How to use this Chapter This Part of Chapter 2 describes those repair procedures that can reasonably becarried out on the XU series engine (1580 cc "and larger), while it remains in the car. If the engine has been removed from the car and isbeing dismantled as described in Part C, anypreliminary dismantling procedures can beignored. Refer to Part A for information on theTU series engine (1124 cc and 1360 cc). Note that, while it may be possible physically to overhaul items such as thepiston/connecting rod assemblies while theengine is in the car, such tasks are not usuallycarried out as separate operations. Usually,several additional procedures (not to mention the cleaning of components and of oilways) have to be carried out. For this reason, allsuch tasks are classed as major overhaulprocedures, and are described in Part C of this Chapter. Part C describes the removal of the engine/transmission unit from the vehicle, andthe full overhaul procedures that can then becarried out.