Introduction

INTRODUCTION

The instructions given in the following paragraphs refer to the complete overhauling of the engine on the bench, after having removed the power unit from the car. The instructions are subdivided as follows:

• Engine dis-assembly: removal of the engine accessories and components and dis- assembly into the main units forming part of it.
• Dis-assembly and overhauling of the cylinder head: complete overhauling of all the components of the head.
• Crankcase overhauling: complete overhauling of the crank mechanism.
• Instructions for re-assembly: these include the specific re-assembly operations which differ substantially from the dis-assembly in-structions.
• Checking and inspecting electric components of the lubrication circuit.

All the dis-assembly procedures described he-reafter are also valid for re-assembly reversing the sequence described, unless otherwise speci-fied.

The following procedures refer to the complete overhauling of the whole engine; it is however possible to use only certain parts of them separa-tely, when necessary for dealing with specific components.

ENGINE DIS-ASSEMBLY

PRELIMINARY OPERATIONS

1. Set the engine on a special overhauling stand using supports no. 1.820.145.000 (R.4.0178).

1.820.145.000 (R.4.0178)

REMOVING THE EXHAUST MANIFOLD

1. Slacken the fastening screw and remove the complete engine oil dipstick.
2. Slacken the fastening nuts and remove the exhaust manifold.

17 ÷ 21 Nm
1.7 ÷ 2.1 kgm

REMOVING THE ENGINE COOLANT FLUID MANIFOLD

1. Remove the coolant return manifold, after discor necting the pipe connecting to the thermostatic cu, and slackening the associated fastenings.
2. Remove the exhaust manifold seal.