Page 277 of 1007

ENGINE - K SERIES KV6
12-3-100 OVERHAUL
31.Check that fitted height of valve guide, 'A', is
6.00 mm (0.24 in).
32.Check condition of valve seats and existing
valves that are to be re-used.
33.Renew valve seat inserts as necessary.
CAUTION: Do not damage counterbore
when removing insert.
34.Cool replacement valve seat inserts using
liquid nitrogen and press into cylinder head in
one continuous operation.
CAUTION: Do not heat cylinder head.
Inserts must not stand proud of combustion
face on completion of cutting operation.
35.Cut valve seats using a suitable pilot and the
following cutters:
l15° - To cut first angle
l45° - Make final cut and remove any burrs
l60° - To narrow seat and obtain correct
valve seat width
36.Check valve seat width and face angle:
lSeat width - 'A' - Inlet = 1.2 mm (0.05 in);
Exhaust = 1.6 mm (0.06 in)
lValve face angle - 'B' - Inlet and exhaust =
45°
37.Lap each valve to its seat using grinding paste.38.Apply Prussian Blue to valve seat, insert valve
and press it into position several times without
rotating. Remove and check valve for even and
central seating: seating position shown by
Prussian Blue should be in the centre of valve
face: a: High towards stem, increase 60° cut
and restore seat width. b: Low towards edge,
increase 45° cut and restore seat width. Lap
and recheck valve seating.
39.Check valve stem fitted height - 'A'.
+ GENERAL DATA, Engine - KV6
Petrol.
CAUTION: If valve stem fitted height is
above service limit, fit new valve and re-
check. If still over limit, renew valve seat
insert.
40.Clean valve springs and lubricate valves.
Reassembly
1.Lubricate new valve stem oil seals with clean
engine oil.
2.Using tool LRT-12-071 fit new valve stem oil
seals.
3.Fit valves.
M12 7894
A
Page 278 of 1007

ENGINE - K SERIES KV6
OVERHAUL 12-3-101
4.Fit spring and spring cap.
5.Position LRT-12-034 and adapter LRT-12-
034/1to spring cap and compress valve spring.
6.Fit collets.
7.Release valve spring and remove tool LRT-12-
034.
8.Using a wooden dowel and mallet, lightly tap
top of each valve two or three times to seat
valves and collets.
9.Thoroughly clean and lubricate hydraulic
tappets with clean engine oil. Fit hydraulic
tappets to original bores in cylinder head.
10.Ensure that mating faces of camshaft carrier
and cylinder head are clean and dry.
11.Lubricate camshafts and bearing journals with
clean engine oil.
12.Position camshafts in cylinder head with rear
timing gear drive slots in each camshaft facing
towards the centre as shown.
CAUTION: Ensure camshafts are in their
correct fitted locations. Camshafts are
colour coded - Inlet - Orange; Exhaust -
Blue.13.Apply continuous thin beads of sealant, Part
No. STC 4600, to paths on camshaft carrier as
shown. Spread sealant to an even film using a
roller.
CAUTION: To avoid contamination,
assembly should be completed immediately
after application of sealant.
14.Position camshaft carrier, fit and progressively
tighten bolts in the sequence shown to 10 Nm
(7.5 lbf.ft).
Page 279 of 1007

ENGINE - K SERIES KV6
12-3-102 OVERHAUL
15.Noting that the front camshaft oil seals are
black in colour and the rear oil seals are red, fit
new camshaft oil seals using LRT-12-203 and
LRT 12-148A
CAUTION: Oil seals must be fitted dry. Do
not use tool LRT-12-148 for fitting seals.
16.Clean camshaft timing belt cover backplate
bolts and apply sealant, Part No. STC 50552 to
the first 3 threads.
17.Position camshaft timing belt rear cover
backplates to cylinder head, fit and tighten bolts
to 9 Nm (7.5 lbf.ft).
18.Fit spark plugs.
19.Clean rear camshaft gears and mating faces on
camshafts.
CAUTION: If sintered gears have been
subjected to prolonged oil contamination,
they must be soaked in solvent and then
thoroughly washed in clean solvent before
refitting. Because of the porous
construction of sintered material, oil
impregnated in the gears will emerge and
contaminate the timing belts.20.Place gears inverted on a flat surface, with the
locating lugs on the gears positioned as
illustrated.
21.Keeping the timing marks aligned, position
timing belt onto gears.
22.Position LRT-12-195 between the gears, turn
centre nut sufficiently to spread drive belt.
23.Invert gears and timing belt and position LRT-
12-175 to camshaft gears.
24.Check that locating lugs are still aligned and
remove LRT-12-195 from between camshaft
gears.
Page 280 of 1007

ENGINE - K SERIES KV6
OVERHAUL 12-3-103
25.Fit LRT-12-198 alignment pins into the end of
each camshaft.
26.Position timing belt and gears over LRT-12-198
and locate gears onto camshafts.
27.Position LRT-12-197 into the front end of the
exhaust camshaft.
28.With assistance, using a 30 mm socket on LRT-
12-197, turn the exhaust camshaft sufficiently
to align camshaft gears to the drive slots in
each camshaft.29.Remove LRT-12-198 alignment pins and fit
new camshaft gear retaining bolts.
30.Tighten camshaft gear bolts to:
lStage 1 - 27 Nm (20 lbf.ft)
lStage 2 - Further 90°
31.Remove LRT-12-175 from camshaft gears.
32.Remove LRT-12-197 from front end of exhaust
camshaft.
NOTE: Following front or rear timing belt
refitment, it is possible that after rotating the
engine and positioning the crankshaft pulley to
the 'SAFE' position, the timing marks on the
rear timing gears may be misaligned. This
misalignment is acceptable provided that the
timing belt refitting procedure was carried out
correctly.
33.Fit timing belt rear cover and tighten bolts to 9
Nm (7 lbf.ft).
Refit
1.Fit cylinder head gaskets.
+ ENGINE - K SERIES KV6,
OVERHAUL, Cylinder head gasket - LH.
+ ENGINE - K SERIES KV6,
OVERHAUL, Cylinder head gasket - RH.
Page 281 of 1007

