timing belt LAND ROVER DISCOVERY 1995 User Guide

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REPAIR CAMSHAFT FRONT OIL SEAL
Service repair no - 12.13.07 - Exhaust
Service repair no - 12.13.09 - Inlet
Remove
1.Disconnect battery negative lead.
2.Remove drive belt.
See SECTION 10,
Maintenance, Under Bonnet [Hood]
Maintenance
3.Remove 5 bolts, timing belt upper cover.
4.Remove timing belt upper cover.
5.Remove 5 bolts, timing belt centre cover.
6.Remove timing belt centre cover.
7.Rotate crankshaft to align camshaft gear timing
marks - 90°B.T.D.C.
8.Fit tool LRT-12-058 to lock flywheel.
9.Fit tool LRT-12-060 to lock camshaft gears.
10.Loosen camshaft belt tensioner bolt.
11.Move tensioner away from belt and tighten
tensioner bolt.
12.Remove belt from camshaft gears.

12ENGINE
2
REPAIR 13.Remove 2 bolts securing camshaft gears to
camshafts.
14.Remove tool LRT-12-060.
CAUTION: Do not rotate camshafts.
15.Remove gears noting the 'IN' and 'EXHAUST'
identifying marks.
16.Remove 5 bolts securing timing belt upper
backplate.
17.Remove belt upper backplate.
18.Remove seals using tool LRT-12-063 fit
thrustpad as shown.
Refit
1.Clean sealing area of cylinder head and
camshaft, ensure all traces of rubber are
removed - do not scrape.
2.Using tool LRT-12-064 and LRT-12-072 fit new
camshaft oil seals.
CAUTION: Ensure sealing lip of seal is not
distorted.

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REPAIR
For torque values.See Specifications, torque,
Torque Values
3.Fit timing belt upper backplate and tighten bolts
to the correct torque.
4.Fit camshaft gears noting the 'IN' and
'EXHAUST' identifying marks.
5.Fit, but do not tighten, camshaft gear centre
bolts.
6.Ensure timing marks are aligned.
7.Fit camshaft locking tool LRT-12-060.
8.Tighten camshaft gear bolts to the correct
torque.
9.Fit timing belt.
See Camshaft Drive Belt
10.Adjust timing belt tension.
11.Remove tool LRT-12-058 from flywheel.
12.Fit timing belt centre cover and tighten bolts to
correct torque.
13.Fit timing belt upper cover and tighten bolts to
correct torque.
14.Fit drive belt.
See SECTION 10, Maintenance,
Under Bonnet [Hood] Maintenance
15.Reconnect battery negative lead.INLET - EXHAUST CAMSHAFT REAR OIL PLUG
Remove
1.Remove cylinder head.
2.Lever out, camshaft rear oil seal plug.
Refit
1.Clean plug housing.
2.Fit new plug applying force to outer edge only.
3.Refit cylinder head.

12ENGINE
4
REPAIR CRANKSHAFT FRONT OIL SEAL
Service repair no - 12.21.14
Remove
1.Remove timing belt.
See Camshaft Drive Belt
2.Slide timing gear off crankshaft and remove
drive key.
3.Ensure bore of tool is burr free, fit and tighten
tool LRT-12-073 into crankshaft front oil seal.
4.Using thrustpad, tighten centre screw of tool to
remove oil seal.
5.Remove thrust button from crankshaft.
Refit
1.Use lint free cloth and thoroughly clean seal
recess and running surface on crankshaft. Clean
crankshaft gear and pulley.
2.Lubricate oil seal sealing surfaces with engine
oil.
3.Fit tool LRT-12-070 onto crankshaft.
4.Position new oil seal on crankshaft, drift into
place using LRT-12-069 and remove protector.
5.Fit drive key to crankshaft and slide timing gear
onto crankshaft.
6.Fit and tension timing belt.
See Camshaft
Drive Belt

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REPAIR 22.Raise vehicle
23.Remove 4 nuts securing downpipe to exhaust
manifold.
24.Release downpipe from exhaust manifold.
25.Collect gasket.
26.Release 4 screws and remove spark plug cover.
27.Release spark plug leads from spark plugs and
release from clips. Place aside.
28.Remove camshaft covers.
29.Remove timing belt.
See Camshaft Front Oil
Seal
30.Progressively loosen and remove 10 cylinder
head bolts in sequence shown.
31.Remove cylinder head complete with manifold,
place on blocks to prevent damage.
32.Remove and discard cylinder head gasket.
33.Remove location dowels from cylinder block.
34.Inspect cylinder head for damage, cracks and
burning.
35.Inspect cylinder block. Ensure that the oil
restrictor is clear and fitted below the block face.
36.Clean all traces of gasket material from head
and block mating faces, using release agent and
plastic scraper.
37.Check cylinder head and block faces for
warpage:
Longitudinal warp = 0.1 mm max.
Transverse warp = 0.1 mm max.
Diagonal warp = 0.1 mm max.
38.Decarbonize cylinder head and pistons if
necessary.
39.Clean cylinder head bolt threads with a wire
brush, check for damage, replace if necessary.
40.Check cylinder block threads by running bolts
into threads using fingers only. Clean any tight
threads using M11 x 1.5 mm tap. Remove all
traces of oil from bolt holes.

