Page 268 of 1007
ENGINE - K SERIES KV6
OVERHAUL 12-3-91
Cylinder head gasket - RH
$% 12.29.03.01
Remove
1.Remove inlet manifold chamber.
+ MANIFOLDS & EXHAUST SYSTEMS
- K SERIES KV6, OVERHAUL, Seals -
manifold chamber - up to 03MY.
2.Remove and discard camshaft timing belt.
+ ENGINE - K SERIES KV6,
OVERHAUL, Camshaft timing belt.
3.Release RH HO2S multiplug from coolant rail
bracket and disconnect multiplug.
4.Using sequence shown, loosen then remove 4
nuts securing RH exhaust manifold to cylinder
head.
5.Remove exhaust manifold, remove and discard
gasket.6.Remove 4 bolts securing RH front timing belt
cover backplate to cylinder head and remove
backplate.
7.Remove RH camshaft cover gasket.
+ ENGINE - K SERIES KV6, REPAIRS,
Camshaft cover gasket - RH.
8. Up to 03MY: Remove 3 nuts and 3 bolts
securing ignition coils to LH inlet manifold and
release coil earth lead.
9. Up to 03MY:Remove ignition coils and position
aside.
M30 0996
Page 271 of 1007

ENGINE - K SERIES KV6
12-3-94 OVERHAUL
16.Position injector protection cover - if fitted to RH
fuel rail and secure injector harness to
protection cover or fuel rail with clips.
17.Fit bolts securing fuel rail to inlet manifolds and
tighten to 9 Nm (7 lbf.ft).
18.Connect coolant bleed hose to inlet manifold
and secure with clip.
19. Up to 03MY:Position ignition coils to LH inlet
manifold.
20. Up to 03MY:Position earth lead, fit nuts and
bolts securing ignition coils to LH inlet manifold
and tighten to 9 Nm (7 lbf.ft).
21.Clean camshaft timing belt cover backplate
bolts and apply sealant, Part No. STC 50552 to
the first 3 threads.
22.Position backplate, fit and tighten bolts to 9 Nm
(7 lbf.ft).
23.Fit new camshaft timing belt.
+ ENGINE - K SERIES KV6,
OVERHAUL, Camshaft timing belt.
24.Clean exhaust manifold and mating face on
cylinder head.
25.Fit new exhaust manifold gasket. Position
exhaust manifold, fit nuts and using sequence
shown, tighten to 45 Nm (33 lbf.ft).
26.Connect RH HO2S multiplug, secure multiplug
in coolant rail bracket.
Cylinder head - decarbonise
$% 12.29.19
Remove
1.Remove cylinder head gaskets.
+ ENGINE - K SERIES KV6,
OVERHAUL, Cylinder head gasket - LH.
+ ENGINE - K SERIES KV6,
OVERHAUL, Cylinder head gasket - RH.
Disassembly
1. LH Cylinder head: Remove 3 bolts securing
LH rear timing belt cover and remove cover.
2. RH Cylinder head: Remove 2 bolts securing
RH rear timing belt cover heat shield to cylinder
head.
3. RH Cylinder head:Remove 3 bolts securing
RH rear timing belt cover; remove cover.
M12 6880
M12 6694
Page 306 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
REPAIRS 18-3-1
ENGIN E MANAGEMENT SY STEM - SIEMENS REPAIRS
Spark plugs - up to 03MY
$% 18.20.02
Remove
1.Disconnect battery earth lead.
2.Remove engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3. RH bank only: Release locking clips and
disconnect multiplugs from plug top coils.
4. RH bank only: Remove 6 bolts securing plug
top coils to RH camshaft cover and remove
coils.
5. LH bank only: Noting their fitted positions,
disconnect ht leads.
6.Using a 16 mm plug socket, remove spark
plugs from both cylinder heads.Refit
1.Set gap of each new spark plug to 1.00 mm.
2.Fit spark plugs and tighten to 25 Nm (18 lbf.ft).
3. LH bank only: Connect ht leads.
4. RH bank only: Fit plug top coils to spark plugs.
5. RH bank only: Fit bolts securing plug top coils
to RH camshaft cover and tighten to 9 Nm (6.5
lbf.ft).
6. RH bank only: Connect multiplugs to plug top
coils and secure with locking clips.
7.Fit engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
8.Connect battery earth lead.
Page 307 of 1007
ENGINE MANAGEMENT SYSTEM - SIEMENS
18-3-2 REPAIRS
Spark plugs - from 03MY
$% 18.20.02
Remove
1.Disconnect battery earth lead.
2.Remove the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Release locking clips and disconnect
multiplugs from plug top coils.
4.Remove 6 bolts securing plug top coils to
cylinder heads.
5.Pull to release and remove 6 plug top coils from
cylinder heads.
6.Using a 16 mm plug socket, remove spark
plugs from cylinder heads.Refit
1.Check and if necessary set spark plug gap.
+ GENERAL DATA, Engine - KV6
Petrol.
2.Fit spark plugs and tighten to 25 Nm (18 lbf.ft).
3.Apply a rubber lubricant to plug top coil lower
seals and fit coils fully into cylinder heads.
4.Fit bolts securing plug top coils and tighten to
10 Nm (7 lbf.ft).
5.Connect and secure multiplugs to plug top
coils.
6.Fit the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
7.Connect battery earth lead.
Page 308 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
REPAIRS 18-3-3
Coil - each - LH bank - up to 03MY
$% 18.20.46
Remove
1.Disconnect battery earth lead.
2.Remove engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Release ht lead from plug top coil.
4.Release locking clip and disconnect multiplug
from plug top coil.
