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Volvo B 21 User Manual

Volvo B 21
64 pages
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Service
l\J~anual
Repairs
and
maintenance
Section 2 (21)
engine
817
,
819
821
,
823
2401975-1984
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Volvo B 21 Specifications

General IconGeneral
Engine TypeInline-4
Displacement2127 cc (2.1 L)
Bore x Stroke92 mm x 80 mm
Fuel SystemCarbureted or Fuel Injected (depending on version)
Torque160-180 Nm (118-133 lb-ft)
Fuel TypePetrol
Cooling SystemWater-cooled

Summary

Reconditioning Engine Manual

Repairs and Maintenance Overview

Introduces the scope of the manual, focusing on engine repairs and maintenance.

Important Information and General Specifications

Tightening Torques

Details specific torque values and procedures for engine assembly.

Cylinder Head Specifications

Provides specifications for cylinder head dimensions and machining.

Cylinder Block Bore and Piston Data

Lists bore dimensions, piston specifications, and clearances for cylinder blocks.

Piston Dimensions and Clearances

Specifies piston dimensions, weights, and running clearances.

Crankshaft and Bearing Journal Dimensions

Outlines crankshaft and bearing journal dimensions, tolerances, and connecting rod specifications.

Engine Component Tightening Torques

Specifies torque values for various engine components and assembly steps.

Special Tools for Engine Reconditioning

Engine Reconditioning Tool Descriptions

Lists and describes specialized tools required for engine overhaul procedures.

Thread Repair Procedures

General Thread Repair Guidelines

Details general procedures and tools for repairing damaged threads using inserts.

Spark Plug Thread Repair

Offers specific instructions for repairing spark plug threads in the cylinder head.

Thread Insert Installation Process

Guides the process of installing thread repair inserts using specialized tools.

Thread Insert Removal Procedure

Explains the procedure for removing previously installed thread repair inserts.

Engine Disassembly Procedures

Engine Reconditioning Process Overview

Provides an overview of the engine reconditioning process and required special tools.

Timing Gears and Cylinder Head Disassembly

Covers the initial steps for disassembling timing gears and cylinder head components.

Engine Component Removal Steps

Details the removal of pulleys, crankshaft bolt, oil seals, and oil pump components.

Flywheel, Oil Sump, and Oil Pump Disassembly

Explains the removal procedures for the flywheel, oil sump, and oil pump for manual and automatic gearboxes.

Engine Cleaning and Checking Procedures

Engine Assembly Procedures

Cylinder Head Disassembly

Cylinder Head Cleaning and Inspection

Cylinder Head Cleaning and Distortion Check

Explains how to measure cylinder head distortion using gauges and rulers.

Valve Seat Replacement Procedures

Outlines the procedure for replacing valve seats, including removal and preparation.

Cylinder Head Assembly

Valve Adjustment Procedures

Explains the procedure for adjusting valve clearance, including measuring and calculating shim thickness.

Engine Assembly and Final Checks

Engine Assembly Overview

Provides an overview of engine assembly, checking component positions and torqueing cylinder head screws.

Cylinder Head Screw Retorquing

Explains the procedure for retorquing cylinder head screws after engine warm-up.

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