Darton Sleeves





Click here to visit Darton Sleeves website We are an official UK distributor

We not only supply Darton sleeves but can fully machine your block in our state-of-the art machine shop.

The machining process involves -

The block is loaded into our Haas CNC for initial machining

CNC engine block machiningSAMSUNG

Following the initial CNC machining, the block is placed in the large oven and heated to 85 degrees Celsius for 20 minutes.  After the heat soak the sleeves are fitted and pressure straps installed to help insure the sleeves will not sink after final machining.  the engine block is then placed back in the oven, reheated and then left to cool.

Evo X Darton 3 - CNC decking and boring

The block is then loaded back into the CNC for decking and boring.

Volvo Darton Sleeve Volvo 5 cylinder

After the final CNC machining the block is loaded into our Sunnen CK21 computer controlled honing machine with head gasket and torque plate installed (where applicable)  The honing process is multi stage and the surface finish tested with our Mitutoyo SF400 surface tester.


Evo X Darton 4  Evo X


Call us for to order Dart Sleeves and enquire about block machining facility.

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