Lower Block

OCS has vast experience in re-boring, repairing and reconditioning the lower block for engines of all types. Our lower block services include re-lining the cylinder block back to standard or to a customer’s specification. We can re-bore V8s on a rollover jig off the main housing diameters to ensure extremely high levels of accuracy and to guarantee all machining is concentric to the mains.

We are also able to re-face and line hone the block to return it to true in order to remove any distortion in the cylinder block itself.

Our lower block services include:

• Pressure testing
  Pressurising the coolant system identifies leaks and cracks that require repair.
• Block refacing
  Re-facing cylinder block back to true in the event of damage or distortion.
• Line honing
  Machining the main cap in order to close the hole then re-machine to manufacturer’s specification removing any distortions or damage back to true.

• Line boring
  Line boring is a machining process that establishes perfectly straight bores for crankshaft and camshaft housings, our equipment ensures the block housing is remanufactured to true. 

• Con rod honing
  We machine both connecting faces of the con rod then rehone the bore to ensure it is remanufactured to true.

• Camshaft bearing fitting
  We remove and refit worn or damaged bearings. We also offer manufacturing of bespoke bearings. We can also line bore the bearings to customer specifications.
• Small end bush remanufacturing and replacement
  We can remove small end bushes and rebore to ensure all con rods are the correct length.
• Custom main caps
  We are able to reproduce bespoke main caps to suit any engine or customer specification.
• White metalling
  We offer reproducing and machining of white metal bearings to suit customer specifications.
• Diamond cylinder honing
  We use diamond honing to ensure cylinder rebore finishes are within 2 microns.

• Reliner Motorcycle barrels
  We are able to rebore and fit liners to damaged or worn motorcycle barrels.