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ENGINE
2
2. REPAIR DATA
Valve guide length
38 mm
NOTE
: Other dimensions for valve guide are same as
existing manual.
Valve seat insert OD
Normal
Normal 1
Intake
34.11 x 6
34.41 x 6
Exhaust
31.51 x 6
31.81 x 6
Valve clearance ( Tappet Setting )
Intake
0.2
Exhaust
0.35
NOTE
If the Intake valve clearance found below 0.1±0.025 mm, then adjust the valve clearance to 0.2±0.025 mm
by replacing respective shims.
If the Exhaust valve clearance found below 0.2±0.025 mm, then adjust the valve clearance to 0.35±0.025
mm by replacing respective shims.
Selection of shim
Step 1:
Put master shim of thickness 3 mm on all a valves retainers. Put tappet and cam shaft over it.
Step 2:
Rotate the cam shaft and bring it to TDC position. Then measure the clearance between tappet and cam shaft
lobe for inlet valve with the help of feeler gauge. Note down the clearances.
Step 3:
Remove the TDC plate and again rotate the camshaft and bring it to TDC position. Measure the clearance
between tappet and cam shaft lobe for exhaust valve with the help of feeler gauge. Note down the clearances.
Calculations of shim:
Use the following formulae for selection of shim.
For inlet valve
: S = M + (C – 0.2)
For exhaust valve:
S = M + (C – 0.35)
S = Required shim thickness
M = Thickness of master shim i.e. 3 mm
C= valve clearance measured with the feeler gauge when master shim is placed on valve retainer.
Step 4:
Remove the master shim from retainer. Select proper shim as per calculation from shim box.
A. BELT TENSION VALUES
Alternator belt
: New belt to be re-tensioned to
155±5 Hz
on vehicle after running for 15 min.
For used belt it should be
120 ~ 130 Hz.
AC compressor belt
: New belt to be re-tensioned to
180±5 Hz
on vehicle after running for 15 min.
For used belt it should be
145 ~ 155 Hz.
Timing belt
: Belt tension values should be
70±5 Hz
measured between the span of crank gear and timing gear .