Ford Endura-D engine

The Ford Endura-D engine is a diesel power unit used in a variety of vehicles made by the Ford Motor Company, including the Ford Focus, Ford Fiesta, Ford Mondeo and Ford Sierra.

It is a development of the 1.8 Diesel engine which has featured in the Ford range since the late 1980s, which itself was a development of the (then all-new) 1.6 Diesel unit, originally first featured in the Mk.3 Ford Escort.

Sometimes referred to as the TD DI Engine, it features a turbocharger and is often also equipped with an intercooler, and is available in Auto PS|75|0 and Auto PS|90|0 configurations.

The Endura-D engine features a cast iron block and cylinder head, but makes use of aluminium for many other components to minimise the weight penalty of the Diesel engine. It has a single overhead camshaft opening 8 valves via shim-and-bucket followers, and the camshaft is driven by a toothed belt which is driven from a sprocket on the diesel injection pump; unusually this pump is driven via gemini (twin) chains from the crankshaft.

It has a number of improvements over the previous generation of Ford diesel engines, including electronically-controlled direct injection (an improvement over the indirect method of the former model), and features 'drive by wire' accelerator - there is no throttle cable on this model. In addition, the traditional oil sump is replaced with a cast aluminium lower crankcase and a shallow oil pan; there is an oil-to-water cooler, and a great many detail improvements to parts throughout.

The engine has been a noted good performer and is a smoother, more powerful unit than the one it replaced.

However, there have been a larger-than-expected number of failures of bearings in this engine, with big-end and small-end connecting rod bearing failures not being uncommon (possibly due to the lack of pressure lubrication to the small ends), and rigid adherence to the servicing schedule is extremely important to ensure engine longevity, unlike the previous models' bulletproof reputation. A larger-than-expected group of owners have suffered small-end failures at around convert|90000|mi|km, and Ford has described this as being "a characteristic of the TD-DI engine".

Many of the mechanical components used in the TD DI engine were shared or improved in detail for use in the later TD CI Diesel engine, often referred to as the Duratorq.