5.Remove nut, release earth lead, remove bolt
securing plug top coil to LH inlet manifold and
remove coil.
Refit
1.Fit plug top coil to LH inlet manifold, position
earth lead, fit and tighten nut and bolt to 9 Nm
(6.5 lbf.ft).
2.Connect multiplug to plug top coil and secure
with locking clip.
3.Connect ht lead to plug top coil.
4.Fit engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
5.Connect battery earth lead.
Coil - each - LH bank - from 03MY
$% 18.20.46
Remove
1.Disconnect battery earth lead.
2.Remove the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Withdraw multiplug lock, release and
disconnect plug top coil multiplug.
4.Remove bolt securing plug top coil to camshaft
rocker cover.
5.Remove plug top coil from camshaft rocker
cover.
Refit
1.Apply a rubber lubricant to plug top coil, lower
seal.
2.Fit plug top coil to camshaft rocker cover, fit bolt
and tighten to 5 Nm (3.7 lbf.ft).
3.Fit and secure plug top coil multiplug.
4.Fit the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
5.Connect the battery earth lead.
Page 309 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
18-3-4 REPAIRS
Coil - each - RH bank - up to 03MY
$% 18.20.47
Remove
1.Disconnect battery earth lead.
2.Remove engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Release locking clip and disconnect multiplug
from plug top coil.
4.Remove 2 bolts securing plug top coil to RH
camshaft cover.
5.Release and remove plug top coil from spark
plug.
Refit
1.Position and fit plug top coil to spark plug.
2.Fit bolts securing plug top coil to RH camshaft
cover and tighten to 9 Nm (6.5 lbf.ft).
3.Connect multiplug to plug top coil and secure
with locking clip.
4.Fit engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
5.Connect battery earth lead.
Coil - each - RH bank - from 03MY
$% 18.20.47
Remove
1.Disconnect battery earth lead.
2.Remove the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
3.Withdraw multiplug lock, release and
disconnect plug top coil multiplug.
4.Remove bolt securing plug top coil to camshaft
rocker cover.
5.Remove plug top coil from camshaft rocker
cover.
Refit
1.Apply a rubber lubricant to plug top coil, lower
seal.
2.Fit plug top coil to camshaft rocker cover, fit bolt
and tighten to 5 Nm (3.7 lbf.ft).
3.Fit and secure plug top coil multiplug.
4.Fit the engine acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
5.Connect the battery earth lead.
Page 324 of 1007
FUEL DELIVERY SYSTEM - PETROL
ADJUSTMENTS 19-2-3
Fuel system - depressurise - KV6 - NAS
$% 19.50.02
Check
1.Remove acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
2. Up to 03MY: Remove nut and bolt securing coil
and position coil aside.
3.Remove schraeder valve cap.
4.Position absorbent cloth around fuel feed pipe
connection to collect spillage.
WARNING: The spilling of fuel is
unavoidable during this operation. Ensure
that all necessary precautions are taken to
prevent fire and explosion.5.Connect adapter LRT-19-006 to schraeder
valve.
6.Position opposite end of adapter LRT-19-006
into container, turn tap to release pressure.
7.Remove adapter LRT-19-006 from schraeder
valve.
8.Fit cap to schraeder valve.
9. Up to 03MY: Fit and tighten nut and bolt
securing coil.
10.Fit acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
Page 326 of 1007

FUEL DELIVERY SYSTEM - PETROL
ADJUSTMENTS 19-2-5
Fuel system - pressure test - KV6 - NAS
$% 19.50.13
Remove
1.Remove acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
2.Position absorbent cloth beneath fuel rail.
WARNING: Fuel vapour is highly flammable
and in confined spaces is also explosive
and toxic. Always have a fire extinguisher
containing foam, CO
2, gas or powder close
at hand when handling or draining fuel.
3. Up to 03MY: Remove nut and bolt securing coil
and position coil aside.
4.Connect adaptor LRT-19-006, to pressure
gauge LRT-19-004 .
5.Remove schraeder valve cap.
6.Connect pressure gauge to fuel rail schraeder
valve.
7.Start engine. Pressure at idle = 3.4 bar. If
pressure is below 3.4 bar, suspect the following
in order: fuel hoses, filter, regulator and pump.
Refit
1.Stop engine.
2.Disconnect pressure gauge LRT-19-006 and
adapter LRT-19-004 from fuel rail.
3. Up to 03MY: Fit and tighten nut and bolt
securing coil.
4.Fit acoustic cover.
+ ENGINE - K SERIES KV6, REPAIRS,
Cover - engine acoustic.
Fuel system - pressure test - K1.8
$% 19.50.13
Check
1.Disconnect battery earth lead.
2.Position absorbent cloth beneath fuel pipe to
catch spillage.
WARNING: The spilling of fuel is
unavoidable during this operation. Ensure
that all necessary precautions are taken to
prevent fire and explosion.
3.Disconnect fuel pipe from inlet manifold.
4.Connect LRT-19-004A to manifold and fuel
pipe.
Note:: LRT-19-004X can be used as an
alternative.
5.Connect battery earth lead.
6.Start engine. Pressure at idle = 3.6 bar ± 0.2
bar.
7.Stop engine. If pressure is out of tolerance
suspect the following in order: fuel hoses, filter
and pump.
8.Remove plug, reconnect vacuum hose and
secure hose with clip.
9.Disconnect battery earth lead.
10.Disconnect LRT-19-004A from fuel pipe and
inlet manifold.
11.Connect fuel pipe to manifold.
12.Connect battery earth lead.
LRT - 19 -004A
M19 3675