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1.05L REVOTORQ ENGINE
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G. VALVE SEAT INSERT :
1. For removing valve seat inserts from cylinder
head use suitable boring machine. Bore old
insert thin (About 0.5 mm thickness) and then
pry it out.
2. Alternatively use a suitable turning tool to cut
an annular groove into valve seat insert and
then pull it out with a suitable puller. In order
to avoid damaging machined cylinder head
mating surface with crank case, place any soft
protective sheet metal under supports of
puller.
3. Measure valve seat insert bore diameter in
cylinder head.
4. If boring and prying is done carefully without
damaging valve seat insert bore in cylinder
head, fitment of an over size valve seat insert
will not be necessary.
5. Re-machined valve seat insert bore in
cylinder head must be exactly at right angle to
cylinder head mating surface with crank case.
6. All specified dimensions should be strictly
maintained to ensure proper interference of
valve seat insert in its bore.
7. Clean valve seat insert and its bore in cylinder
head thoroughly.
JUST BEFORE INSTALLATION
1. Place valve seat insert in mixture of Methanol
and dry ice for about 20-30 minutes to bring
temperature down to -150ºC.
2. Heat cylinder head to approximately 80ºC in
hot water bath.
3. Install valve seat insert in cylinder head bore
quickly by light hammering.
4. Machine valve seat in cylinder head.
H. HYDRAULIC LASH ADJUSTER :
1. Hydraulic Lash Adjuster supports the pivot
end of the rocker arm while automatically
controlling the rocker arm position to keep it in
contact with the camshafts and valve.
2. The range of the hydraulic lash adjuster
accommodates engine build tolerances;
hence no adjustment is required during
engine assembly. It also compensates for
variation that occurs during the life of the
engine.
For information on HLA and inspection refer
Lubrication section.