70É using angle torque tool. Then rotate the bolts an
additional 70É following tightening sequence.
(10) Then, tighten the 14mm bolts with special
tool VM-1018 in the following manner:
(11) Side bolts (M1-M2): Tighten M1 bolts to 30
N´m, then rotate them 85É (65). Tighten M2 bolts to
30 N´m, then rotate them 85É (65).
(12)2nd Phase:After 20 minutes of engine oper-
ation at operating temperature, allow engine to cool
down completely. Then retorque the head bolts as fol-
lows:
(13) Central bolts A-L: Starting from bolt A,
slacken and retorque it immediately to 30 N´m + 65É.
Rotate the bolt an additional 65É. Then proceed in
the same way, bolt by bolt, following alphabetical
order, as indicated.
(14) Side bolts M1-M2:Without slackening,
torque bolts M1 then bolts M2 to 90 N´m (66 ft. lbs.).
(15) Tighten intake nuts to 30 N´m (22 ft. lbs.) and
exhaust manifolds nuts to 30 N´m (22 ft. lbs.) speci-
fied torque after completing Phase 2.
(16) If the engine cylinder head is to be replaced
and the original valves used, measure the valve stem
diameter. Only standard size valves can be used with
a service replacement engine cylinder head unless
the replacement head valve stem guide bores are
reamed to accommodate oversize valve stems.
Remove all carbon buildup and reface the valves.
(17) Tighten oil feed lines for rocker arm assem-
blies and oil pressure switch to 13 N´m (112 in. lbs.).
(18) Install push rods and rocker arm assemblies,
tighten nut to 29.4 N´m (264 in. lbs.).(19) Install fuel injectors use tool VM-1012 (refer
to Group 14, Fuel System).
(20) Install valve cover, tighten nuts to 14.7 N´m
(132 in. lbs.).
(21) Connect crankcase breather hose.
(22) Connect the injector sensor wire connector,
and the glow plug connectors.
(23) Install oil feed line, tighten banjo bolts to 12.7
N´m (108 in. lbs), and oil drain line to turbo.
(24) Install water manifold tighten bolts to 12 N´m
(106 in. lbs.).
(25) Install exhaust pipe to turbo elbow, tighten
bolts to 28 N´m (250 in. lbs.).
(26) Install the support strut from block to turbo-
charger exhaust elbow.
(27) Install EGR tube to EGR valve, tighten bolts
to 26 N´m (19 ft. lbs.).
(28) Install intercooler hoses at intake manifold.
(29) Install coolant pressure bottle and hoses.
(30) Install wiper module. Refer to Group 8K,
Windshield Wiper Unit Installation for procedure.
(31) Install intercooler hose at turbocharger tube.
(32) Install fuel injector lines from the pump to
injectors, tighten nuts to 17.6 N´m (156. lbs.).
(33) Connect the upper radiator hose.
(34) Connect negative cable to battery.
(35) Fill the cooling system. Check for leaks.
WARNING: USE EXTREME CAUTION WHEN THE
ENGINE IS OPERATING. DO NOT STAND IN DIRECT
LINE WITH THE FAN. DO NOT PUT HANDS NEAR
THE PULLEYS, BELTS OR FAN. DO NOT WEAR
LOOSE CLOTHING.
Fig. 33 Engine Cylinder Head Bolt Tightening Sequence
NS/GSENGINE 9 - 59
REMOVAL AND INSTALLATION (Continued)
