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1.05L REVOTORQ ENGINE
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D. VALVES :
1. Check valve leakages by pouring gasoline on
valve head. Gasoline must not seep past valve
seat.
2. Valves with burnt heads, excessive scoring
and wear on stem should be replaced.
3. Check valve seat run out with respect to valve
stem. If it exceeds specified limit replace valve.
No attempt should be made to straighten bent
valves.
4. If valve is free from any other defects except
worn out seat, then only it can be rematched
on valve grinding machine as follows:
Clamp valve on grinding machine jaws as
close as possible to valve head.
Adjust grinding angle on graduated scale to
achieve correct valve seat angle.
Feed valve slowly towards grinding wheel
until wheel just touches valve head.
Grind at low feed until valve seat is just
clean all around.
NOTE
After machining the valve seat, remove the
valve from the grinding machine and check
valve head thickness. The minimum valve
head thickness of the valve is 0.85 mm.
Valve Dimensions
Dimensions (Callout)
Intake Valve
Exhaust Valve
Valve Head Diameter (A)
Ø25.8 ± 0.1 mm
Ø22.6 ± 0.1 mm
Valve Seat Angle
45° + 15’
45° + 15’
Valve Stem Diameter (B)
Ø5.973 ± 0.007 mm
Ø5.953 ± 0.007 mm
Valve Seat Diameter (C)
24.5 mm
20.7 mm
Valve Seat End Distance From Valve
Face (D)
2.00 ± 0.08 mm
2.25 ± 0.08 mm
Maximum Run out of Valve Face with
Respect to Valve Stem
0.1 mm
0.1mm
Maximum Run out of Valve Face with
Respect to Valve Stem (C-B)
0.003 mm
0.003 mm