Page 269 of 1007
ENGINE - K SERIES KV6
12-3-92 OVERHAUL
10.Release clip and disconnect coolant bleed 
hose from RH inlet manifold, position hose 
aside.
11.Release injector harness clips from injector 
protection cover - if fitted, or from bosses on 
fuel rail.
12.Remove 2 bolts securing protection cover - if 
fitted and RH fuel rail to RH inlet manifold, 
remove cover.13.Remove 2 bolts securing fuel rail to LH inlet 
manifold.
14.Release injectors from manifolds and carefully 
lay fuel rail and injectors aside.
CAUTION: Always fit plugs to open 
connections to prevent contamination.
15.Using sequence shown, progressively loosen 
and remove 8 cylinder head bolts.
16.Remove cylinder head.
CAUTION: Support both ends of cylinder 
head on blocks of wood.
17.Remove and discard cylinder head gasket.
CAUTION: Do not rotate crankshaft with LH 
cylinder head fitted. 
         
        
        
     
        
        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 274 of 1007

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 
         
        
        
     
        
        Page 288 of 1007

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. 
         
        
        
     
        
        Page 300 of 1007

EMISSION CONTROL
REPAIRS 17-1-9
Thermal valve - exhaust gas 
recirculation (EGR) - Td4 Automatic 
transmission (hot climates) - from 03 MY
$% 17.45.07
Remove
1.Disconnect the battery earth lead.
2.Release thermal valve coolant hose from clips.
3.Position container to collect coolant.
4.Release 3 clips securing coolant hoses to the 
EGR thermal valve.
5.Disconnect coolant hoses from the EGR 
thermal valve and remove the thermal valve.
Refit
1.Position the EGR thermal valve and connect 
coolant hoses.
2.Secure hoses with clips.
3.Fit thermal valve coolant hose into clips.
4.Connect the battery earth lead.
5.Refill the cooling system.
 
 +  COOLING SYSTEM - Td4, 
ADJUSTMENTS, Coolant - drain and refill.
Cooler - EGR - Td4
$% 17.45.40
Remove
1.Disconnect battery earth lead.
2.Remove camshaft cover.
 
 +  ENGINE - Td4, REPAIRS, Gasket - 
camshaft cover.
3.Mark EGR pipe and cooler to aid refit.
4.Loosen clamps EGR pipes to cooler and move 
clamps aside.
5.Remove pipe, EGR cooler to EGR valve.
6.Remove bolt securing fuel rails to support 
bracket.
7.Remove bolt securing turbocharger outlet pipe 
to support bracket.
8.Remove underbelly panel.
 
 +  EXTERIOR FITTINGS, REPAIRS, 
Panel - underbelly.
M170364
 
M17 0283 
         
        
        
     
        
        Page 301 of 1007

EMISSION CONTROL
17-1-10 REPAIRS
9.Remove bolt securing turbo outlet pipe to upper 
coolant rail.
10.Remove 2 bolts securing pipe support bracket 
to engine lifting bracket, remove support 
bracket.
11.Release clip and remove vacuum hose.
12.Remove 3 bolts securing EGR cooler to 
cylinder head and lifting bracket.13.Lift EGR cooler from mounting and position a 
container beneath coolant hoses.
14.Release clips and remove hoses from EGR 
cooler allow coolant to drain.
15.Remove EGR cooler.
Refit
1.Position EGR cooler, connect coolant hoses 
and fit clips.
2.Position  EGR cooler to mounting, fit bolts and 
tighten to 25 Nm (18 lbf.ft).  
3.Position pipe support bracket to engine lifting 
bracket, fit and tighten bolts to 25 Nm (18 lbf.ft). 
4.Fit vacuum hose and tighten clip.
5.Fit bolt securing turbocharger pipe to coolant 
rail and tighten to 25 Nm (18 lbf.ft).
6.Fit underbelly panel.
  +  EXTERIOR FITTINGS, REPAIRS, 
Panel - underbelly.
7.Fit bolt securing turbocharger outlet pipe to 
support bracket and tighten to 10 Nm (7.5 
lbf.ft).
8.Fit bolt securing fuel rails to support bracket 
and tighten to 10 Nm (7.5 lbf.ft).
9.Align EGR pipe to cooler fit clamp, but do not 
fully tighten until camshaft cover is refitted.
10.Fit EGR pipe clamp and tighten screw.
11.Fit camshaft cover.
 
 +  ENGINE - Td4, REPAIRS, Gasket - 
camshaft cover.
12.Connect battery earth lead.
13.Top up cooling system.
 
 +  MAINTENANCE, MAINTENANCE, 
Cooling System and Intercooler. 
         
        
        
     
        
        Page 313 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
18-3-8 REPAIRS
Sensor - intake air temperature (IAT) - 
NAS 
$% 18.30.09
Remove
1.Disconnect multiplug from IAT sensor.
2.Release clip and remove IAT sensor. Discard 
seal.
Refit
1.Clean IAT sensor and mating face.
2.Fit new seal to sensor.
3.Fit IAT sensor and connect multiplug.
Sensor - engine coolant temperature 
(ECT) 
$% 18.30.10
Remove
1.Disconnect battery earth lead.
2.Remove thermostat.
 
 +   COOLING SYSTEM - K SERIES KV6, 
REPAIRS, Thermostat.
3.Disconnect multiplug from coolant temperature 
sensor.
4.Remove coolant temperature sensor and 
discard sealing washer.
5.Remove coolant temperature sensor from 
cylinder block.
6.Remove steel shim and sealing washer from 
temperature sensor, discard sealing washer.
Refit
1.Clean coolant temperature sensor and mating 
face on cylinder block.
2.Fit new sealing washer, then steel shim to 
coolant temperature sensor.
3.Position coolant temperature sensor and 
tighten to 17 Nm (12.5 lbf.ft).
4.Fit thermostat.
 
 +   COOLING SYSTEM - K SERIES KV6, 
REPAIRS, Thermostat.
5.Connect battery earth lead. 
         
        
        
     
        
        Page 316 of 1007

ENGINE MANAGEMENT SYSTEM - SIEMENS
REPAIRS 18-3-11
5.Fit new Torx screws and wave washers, tighten 
Torx screws to 1.5 Nm (1.1 lbf.ft).
6.Connect multiplug to TP sensor.
7.Operate throttle cable cam 2 or 3 times and 
ensure that full travel to the throttle open and 
the throttle closed positions is available.
8.Fit acoustic cover.
 
 +   ENGINE - K SERIES KV6, REPAIRS, 
Cover - engine acoustic.
9.Connect battery earth lead.
NOTE: A ‘throttle initialisation’ procedure 
MUST be carried out using TestBook/T4 
whenever the TP sensor is removed or 
renewed.
Sensor - thermostat monitoring (TM) - 
KV6 - NAS 
$% 18.30.21
Remove
1.Disconnect battery earth lead.
2.Remove coolant expansion tank cap to release 
pressure and refit cap.
WARNING: Since injury such as scalding 
could be caused by escaping steam or 
coolant, do not remove the filler cap from 
the coolant expansion tank while the 
system is hot.
3.Position absorbent cloth under TM sensor to 
collect spillage.
4.Disconnect multiplug from TM sensor.
5.Release and remove sensor. Discard seal.
Refit
1.Clean sensor and mating face.
2.Using a new seal, fit and secure sensor.
3.Connect multiplug to sensor.
4.Remove absorbent cloth.
5.Check for leaks and fill expansion tank to 'MAX' 
mark.
6.Connect battery earth lead.
M18 0764