Austin Cambridge A55 Mark II 1489cc Engine Overhaul Manual | PDF Download

This Austin A55 Mark II PDF engine overhaul manual provides the exact instructions needed to overhaul and rebuild the 1489cc (1.5-litre) B-Series engine and hydraulic clutch system .

Written for owners and professional workshop technicians, the manual has instructions that are easy to follow helping you complete fixing or rebuilding the engine and clutch across the various B series engine types 15AA, 15MC, 15WB, and 15AMW with ease. 

You will find all essential data shown clearly, including bore and stroke dimensions, firing orders, valve timing data, standard and oversize piston sizes, bearing clearances, fluid capacities, and precise tightening torque settings.

When it comes time to pull the engine down, the text walks you step-by-step through removing the cylinder head and decarbonising combustion chambers.

It covers comprehensive valve servicing—from stem inspection, refacing, and seat-cutting to replacing worn valve guides and setting exact rocker clearances and tappet gaps.

The manual guides you through extracting pistons and connecting rods, checking gudgeon pins, measuring ring gaps, inspecting cylinder bores, and evaluating cylinder liner options.

You will also find instructions for replacing main and big-end bearing shells, measuring crankshaft journal tolerances, setting end-float with thrust washers, and servicing the flywheel.

The timing drive and camshaft sections cover removing and inspecting camshafts, working with middle camshaft bearing liners, servicing modified camshaft profiles, and managing the timing chain cover oil seal.

Clear instructions are provided for replacing the timing chain and dismantling tensioner to ensure correct timing wheel alignment. For internal lubrication, the manual outlines routine oil changes and filter replacements alongside advanced tasks like oil-pressure testing, fault diagnosis, and dismantling the oil pressure relief valve.

You will be shown how to overhaul the oil pump and clean the oil strainer pickup to protect your newly rebuilt engine.

Fuel and ignition systems are covered extensively. The manual provides a complete breakdown of the SU HS2 carburettor, detailing float chambers, jets, needles, suction pistons, and critical jet-centering procedures plus servicing the SU electric fuel pump.

Ignition instructions includes working with the Lucas distributor and coil, setting contact breaker points and condensers, routing high-tension leads, and performing static and dynamic timing adjustments.

Cooling system service instructions cover radiator removal, water pump overhauls, thermostat testing, and anti-freeze maintenance.

The clutch instructions show complete removal, inspection, pressure plate dismantling, release lever adjustments, and rebuilding both the clutch master and slave cylinders alongside hydraulic bleeding procedures.