You should select a tool appropriate and convenient for the job. Most problems encountered are due to seized, rusty bolts or screws. In serious cases the bolt or nut must be drilled out or cut open to permit removal. It is therefore important to select tools carefully to minimise the chance of rounding (damaging) a nut/bolt. Where possible a ring spanner or socket is the best choice. ...

David Rawlinson teaches you how to inspect your coolant to check for a bad head gasket or leakage. ...

The purpose of this demonstration is to isolate the problem preventing an engine from starting. The video explains how we can tell the battery is ok (because it is able to power a motor that rotates the engine) suggesting the problem lies in ignition and/or fuelling mixture. ...

The oil should be a translucent brown fluid. Black gritty oil is worn out. Milky oil indicates coolant contamination (mixing). Oil should not be consumed (used up, lost) in petrol engines, nor should it leak (anywhere). Low oil levels can greatly increase engine wear.

David Rawlinson describes the contents of a basic tool set for car maintenance. ...