EXCHANGE CYLINDER HEADS

Every cylinder head is inspected for cracks, OIIC configurations have the crankshaft bores measured for size, ovality, taper and alignment and are either restored to specifications or scrapped. Valve guides are measured for wear and either resized or renewed to conform to original tolerances. Valve seats are machined so as to retain the correct seat angles, widths, valve heights and valve seating concentric with the centre line of the valve guide bore.

Valves are examined for damage, head thickness and stem wear and replaced or machined as necessary. All valve springs are tested for squareness, free height and compressed load length. Cylinder heads are checked for distortion and thickness. When matching the cylinder head face, particular attention is paid to maintaining the correct surface finish specified by the gasket manufacturer.