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De skrur først 2 stk Cylinder Head Guide Studs (VM.1009) i 12mm hullene på hver topp. Der kan man jo bruke de gamle topplokksboltene og kutte av hodene hvis man har bytta boltene. Ja det står jo at boltene skal byttes faktisk, men på VM båtmotorn min kan de brukes 3 ganger. Pussig.
Pass på at toppene er linet opp rett mot toppakningen. Manifoldene trekkes jo til med 5Nm for å line opp toppene.
CAUTION: The cylinder head gasket is to be
installed DRY. DO NOT use a gasket sealing compound
on the gasket.
(2) Install cylinder head alignment studs VM.1009.
(3) After determining the correct head gasket
thickness, clean the block and head mating surfaces,
place the engine cylinder head gasket over the alignment
studs.
(4) Place the engine cylinder head over the alignment
studs.
CAUTION: New cylinder head bolts must be used.
(5) Tighten the engine cylinder head bolts in
sequence according to the following procedure (Fig.
67) :
a. The threads and underside heads of the bolts
should be lubricated. Use the cylinder head alignment
studs tool number VM-1009. Position the heads
on the block and secure with the twelve large center
bolts and spacers (clamps), finger tight only.
b. Ensure that the various clamps are installed
correctly and the head gasket remains in it’s proper
position, completely covered. Then, lubricate and
install the ten small bolts, also finger tight.
(6) Install the intake and exhaust manifolds with
a new gasket, partially tightening the nuts to a maximum
of 5 N·m (44 in. lbs.). This will align the heads.
Refer to Group 11, Exhaust System and Turbocharger
for the proper procedure.
(7) Then, tighten the 14mm bolts with special tool
VM.1019 in the following manner: (Bilde)
( 8 ) 1st Phase: Tightening Head Bolts (Fig. 67).
Central bolts (A-L): Tighten all bolts, starting with
bolt I then J-K-L-A-B-C-D-E-F-G-H, to 30 N·m.
Tighten all bolts an additional 70°, starting with bolt
A and continuing in alphabetical order. Finally,
tighten all bolts an additional 70°, starting again
with bolt A and continuing in alphabetical order.
(9) Tighten the 12mm bolts in the following manner:
(10) Side bolts (M1-M2): Tighten M1 bolts to 30
N·m, then rotate them 85° (65). Tighten M2 bolts to
30 N·m, then rotate them 85° (65).
NOTE: If vehicle is equipped with A/C do not install
A/C lines to compressor and charge A/C till Phase 2
is complete.
(11) 2nd Phase: After 20 minutes of engine operation
at operating temperature, allow engine to cool
down completely. Then retorque the head bolts as follows:
(12) Central bolts A-L: Completely back off bolts
one-by-one and then retighten to 30 N·m plus 130°
(65°). Then proceed in the same way, bolt by bolt,
following alphabetical order, as indicated.
(13) Side bolts M1-M2: Without slackening,
torque bolts M1 then bolts M2 to 90 N·m (66 ft. lbs.).
(14) Torque intake nuts to 28 N·m (20 ft. lbs.) and
exhaust manifolds nuts to 32 N·m (24 ft. lbs.) after
completing the cylinder head torquing procedure.
(15) Install the oil feed lines for the rocker arm
assemblies. Torque oil feed lines to 13 N·m (115 in.
lbs.) (Fig. 68).
(16) Install the oil feed line retaining clip at rear
of the cylinder head (Fig. 69). Torque bolt to 5.5 N·m
(4 ft. lbs.).
(17) Install the push rods. (Fig. 70).
WARNING: During the installation of the rocker arm
assemblies it is possible to cause valve interference
between the piston and valve if the piston is
near Top Dead Center (TDC). This is due to the slow
bleed down rate of the tappets when adjusting the
rocker arm assemblies. Follow the procedure below
to ensure that engine damage does not occur.
² Install the rocker arm assemblies in the same
order as removed (Fig. 70
Og så fortsetter det videre... osv osv til punkt 43.
TIL SLUTT EN OVERRASKELSE:
NOTE: The one piece steel type head gasket does
not require retorqueing.Boka til VM båtmotoren min beskriver etterstramming av toppene etter 100 timer. Boka beskriver separat toppakning for hver topp.
Min motor er ett år nyere enn boka fra -97 og jeg har 2 toppakninger istedenfor 6, altså en pakning pr 3 sylindre.
Interessant å vite om det gjelder det samme for den som for bilmotorversjonen, altså ingen etterstramming etter 100 timer.
Emne: Bytting av topp på WJ Mulig "Write Up" (Lest 4177 ganger)