Millennium Technologies specializes in Nickel Silicone Carbide (NSC) plating of aluminum cylinders, but we still offer a wide variety of services for cast iron cylinders. The options depending on damage to bore are:
Overbore and hone to next piston size
Cheapest, most common repair. Most engines have multiple oversize pistons available through OEM and aftermarket vendors. Required piston size would be dependent on the severity of damage to the bore.
NSC Plate Cast Iron Bore
There are two reasons to plate a cast iron bore: improve the performance or save a cylinder past its service life. We can save that cast iron cylinder when over size pistons are no longer available or the cylinder is larger than the biggest over size piston. We typically can put back at least .020 and sometimes more. Contact us for our restoration services. For the performance minded, plating a cast iron bore will improve wear resistance and lower the coefficient of friction.
Purchase and install a new cast iron sleeve
We have vendors that can supply us sleeves for most common 2 and 4 stroke engines. We can machine out the existing sleeve and size cylinder for replacement sleeve. Then install the sleeve and hone to the finish size.
Option for most cast iron 4 stroke cylinders
Manufacture, install and plate aluminum sleeves
Typically done on older inline 4 cylinders, but really can be done on any 4 stroke. We remove the sleeve, manufacture a replacement aluminum sleeve, install and plate it for the benefits of decreased weight, increased cooling capacity, and increased cylinder bore service life.