ENGINE - K SERIES KV6
12-3-104 OVERHAUL
Oil pump - Overhaul
$% 12.60.32
Remove
1.Remove oil pump gasket.
+ ENGINE - K SERIES KV6, REPAIRS,
Gasket - oil pump.
Disassembly
1.Remove 4 Torx screws securing cover plate to
oil pump body.
CAUTION: Do not allow cover to separate
from pump body.
2.Invert oil pump.
3.Carefully remove cover plate from oil pump
body taking care to ensure that rotors are
retained in pump body.
Note: Cover plate is dowel located.4.Remove and discard cover plate sealing ring.
5.Make suitable alignment marks between inner
and outer rotors and pump body.
6.Remove inner and outer rotors.
7.Clean inner and outer rotors and rotor housing.
8.Fit inner and outer rotors ensuring that
reference marks are aligned.
Inspect
1.Check rotor clearances:
lOuter rotor to body = 0.13 - 0.23 mm
(0.0051 - 0.0091 in)
lInner rotor tip = 0.05 - 0.13 mm (0.002 -
0.005 in)
lInner and outer rotor end-float = 0.04 - 0.09
mm (0.0016 - 0.0035 in)
2.Renew oil pump as an assembly if clearances
are excessive.
Page 282 of 1007

ENGINE - K SERIES KV6
OVERHAUL 12-3-105
3.Remove oil pressure relief valve plug.
Note: If a hexagonal plug and sealing washer
are fitted, discard washer.
4.Remove spring and valve.
5.Check that valve and bore are free from scoring
and corrosion.
Note: Light corrosion may be removed using
grade 600 emery cloth soaked in engine oil.
6.Check free length of spring.
+ GENERAL DATA, Engine - KV6
Petrol.
7.Check that valve slides freely in bore.
CAUTION: If valve is scored, renew relief
valve as an assembly. If valve bore is
scored, renew oil pump as an assembly.Reassembly
1.Clean cover plate and mating face of cylinder
block; ensure bolt holes are clean and dry.
2.Clean running surface on crankshaft.
3.Remove all traces of sealant from relief valve
plug, Torx screws and tapped holes in pump
body.
CAUTION: Do not use a tap.
4.Lubricate relief valve, spring and bore with
clean engine oil.
5.Fit relief valve and spring.
6.If a hexagonal plug and sealing washer were
fitted, fit new sealing washer to plug.
7.Apply sealant, Part No. STC 50552 to plug
threads; fit plug and tighten to 25 Nm (18 lbf.ft).
8.Lubricate pump rotors and recess with clean
engine oil.
9.Fit inner and outer rotors ensuring that
identification mark on outer rotor is facing
outwards and that reference marks are aligned.
10.Lubricate new cover plate sealing ring with
clean engine oil.
11.Fit cover plate seal and cover plate.
12.Apply sealant, Part No. STC 50552 to threads
of Torx screws, fit and tighten screws.
13.Check that pump rotates freely.
Refit
1.Fit oil pump gasket.
+ ENGINE - K SERIES KV6, REPAIRS,
Gasket - oil pump.
Page 283 of 1007
ENGINE - K SERIES KV6
12-3-106 OVERHAUL
Sump - engine oil
$% 12.60.38.01
Remove
1.Drain engine oil.
+ MAINTENANCE, MAINTENANCE,
Engine Oil and Filter – KV6.
2. If fitted:Remove 4 nuts securing engine oil
cooler to mounting bracket and position oil
cooler aside.
3.Remove bolt securing dipstick tube to cylinder
block.
4.Depress and hold down dipstick tube collar;
remove dipstick tube from sump.5.Using sequence shown and noting their fitted
positions, remove 10 bolts securing sump to
lower crankcase.
6.Using a mallet, gently tap sump sideways to
break sealant bond, remove sump.
CAUTION: Do not lever between crankcase
and sump.
M12 7916
M12 6672
Page 284 of 1007

ENGINE - K SERIES KV6
OVERHAUL 12-3-107
Refit
1.Using a suitable cleaning solvent, clean sump
and mating face on lower crankcase. DO NOT
use a metal scraper on sealing surfaces.
2.Apply a 2 mm (0.1 in) bead of sealant, Part No.
STC 4600 along centre of sump flange, then
spread to an even film using a roller.
CAUTION: To avoid contamination,
assembly should be completed immediately
after application of sealant.
3.Position sump, fit bolts and tighten
progressively in the sequence shown to 35 Nm
(26 lbf.ft).
4. If fitted:Position engine oil cooler to sump
mounting bracket, fit and tighten nuts to 25 Nm
(18 lbf.ft).
5.Position dipstick tube to sump and cylinder
block, fit bolt and tighten to 9 Nm (7 lbf.ft).
6.Fill engine with oil.
+ CAPACITIES, FLUIDS,
LUBRICANTS AND SEALANTS,
Lubrication.
Camshaft timing belt
$% 12.65.18.01
Remove
1.Remove 4 bolts securing engine mounting
bracket to engine front plate and remove
bracket.
2.Release and remove ancillary drive belt from
remaining pulleys.
3.Remove 2 bolts securing ancillary drive belt
tensioner and remove tensioner.
M12 6675
10
9
135
8
4
7
26
M86 5264