New Jaguar 3.75 & 3.8 Litre Cylinder Blocks

Jaguar 3.75 3.8 Litre Cylinder Block

A selection of our new cylinder blocks to fit Jaguar 3.0 Litre,  3.75 Litre and  3.8 Liter ‘D’ type and ‘E’ Type variants  appear in the photograph here. Our latest tooling and pattern equipment is for the later 3.8 litre cylinder blocks which have more expansive water ways and additional internal ribbing, know as the ‘thick wall’ block by many racing enthusiasts, however, it should in reality be known as a ‘stiff wall block’ because the block does not have thicker walls as such, only an improved and stiffer structure around the core plug areas and along the apertures in between, offering an increased and more efficient coolant passage. These blocks also have the larger main bearing cap dowels on the exhaust side of the block and the block itself is numbered C22250.

The stiffer wall features an increased cooling capacity of the later 3.8 cylinder blocks is quite discrete and often overlooked, however these blocks for some while now have been in great demand by Historic Jaguar Racers and engine builders as they have proved to be a more reliable foundation for a Jaguar racing engine. This in mind, our early blocks such as those for the Jaguar D Type engine, both 3.75 litre and 3,8 litre, will now have this feature included as standard but will remain externally and visually the same to comply with historic motor racing regulations which are getting more and more strict as the years progress. We hope to have our next batch of castings fully machined and available in the next few months and will update this page accordingly.