JAGUAR 2.0 INGENIUM
Engine Rebuild
Common Jaguar 2.0 Ingenium Engine Failures
The Jaguar 2.0 Ingenium engine is a common sight at Dieselheads and they are prone to a number of failures. This is most commonly the 204DTD and 204DTA in Jaguar vehicles. these variants are also fitted to Land Rover vehicles.
Turbocharger failure
The turbocharger itself on all diesel Ingenium engines is composed of components and materials that are seemingly not sufficient for its purpose. We commonly find vehicles with failed turbochargers, either as a result of engine failure or the direct cause of engine failure. The failure of this unit commonly causes an engine failure due to the intake of oil and possible debris. This unit is also rendered defective as a secondary result of engine failure.
Turbocharger consequence
As you can see in the images we find that a common consequence of a failed turbocharger is bent conrods. When excessive amounts of oil pass through the intake the engine hydro-locks, this means the piston in the squeeze portion of its cycle is forced to attempt to compress a fluid, in this case oil. So of course this is not possible and the forces are exerted on the weakest or most malleable component. This is obvious as the top of the piston protrudes above the deck at top dead centre. So if the conrod is bent it no longer has the length to protrude above the deck. The oil passthrough can also cause significant damage to the exhaust system catalytic converter/DPF.
Poor Maintenance
Engine failure can result if an engine is not properly taken care of. Neglecting regular oil changes and basic maintenance is a common cause for engine failure but is especially pertinent with the Ingenium engine. This is because it can block oil feed and galleries, so this means components lose the lubrication they require and can cause multiple following failures.
Maintenance consequence
Lack of correct and regular maintenance can cause a plethora of issues inside and outside of an engine. This is because the build up of particles, carbon and substances left by timing guides and sometimes cylinder liners remain in the engine when oil is not changed. Therefore leaving a thick oil slag that’s job is to correctly lubricate engine components. This can block oil galleries and oil pickup so renders the lubrication system useless and will often cause spun bearings. A very common following failure or direct cause is turbocharger failure.
Timing Failure
The Ingenium engine commonly suffers from timing failure. The components that make up the timing system are prone to failure because of the weak materials used. The timing chain itself commonly stretches or breaks and the plastic guides can break and drop. However we have also found plastic particles from the guides dropping and making their way from the guides over time to the oil pickup.
Timing consequence
As common with most timing failures we are seeing damaged or broken components such as rocker arms, tappets, valves, seals & springs etc. However these issues extend further with the Jaguar 2.0 Ingenium engine. The plastic particles worn from the guides over time are blocking the oil pickup. So this commonly causes spun bearings as well as turbocharger failure. Large pieces of broken off timing components are also a cause for various failures.
Fuel Injector Failure
We have found the fuel injectors fitted to the 2.0 Ingenium engines have a tendency to over-fuel. This simply means the injector itself is injecting too much fuel inside the cylinder, so produces an extreme amount of heat as the large amount of fuel is compressed and ignited. In addition to this we have discovered the piston itself is comprised of a weaker than expected material and so is very susceptible to damage.
Fuel Injector consequence
Over-fuelling fuel injectors we find in the 2.0 Ingenium engine cause the piston to melt and reduce because of the extremely high heat it is subjected to. So of course due it’s reduction in size and change of shape the piston is rendered useless as there is no compression or seal in the cylinder. In addition to this it is common for the cylinder liners to incur damage. A common audible recognition of this failure is a knocking engine. We have also found the weakly comprised pistons starting to crack and fallen glow plug debris in higher mileage engines.
Cylinder Liner Failure
Found only with the Jaguar 2.0 Ingenium engine and 204DTA variant (twin turbo) we discovered the material and manufacturing methods used when creating the iron based liners is insufficient. A common issue is where the liner itself is worn away and a lip is created because of the material scraped away in the piston revolution cycle. We have identified this as insufficient lubrication in the pass-through of oil through the oil ring. This mixed with fuel injectors over-fuelling through emission control methods creates an environment through which the rings scrape the less hard iron based liners during piston travel.
Cylinder Liner consequence
As the piston travels down it will bring with it particles of iron and contaminated oil which make their way down therefore blocking the oil pickup. The result is often spun bearings. Another consequence is loss of compression, as material is scraped away over time the bore increases in size creating a gap between the piston and cylinder wall. So this also means we have to manually grind away the lip to remove the piston. The liner not only fails based on it’s composition but also it’s fitment, we have discovered liners that have moved position and even dropped and so causing engine failure.
Jaguar 2.0 Ingenium Engine Rebuild
204DTD/A INGENIUM ENGINE
eVIDENCE OF DAMAGE
JAGUAR 2.0 INGENIUM ENGINE
204DT History
Engine History
In 2015 Jaguar Land Rover released their own branded range of modular engines to replace the previous Ford variants like the 2.2 TDi4. These platforms were produced to incorporate both petrol and diesel. The engines were designed for flexibility, the design allows for easier production of versions with fewer or more cylinders. This also meant they have the ability to be mounted longitudinally or transversely for 2 or 4 wheel drive applications.
The first diesel Ingenium engines used were fitted to the Jaguar XF, Jaguar XE and Jaguar F-Pace. This was at first a single turbocharged variant known as the 204DTD & 204DTH. In 2017 the platform was also fitted to the same vehicles plus the Jaguar E-Pace, this variant was twin turbocharged. Both these variants have their own iterations each developing different power outputs and can be found mounted differently to suit the application, these commonly adopt the 204DTA engine.
