Jaguar AJ-V6

The Jaguar AJ-V6 is a modern all alloy 24 valve V6 engine with two stage variable valve timing on the inlet cams.
It comes in 2.5ltr and 3.0ltr capacities and came in both transverse (Jaguar X-type) and longitudinal (Jaguar S-type) configurations. The Jaguars S-type application also benefitted from a three stage variable length inlet tract system.
The AJ-V6 is a development of the Ford Duratec V6 which itself is a development of a Mazda engine.
It employs a timing chain rather than a cam-belt and the block is constructed in such a way that the lower portion of the block is a separate structure and creates a girdle type arrangement incorporating the main bearing caps, greatly increasing rigidity.

There are a number of important differences between the transverse configuration and the longitudinal configuration as follows:

Water Pump

Unlike most conventional engines of the past, the water pump isn't incorporated into the block. It is a separate unit.
On the longitudinal (S-type) version the water pump is mounted on the front of the timing cover protruding forwards and driven by the back / outer face of the accessories belt.
On the transverse (X-type) version it is mounted at the flywheel end of the engine overhanging the bell housing and is belt driven via a large pulley from one of the camshafts.

S-type

X-type / Ford Mondeo

Starter Motor

The S-type version uses a conventional starter motor mounted alongside the engine block and acting directly onto the starter ring gear.
The X-type mounts the starter motor alongside the bell housing. It incorporates an intermediate gear rather than acting directly onto the starter ring gear.

Image Caption and Link

X-type / Ford Mondeo

Flywheel

The flywheel is slimmer on the X-type version, probably to keep the bellhousing as compact as possible.
Due to the difference in the starter motor configurations the X-type ring gear does not incorporate engagement chamfers on its teeth as it is in constant mesh with the x-type starters intermediate gear.

S-type

X-type / Ford Mondeo

Sump

The sumps are very different shapes between the two versions.
The S-type version has a very forward mounted sump bowl extending under the front pulley.
The X-type version has a more conventional central sump bowl.

S-type

X-type / Ford Mondeo

Adapting the Engine to Fit

The following is based on my experiences with my Jaguar S-type sourced engine and manual transmission and its adaption to fit to my 1971 Reliant Scimitar.

Engine Mount / Remote Oil Filter

If you are installing the engine in a rear wheel drive / longitudinal orientation then it makes sense to look at the S-types stock engine mounts. But the left hand mount on the S-type version is a large bulky item incorporating oilways and mountings for the standard oil cooler and oil filter mounting. It is pretty much guaranteed to foul on something. Here is how I got around it.

Accessories Mounting and Drive

Relocating the alternator and adapting the accessories drive belt path to suite.

The contents of this website are purely a reflection of my own experiences and knowledge gained whilst working on my various projects. Anything you do based on what you have read here is done so entirely at your own risk.
Personally I wouldn't trust someone like me with a lawn mower! You have been warned! Flapper-bat!

Jaguar AJ-V6

There are a number of important differences between the transverse configuration and the longitudinal configuration as follows:

Water Pump

S-type

X-type / Ford Mondeo

Starter Motor

The S-type version uses a conventional starter motor mounted alongside the engine block and acting directly onto the starter ring gear.
The X-type mounts the starter motor alongside the bell housing. It incorporates an intermediate gear rather than acting directly onto the starter ring gear.

Image Caption and Link

X-type / Ford Mondeo

Flywheel

S-type

X-type / Ford Mondeo

Sump

The sumps are very different shapes between the two versions.
The S-type version has a very forward mounted sump bowl extending under the front pulley.
The X-type version has a more conventional central sump bowl.

S-type

X-type / Ford Mondeo

Adapting the Engine to Fit

The following is based on my experiences with my Jaguar S-type sourced engine and manual transmission and its adaption to fit to my 1971 Reliant Scimitar.

Sump (Including Baffles)

Flywheel

Engine Mount / Remote Oil Filter

Cooling System

Accessories Mounting and Drive

Fuel System

Induction and Exhaust

Electrickery

Jaguar AJ-V6

There are a number of important differences between the transverse configuration and the longitudinal configuration as follows:

Water Pump

S-type

X-type / Ford Mondeo

Starter Motor

The S-type version uses a conventional starter motor mounted alongside the engine block and acting directly onto the starter ring gear.The X-type mounts the starter motor alongside the bell housing. It incorporates an intermediate gear rather than acting directly onto the starter ring gear.

Image Caption and Link

X-type / Ford Mondeo

Flywheel

S-type

X-type / Ford Mondeo

Sump

The sumps are very different shapes between the two versions.The S-type version has a very forward mounted sump bowl extending under the front pulley.The X-type version has a more conventional central sump bowl.

S-type

X-type / Ford Mondeo

Adapting the Engine to Fit

The following is based on my experiences with my Jaguar S-type sourced engine and manual transmission and its adaption to fit to my 1971 Reliant Scimitar.

Sump (Including Baffles)

Flywheel

Engine Mount / Remote Oil Filter

Cooling System

Accessories Mounting and Drive

Fuel System

Induction and Exhaust

Electrickery

The S-type version uses a conventional starter motor mounted alongside the engine block and acting directly onto the starter ring gear.
The X-type mounts the starter motor alongside the bell housing. It incorporates an intermediate gear rather than acting directly onto the starter ring gear.

The sumps are very different shapes between the two versions.
The S-type version has a very forward mounted sump bowl extending under the front pulley.
The X-type version has a more conventional central sump bowl.