Daewoo DB58, Руководство по ремонту

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1
2
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Valve Depression
1) Install the valve
①
to the cylinder head
②
.
2) Measure valve depression by the using of
depth gauge or calibrator from the bottom of
cylinder head.
S e a t i n s e r t a n d v a l v e m u s t r e p l a c e i f t h e
measured value was exceeded the specified limit.
When replace of valve, the valve guide must
be surely replaced.
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Width of Valve Contact
1) Inspect the valve contact faces for the
roughness and unevenness.
Smoothly Make valve contact surfaces.
2) Measure width of valve contact.
S e a t v a l v e s e a t i n s e r t m u s t r e p l a c e i f t h e
measured value was exceeded the specified limit.
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Replacement of Valve Seat Insert
<Removal of Valve Seat Insert>
1) Arc weld entire inside circumference of the
valve seat insert
②
.(See figure)
2) Cool valve seat insert for a few minutes
to be easily pulled out the valve insert.
3) Pull out the valve seat insert by the using of
screw driver.
4) Carefully remove the carbon and other alien
substance from the cylinder head insert bore.
<Installation of Valve Seat>
1) Carefully place Jig (1).
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CAUTION
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Contact smoothed face of
valve seat insert.
2) Assemble valve insert as of slowly pressing
againt the jig with the bench press.
(To need press 25000 Kg more)
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CAUTION
� �
D o n o t e x c e s s i v e p r e s s
with tne bench press.
I t m a y b e d a m a g e d t h e
valve seat insert.
EJM2041I
EJM2042I
EJM2043S
1
3
2
EJM2044I
Standard Limit.
Intake and Exhaust Valve Depression 1.0 mm 2.5 mm
Standard Limit
Valve Contact Width 1.5 mm 2.0 mm