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Home >> Volvo >> 1967 >> 142 Eng CD B18D >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> VOLVO Engines - (4 Cylinder) >> 1963-73 VOLVO B 18B, B 18D & B 20 (544, 122, 140 & P-1800 Series) 4 Cylinder >> Rocker Arm Assembly

Rocker Arm Assembly

Remove all related hoses, electrical leads, and mechanical linkage. Take off rocker arm cover and remove rocker arm shaft assembly and push rods. Check for excessive wear or undue damage on all parts, replace if necessary. Rocker arms can be rebushed if wear exceeds 0.004" (.10 mm) by pressing out old bushings using a suitable tool (SVO-1867 or equivalent). Ream new bushing to accurate fit on rocker arm shaft using a suitable reamer. Hole in bushing should be aligned with hole in rocker arm. Grind rocker arm tips (if necessary) to ensure correct angle to valve stems. Reassemble components in reverse order of disassembly.

Fig 1: Valve & Guide Assembly
G09326373Courtesy of VOLVO CARS CORPORATION
PISTONS, PINS, RINGS

Engine PISTONS PINS RINGS
Clearance In. (mm) Piston Fit Rod Fit Rings End Gap In. (mm) Side Clearance In. (mm)
1963-68             
B 18 B & D .0008-.0016 (.020-.041) (1) (2) Comp.    
        1 .010-.020 (.25-.51) .0021-.0032 (.053-.081)
        2 .010-.020 (.25-.51) .0021-.0032 (.053-.081)
        Oil .010-.020 (.25-.51) .0017-.0028 (.043-.071)
1969-72             
B 20 B & E .0008-.0016(3)(4) (.020-.041) (1) (2) All .016-.022 (.41-.56) .0017-.0028 (.043-.071)
1972-73             
B 20 F .0016-.0024 (.041-.061) (1) (2) All .016-.022 (.41-.56) .0016-.0028 (.041-.071)
(1) Handpush fit.
(2) Close running fit.
(3) 1971 B 20 B 0.0014 - 0.0020" (.036-.051mm).
(4) 1970-73 B 20 E 0.0016 - 0.0024" (.041-.061 mm).