WATCH: Jaguar V6 Engine Teardown Shows Overheating Can Be Fatal

When Jaguar-Land Rover downsized the 5.0-liter AJ V8 to a supercharged 3.0-liter V6 to save money, some argued the V6 was badly designed. In reality, the V6 retained 75% of the V8, including the engine block and our favorite engine pathologist is back to see if indeed the design was flawed by getting his hands dirty on a 2017 Jaguar F-Pace.

Eric is behind the several teardown projects we've covered, from a small 1.0-liter three-cylinder EcoBoost to a massive 5.9-liter Cummins diesel. And this V6 is hit latest patient, acquired with 62,000 miles on the odometer.

The engine in question is said to have overheating issues. According to Eric, that might result from lack of maintenance, considering the car was stolen and later recovered. No thief would spend cash on other people's cars, right?

Upon initial inspection, Eric found holes in the coolant pipes, which might be caused by excessive temperature. While the spark plugs looked relatively good, two ignition coils have melted, further backing his assumption that the engine overheated.

Eric next removed the supercharger assembly, where he saw more melted cooling pipes. He gained access to the valve covers with that out of the way. He then took these off and saw that the camshaft assemblies, except for the awful smell, didn't look too bad. The right-hand side of this V6 also seemed to be in good condition.

With the chains exposed, Eric removed the lower valve timing cover and said the internals were in good shape. Removing the camshaft assembly was the last part to complete the teardown on the cylinder head assembly.

Moving to the engine block, several burned marks were seen right off the bat. Again, this backed the initial assessment of the engine about overheating. After removing the oil pan, Eric took out the pistons, and even those looked "barbecued" from the burned marks.

Eric concluded the downsizing isn't necessarily bad in terms of design. Any engine would become faulty if owners - or, in this case, just anyone behind the wheel - would disregard something as simple as engine coolants. This, however, won't be a problem for future Jaguar owners as the brand is going all-electric by 2025, one of the first mainstream automakers to do so.