Hyundai HDF 50-7S, Service Manual

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ADJUSTMENT AND OPERATION
13-2
1. Adjusting engine
1.1 Inspecting and adjusting valve clearance
Inspect and adjust the valve clearance when the engine is
cold.
1.1.1 Inspecting valve clearance
(1)
Inspect the valve clearance for all cylinders in the firing
order by turning the crankshaft to the specified degrees
in the normal direction (clockwise when viewed from
engine front side) to bring each piston to top dead
center on the compression stroke.
Note: To turn the crankshaft, fit a socket and ratchet handle
on the crankshaft pulley nut.
(2)
When the No. 1 piston is at top dead center on the
compression stroke, the notch mark on the periphery of
the damper is aligned with the pointer on the timing
gear case, and neither the inlet valve nor the exhaust
valve is not lifted off its seat by the push rod.
(3)
Insert a thickness gauge between the rocker arm and
valve cap to inspect the clearance.
Turning engine
Determining top dead center of No. 1 cylinder
compression stroke
1.1.2 Adjusting valve clearance
(1)
Insert the feeler gauge of the specified thickness
between the rocker arm and valve cap, then adjust the
clearance by turning the screw in either direction so that
the gauge is gripped softly between the rocker arm and
bridge cap.
(2)
After adjusting the clearance, tighten the lock nut
firmly, and inspect the clearance again.
Adjusting valve clearance
Item Standard
Valve clearance
(when engine is cold)
Inlet
0.25 mm [0.0098 in.]
Exhaust
0
40
Firing order
(cylinder No.):
1-5-3-6-2-4
Turning angle:
120°
Turning socket
P/N:58309-73100
Adjusting screw
Lock nut
0.25 mm [0.0098 in.]
20 ± 2 N·m
{2 ± 0.2 kgf·m}
[14.5 ± 1.4 lbf·ft]
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