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Nissan GT-R. Manual - part 89
EM-4
< PRECAUTION >
PRECAUTIONS
1.
Clamp valve stem in a vice.
2.
The valve has a specially-hardened surface. To cut through it,
first remove a half-round section, approximately 30 mm (1.18 in)
long using air-powered grinder until black color is removed and
silver color appears.
3.
Use hacksaw to cut through approximately half the diameter of
valve stem. Make the serration at a point 40 mm (1.57 in) from
the end of valve stem.
4.
Cover the serrated end of the valve with a large shop towel (A).
Strike the valve face end with a hammer, separating it into two
pieces.
5.
Fill a bucket (such as a 20 oil can) with at least 10 (2-1/4
lmp gal) of water. Carefully place the alreadycut (serrated)
valves into the water one-at-a-time using a set of large tweezers
and quickly move away at least 2.7 m (9 ft).
6.
The valves should be placed in a standing position as shown in
the illustration to allow complete reaction. After the bubbling
action has subsided, additional valves can be placed into the
bucket allowing each subsequent chemical reaction to subside.
However, no more than 8 valves should be placed in the same
10 (2-1/4 lmp gal) amount of water. The complete chemical
reaction may take as long as 4 to 5 hours. Remove the valves
using a set of large tweezers after the chemical reaction has
stopped. Afterwards, valves can be disposed as ordinary scrap.
General Precautions
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CAUTION:
After finishing servicing, check that all the tools and waste are stored in a customary place.
Precautions For Engine Service
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DRAINING ENGINE COOLANT
Drain engine coolant and engine oil when the engine is cooled.
A
: Black color
B
: Silver color
c
: 47 mm (1.85 in)
d
: 17 mm (0.67 in)
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a
: 32 mm (1.26 in)
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A
: Bucket (Such as 20
oil can)
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