4C20 Gasoline Engine Repair Manual
Installation
oil scraper
Valve
cap
ÿ Nominal pressure of inlet valve spring: 597±29N.
(d) Check valve guide
pan: 625±31 N.
ÿ Nominal exhaust valve spring pressure
(1) Measure the inside diameter of the guide bush
(2) Replace the valve spring if the actual pressure is out of range.
ÿ After removal, the valve stem seal must be
me.
10. Valve installation
valve with an internal micrometer.
(a) Return the valve to its original position.
ÿ The inlet valve features a larger disc and a deep groove at the top.
(b) Apply a small amount of engine oil to the
ÿ Limit values: 6.000-6.065 mm
9. Installing the valve stem seal
(a) Lubricate the lip of the valve stem seal with a clean motor
(2) Replace the valve guide if the actual diameter is out of range.
valve nut and insert the valve into the guide sleeve from the side of the
combustion chamber.
(c) Check that the valve moves freely.
8. Valve spring check
oil.
(1) While compressing the valve spring, measure the pressure
of the intake and exhaust valve springs with the compressed
spring length of 27.2 mm and 27.87 mm, respectively.
(b) Install the valve stem seal into the hole in the cylinder head using tools.
Clue:
Clue:
74
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