Thrust clearance:
Using a thickness gauge (1), measure this clearance as shown
in figure, at the thrust plate. If the limit is exceeded, replace thrust
plate or camshaft.
Journal wear:
Measure the journal diameter in two directions at two places to
obtain four readings on each journal; and check the journal bores
with a bore gauge, producing four readings on each. From these
readings, compute the radial clearance (camshaft journal clear-
ance). If the service limit is exceeded by any of the computed ra-
dial clearances, replace the camshaft and, as necessary,
cylinder head, too.
“A” : Camshaft pulley side
“B” : Fuel pump side
Cylinder block
Distortion of gasketed surface:
By the same method that is prescribed for checking the distortion
of the gasketed surface of the cylinder head, check the top face
of the cylinder block for distortion and, if the distortion is found
to exceed the limit, machine the face with a surface grinder.
ENGINE MECHANICAL (F8B ENGINE)
6A-25
Item
Standard
Limit
Thrust clearance
0.050 – 0.150 mm
(0.002 – 0.006 in.)
0.300 mm
(0.012 in.)
Item
Standard
Limit
Journal clearance
0.050 – 0.091 mm
(0.0020 – 0.0036 in.)
0.15 mm
(0.0060 in.)
Camshaft journal dia.
Journal bore dia.
(a)
43.425 – 43.450 mm
(1.710 – 1.711 in.)
43.500 – 43.516 mm
(1.712 – 1.713 in.)
(b)
43.625 – 43.650 mm
(1.718 – 1.719 in.)
43.700 – 43.716 mm
(1.720 – 1.721 in.)
(c)
43.825 – 43.850 mm
(1.725 – 1.726 in.)
43.900 – 43.916 mm
(1.728 – 1.729 in.)
(d)
44.025 – 44.050 mm
(1.733 – 1.734 in.)
44.100 – 44.116 mm
(1.736 – 1.737 in.)
Distortion of
Standard
Limit
Distortion of
gasketed surface
0.03 mm
(0.0012 in.)
0.05 mm
(0.0020 in.)