12ENGINE
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REPAIR Refit
1.Fit location dowels to cylinder head.
2.Fit cylinder head gasket to cylinder block.
3.Using assistance fit cylinder head to cylinder
block.
4.Lubricate cylinder head bolts.
5.Fit and tighten cylinder head bolts to the correct
torque and in the correct sequence.
NOTE: For torque values.See
Specifications, torque, Torque values
6.Fit timing belt.
7.Fit camshaft covers.
8.Fit spark plug leads to spark plugs and secure to
clips.
9.Fit spark plug cover and secure with screws.
10.Fit new gasket and secure downpipe to exhaust
manifold with nuts.
11.Fit bolt securing dipstick tube to coolant rail.
12.Connect 3 vacuum hoses to inlet manifold.
13.Connect fuel to pressure regulator, secure with
clip.
14.Connect fuel injection harness, inlet manifold air
temperature sensor and fuel temperature sensor
multiplugs.
15.Secure engine harness to manifold with bolts.
16.Connect brake servo hose to manifold, secure
with clip.
17.Connect air cleaner hose to throttle housing,
secure with clip.
18.Connect stepper motor and throttle
potentiometer multiplugs.
19.Fit and adjust throttle cable.
20.Connect oxygen sensor multiplug, secure with
cable tie.
21.Connect the bypass and top hose, secure with
clips.
22.Connect coolant temperature sensor multiplugs,
secure with cable tie.
23.Connect hose to heater rail and secure with clip.
24.Connect radiator bottom hose and secure with
clip.
25.Tighten fuel pipe to fuel rail union.
26.Reconnect battery negative lead.

12ENGINE
20
REPAIR
Exhaust only
13.Fit bolts finger tight.
14.Working from the centre outwards, progressively
tighten bolts to the correct torque.
10Nm
Inlet and exhaust
15.Fit spark plug cover to camshaft cover, tighten
screws.CAMSHAFT DRIVE BELT
Service repair no - 12.65.17
Remove
NOTE: If the timing belt is to be removed
from the camshaft gears only, it is not
necessary to remove the drive belt,
crankshaft pulley or timing belt lower cover.
1.Remove drive belt.
2.Remove 5 bolts securing timing belt top cover.
3.Remove top cover.
4.Remove 5 bolts securing timing belt centre
cover.
5.Remove timing belt centre cover.
6.Rotate crankshaft to align timing marks on
camshaft gears - 90°BTDC.

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REPAIR
CAUTION: Never use the camshaft gears,
gear retaining bolts or timing belt to rotate
crankshaft.
7.Fit tool LRT-12-058 to lock flywheel.
8.Position tool LRT-12-060 to lock camshaft gears.
9.Loosen camshaft belt tensioner pulley bolt.
10.Move tensioner to release timing belt tension.
11.Retighten tensioner pulley bolt.
12.Remove 4 bolts securing crankshaft pulley to
crankshaft timing gear.13.Fit tool LRT-12-059 to crankshaft pulley, fit 2
pulley bolts to retain tool.
14.Restrain crankshaft pulley using tool LRT-12-059
and remove crankshaft pulley bolt.
15.Remove bolts securing tool LRT-12-059, remove
crankshaft pulley.
16.Remove timing belt lower cover.
17.If timing belt is to be refitted, mark direction of
rotation of belt.
18.Remove timing belt.

12ENGINE
22
REPAIR
CAUTION: Ease timing belt off gears using
fingers only. Metal levers may damage the
belt and gears. Do not rotate engine with
timing belt removed and cylinder head fitted.
Timing belts must be stored and handled with
care. Always store a timing belt on its edge with a
bend radius greater than 50 mm. Do not use a
timing belt which has been twisted or bent double
as this can fracture reinforcing fibres. Do not use
an oil contaminated timing belt. Although the belt
has a service life of 96,000 miles, 160,000 km, an
existing belt should only be refitted if it has
completed less than 48,000 miles, 80,000 km.
Refit
NOTE: For torque values.See
Specifications, torque, Torque values
1.Clean timing belt gears and pulleys.
2.Clean crankshaft pulley.
CAUTION: If original belt is to be refitted,
ensure direction of rotation mark is facing
correct way.
3.Fit timing belt to gears, starting at the crankshaft
gear and working in an anti-clockwise direction.
CAUTION: Ensure the belt run between the
crankshaft and exhaust camshaft gear is
kept taut during the fitting procedure.
4.Fit timing belt lower cover, tighten 3 bolts to the
correct torque.
5.Fit crankshaft pulley to crankshaft timing gear.
6.Fit tool LRT-12-059 to crankshaft pulley, fit 2
bolts to retain tool.
7.Fit crankshaft pulley centre bolt, and using tool
LRT-12-059 to restrain pulley, tighten bolt to the
correct torque.
8.Remove tool LRT-12-059
9.Fit bolts securing crankshaft pulley to timing
gear, tighten bolts to the correct torque.
10.Remove tool LRT-12-060.Tension belt
1.Loosen timing belt tensioner pulley bolt.
2.Apply
40Nmanti-clockwise torque to inlet cam
pulley bolt and release.
3.Tighten tensioner pulley bolt to the correct
torque.
4.Remove tool LRT-12-058 from flywheel.
5.Fit timing belt centre cover, tighten 5 bolts to the
correct torque.
6.Fit timing belt upper cover, tighten 5 bolts to the
correct torque.
7.Fit drive belt.

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REPAIR CHECK CAMSHAFT DRIVE BELT
Service repair no - 12.65.17
CAUTION: This check must be carried out
at the service intervals specified and
whenever carrying out any repair which
requires the timing belt to be disturbed. Pay
particular attention for signs of belt splitting at
base of teeth.
1.Remove 5 bolts securing timing belt upper cover
2.Remove upper cover.
3.Using a socket and extension bar on the
crankshaft pulley bolt, rotate engine to allow the
timing belt to be inspected.
CAUTION: Do not use camshaft gears or
retaining bolts to rotate engine.
4.Check timing belt condition, renew any belt that
shows signs of oil contamination, cracking,
fraying or splitting at base of teeth.
CAUTION: Cause of oil contamination, if
present, must be rectified.
5.Clean timing belt upper cover.
6.Position upper cover.
7.Fit upper cover securing bolts.