Volvo B27A - B28 F1980

Group 21 Reconditioning engine
Specifications
Rocker arm mechanism
The rocker arm contact surface against the camshaft is surface-hardened and must not be ground.
Diameter, rocker arm shaft 19.959-19.980 mm (0.7857-0.7866 in)
Hole diameter, rocker arm 19.992-20.013 mm (0.7870-0.7879 in)
Clearance, shaft-rocker arm 0.012-0.054 mm (0.0005-0.0021 in)
TIMING GEARS
Camshaft
Three types of camshafts with different lift heights are in use.
The part number is marked on the front end.
Camshaft
Marking (part number), left
right.
Max. lift height, left mm
right mm
Check of camshaft setting (cold engine):
Adjust valve clearance on 1st and 6th intake valves to 0.7
mm (0,027 in), the intake valves should then open at,
1st BTDC
6th BTDC
Type 1
7910 245 522
(-143 or -144)
7910 245 412
5.144
(0.202 in)
5.059
(0.199 in)
9°±3°
7°±3°
Type 2
74 01 269138
74 01269 139
6.004
(0.236 in)
6.004
(0.236 in)
9°±3°
9°±3°
Type 3
74 01 269 615
74 01 269 616
5.96
(0.234 in)
5.96
(0.234 in)
8°±3°
8°±3°
Engine type
B27 A 1976-1979
B28 A 1980
1981-1982
B27E1975-1978
1979-1980 Sweden 4- Australia.
1979-1980 Other markets
X
X
B28E1981-1983.
B27F 1976-1979.
B28F1980
1981-1982.
Journal diameter, counting from front (all types): mm (in)
1st 40.440-40.465 (1.5921-1.5931)
2nd 41.040-41.065 (1.6157-1.6167)
3rd 41.640-41.665 (1.6393-1.6403)
4th 42.240-42.265 (1.6629-1.6639)
Radial play 0.035-0.085 (0.0013-0.0033)
End float, new 0.070-0.144 (0.0027-0.0056)
max 0.5 (0.0196)