Great Wall GW491QE, Service Manual

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EM.3-5
7.฀Removal฀of฀shock฀absorber
Two฀bolts฀plus฀the฀shock฀absorber฀may฀be฀dismantled.
8.฀Removal฀of฀thrust฀disk฀and฀camshaft
(a)Two฀bolts฀plus฀the฀thrust฀disk฀may฀be฀dismantled.
(b)Take฀out฀the฀camshaft฀carefully.
Note Do฀ not฀ damage฀ the฀camshaft฀ bear ing.
I nspection฀and฀r epair฀of฀timing฀chain฀and฀camshaft
components
1.฀Check฀the฀camshaft
(a)When฀the฀camshaft฀is฀placed฀on฀a฀V-shape฀steel,฀measure฀the฀radial
runout฀at฀neck฀journal฀on฀the฀center฀of฀camshaft.
Max.฀circumferential฀radial฀runout 0.06฀mm
The฀camshaft฀needs฀to฀be฀changed฀if฀the฀runout฀exceeds฀Max.value.
(b)Measure฀the฀height฀of฀convexity฀of฀camshaft฀using฀amicrometer
Standard฀height฀of฀convexity
A ir ฀inlet฀ por t (38.620 38.720)mm
A ir ฀ exhaust฀por t (38.629 38.729)mm
M in฀ height฀ of฀ convexity
A ir ฀ inlet฀por t 38.26฀ mm
A ir ฀ exhaust฀por t 38.27฀mm
The฀camshaft฀needs฀to฀be฀changed฀if฀the฀height฀of฀convexity฀is฀less฀than
Min.฀value.
(c)Measure฀the฀diameter฀of฀neck฀journal฀using฀a฀micrometer.
Standard฀diameter from฀front฀side
No.฀ 1 (46.459 46.475)mm
No.฀ 2 (46.209 46.225)mm
No.฀ 3 (45.959 45.975)mm
No.฀ 4 (45.709 45.725)mm
No.฀ 5 (45.459 45.475)mm
Valve฀mechanism Inspection฀&repair฀for฀timing฀chain/camshaft฀components
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