
ENGINE - K SERIES KV6
OVERHAUL 12-3-97
21.Remove valve stem oil seal using LRT-12-071.
Discard stem seal.
22.Repeat procedure for remaining valves,
keeping components in their fitted order.
Inspect
1.Clean camshafts, bearing running surfaces in
carrier and cylinder head, carrier and cylinder
head mating faces.
2.Inspect camshafts and replace camshafts if
scored, pitted or excessively worn.
3.Position camshafts in cylinder head and place
Plastigauge across each journal.
CAUTION: Ensure camshafts are in their
correct fitted locations. Camshafts are
colour coded - Inlet - Orange; Exhaust -
Blue.
4.Refit camshaft carrier, fit bolts and using
sequence shown, tighten to 10 Nm (7.5 lbf.ft).
Do not rotate camshafts.5.Using the sequence shown, progressively
loosen and remove camshaft carrier bolts.
Release and remove camshaft carrier from
cylinder head.
6.Measure widest part of Plastigauge on each
journal.
+ GENERAL DATA, Engine - KV6
Petrol.
7.If clearance is excessive, fit new camshafts and
repeat check. If clearance is still excessive
renew cylinder head.
8.Remove all traces of Plastigauge using an oily
rag.
9.Clean sealing surfaces of cylinder heads.
Clean inlet and exhaust manifold mating faces.
CAUTION: Do not use a metal scraper.
10.Decarbonise combustion areas of cylinder
heads
11.Blow out all oilways and coolant passages.
12.Check cylinder head for damage, pay particular
attention to sealing faces.
M12 6889
LRT-12-071
mm.025.038.051.076
M12 6887

ENGINE - K SERIES KV6
12-3-98 OVERHAUL
13.Check cylinder head face for warping, across
centre and from corner to corner.
+ GENERAL DATA, Engine - KV6
Petrol.
14.Check cylinder head height.
+ GENERAL DATA, Engine - KV6
Petrol.
Note: Provided that cylinder head height is kept
within limits, cylinder heads may be refaced.
15.Check condition of valve springs and measure
free length of springs.
+ GENERAL DATA, Engine - KV6
Petrol.16.Remove carbon deposits from exhaust valve
guides using a 6 mm diameter reamer inserted
from combustion side of cylinder head.
17.Remove carbon from inlet valve guides, inlet
and exhaust valves and valve seat inserts.
Remove all loose carbon on completion.
18.Check and record existing valve stem
diameters 'A', replace any valve with stem
diameter less than specified.
+ GENERAL DATA, Engine - KV6
Petrol.
19.Check inlet and exhaust valve to guide
clearances 'B' using the following procedures.

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

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).

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.

ENGINE - K SERIES KV6
12-3-108 OVERHAUL
4.Remove Torx screw securing idler pulley to
front mounting plate and remove pulley.
5.Release alternator battery lead terminal cover,
loosen terminal nut and disconnect lead from
terminal
6.Disconnect multiplug from alternator.
7.Remove lower bolt and upper nut and bolt
securing alternator to front mounting plate.
8.Release alternator and remove.9.Remove 3 bolts securing camshaft timing belt
LH rear cover and remove cover.
10.Remove inlet manifold chamber - if fitted.
+ MANIFOLDS & EXHAUST SYSTEMS
- K SERIES KV6, REPAIRS, Seals - inlet
manifold chamber - up to 03MY.
11.Remove 2 bolts securing RH rear timing belt
cover heat shield to cylinder head; remove heat
shield.
12.Remove 3 bolts securing RH rear timing belt
cover; remove cover.
M12 6694

ENGINE - K SERIES KV6
OVERHAUL 12-3-111
27.Remove 5 bolts and 2 pillar bolts securing
engine front mounting plate to cylinder block.
28.Remove 2 bolts securing IRD support bracket
to engine front mounting plate.
29.With care, release and remove front mounting
plate from engine.
30.Fit a suitable 1.5 mm diameter pin through hole
in tensioner body and into hole in plunger.
NOTE: If holes in body and plunger are not
aligned, move tensioner backplate using a
broad bladed screwdriver; this will move the
plunger sufficiently to align the holes and allow
the pin to be inserted.31.Remove and discard 2 Patchlok bolts securing
tensioner to cylinder block and remove
tensioner.
CAUTION: Exercise great care when
removing bolts, do not apply excessive
torque. If bolts appear to be seized, apply
suitable anti-seize lubricant prior to
removing bolts. DO NOT loosen Allen screw
securing tensioner pulley.
32.If camshaft timing belt is to be refitted, mark
direction of rotation on timing belt before
removal.
33.With care, ease camshaft timing belt from
gears using fingers only and remove timing
belt.
CAUTION: Do not rotate crankshaft or
camshafts with timing belt removed.
CAUTION: Camshaft timing belt must be
replaced if cylinder head is to be removed or
new drive gears, tensioner or coolant pump
are to be fitted. Camshaft timing belts must
be stored and handled with care. Always
store a camshaft timing belt on its edge with
a bend radius greater than 50 mm (2.0 in).
Do not use a camshaft timing belt that has
been twisted or bent double as this will
damage the reinforcing fibres. Do not use a
camshaft timing belt if debris other than belt
dust is found in timing belt covers. Do not
use a camshaft timing belt if partial engine
seizure has occurred. Do not use a
camshaft timing belt if mileage exceeds
72,000 km (45,000 miles). Do not use an oil
or coolant contaminated timing belt, cause
of contamination must be rectified.
34.Remove and discard LH and RH exhaust
camshaft cap seals.

ENGINE - K SERIES KV6
12-3-112 OVERHAUL
35.Position tools LRT-12-196 to LH and RH front
inlet camshaft gears and into the end of each
exhaust camshaft.
CAUTION: Special tools must be fitted when
tightening or loosening gear retaining bolts,
otherwise damage to camshafts may occur.
36.Remove and discard bolts retaining front inlet
camshaft gears to camshafts.
37.Remove tools LRT-12-196 from both inlet
camshaft gears and exhaust camshafts.
38.Remove camshaft drive gears and hub
assemblies.
Refit
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.
1.Clean camshaft gears and hubs, crankshaft
gear, tensioner and water pump pulleys.
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.
2.Fit hubs to camshaft gears and fit gears to
camshafts.
3.Fit new camshaft gear bolts; tighten bolts
sufficiently to allow gears to rotate without
tipping.4.Position timing belt to crankshaft gear.
NOTE: To prevent the timing belt from
disengaging from the crankshaft gear when
fitting, fit a suitable wedge between the belt and
oil pump belt guard.
5.Fit tool LRT-12-197 into each exhaust
camshaft in turn.
6.Using assistance, rotate each exhaust
camshaft slightly and align timing marks on LH
and RH rear camshaft gears.
7.Remove tool LRT-12-197.
8.Fit tools LRT-12-175 to LH and RH rear
camshaft gears.
9.Rotate both front camshaft gears fully
clockwise as viewed from front of engine.
10.Using fingers only, fit timing belt to gears,
starting at the crankshaft gear and working in
an anti-clockwise direction, keeping the belt run
as taut as possible and turning the camshaft
gears only a minimum amount anti-clockwise to
fit timing belt.
CAUTION: Gears must not be rotated anti-
clockwise more than one tooth.