6 8.8 10 Nm (7.5 ft-lb)
M6 10.9 (replace)
I2 Nm (9 ft-lb)
M8 8.8 22 Nm (16 ft-lb)
Steering column universal joint to
steering box (replace) 19 Nm (14 ft-lb)
Oil pressure warning switch, replacing
(&cylinder and V-8)
- In all models, the oil pressure warning switch is located at the
base of the oil filter housing.

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Lubrication System
- Lower front suspension and remove oil pan, as described
earlier, to gain access to oil pump.
Remove oil pump
sprocket mounting nut (left-hand thread)
(arrow). Lift sprocket off together with drive chain.
Engines produced to 9/98: Remove oil pump with pick-up
tube. Pick-up tube is bolted to side of oil pump.
Engines produced from 9/98 to 01/00: Remove pick-up
tube, scraper tray and oil pump as a unit.
Engines produced from 01/00: Remove oil pump pick-up
tube bolts and remove pick-up tube before removing pump.
Remove mounting bolts from oil pump. Withdraw pump.
NOTE-
Record location of any spacers between pump and engine
bloclc Note positions of locating dowels.
- Remove cover from oil pump and check for wear or scoring.
Spin oil pump shaft and
check that gears turn smoothly. Re-
place pump if gears spin with difficulty
orany wear is present.
- Inspect oil pressure relief valve as described later.
- Installation is reverse of removal, noting the following:
Replace pick-up tube O-ring (if applicable).
- Align sprocket splines to oil pump shaft spl~nes before
tightening sprocket nut.
- After adding engine oil, start and run engine. Raise engine
speed to 2,500 rpm until oil pressure warning light goes out
(about 5 seconds).
Tightening torques Oil drain plug to oil pan 25
Nm (18 ft-lb)
Oil pan to engine
bloclc
M6 (8.8 grade)
M6 (10.9 grade)
M8 (8.8 grade)
10 Nm (89 in-lb)
12
Nrn (9 ft-lb)
22 Nm (16 ft-lb)
Oil pump sprocket to oil pump shait
(M10 x 1) (left hand thread)
25 Nm (1 8 it-lb)
Oil pump to crankcase (ME) 22 Nm (1 6 it-lb)
Oil pump pickup tube to cranltcase (M6) 10 Nm (89 in-lb)

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Warnings and cautions
Obse~e the following warnings and cautions when worlting
on the cooling system.
WARNING -
. At normal operating temperature the cooling system is
pressurized. Allow the system to cool as long as possible
before opening (a minimum of one hour), then release the
cap slowly to allow safe release ofpressure.
a Releasing the coolant system pressure lowers the cool-
ant boilingpoint and the coolant may boil suddenly. Use
1 heavy and wear eye and face protection to
guard against scalding.
Use extreme care when draining and disposing of en-
gine coolant. Coolant is poisonous and lethal to hu-
mans andpets. Pets are attracted to coolant because
of its sweet smell and taste. Seek medical attention im-
mediately if coolant is ingested.
CAUTIOG
Avoid adding cold water to the coolant while the engine is
hot or overheated. If it is necessary to add coolant to a
hol
system, do so only with the engine running and coolanl
pump turning.
To avoid excess silicate gel precipitation in the cooling
system and loss of cooling capacity, use BMW coolant
or equivalent low silicate antifreeze.
a If oil enters the cooling system, the radiator, expansion
tank and heating circuit must be flushed with cleaning
agent. BMW recommends removal of the radiator and
expansion
tank to flush.
When
worlcing on the cooling system, cover the alter-
nator to protect it against coolant drips.
Prior to disconnecting the battery, read the battery dis-
connection cautions given in
001 General Warnings
and Cautions.
Begin the diagnosis of cooling system problems with a thor-
ough visual inspection.
If no visual faults are found, it is rec-
ommend that the engine control module (ECM) fault memory
be checked for stored diagnostic trouble codes
(DTCs) using
BMW scan tool
DlSplus or equivalent.