Engine restoration options (Mazda Capella GC)

There are many options for engine rebuilding. The decision to replace the engine block, piston/connecting rod assemblies, and crankshaft depends on a number of factors, the most important of which is the condition of the block. Other factors include cost, access to machine shop facilities, availability of spare parts, and time.

Some of the recovery options are:

Individual parts - If inspection procedures indicate that the engine block and most components are in such a condition that they can be reused, purchasing individual spare parts may prove to be the most cost effective. The block, crankshaft and piston/connecting rod assemblies must be carefully inspected. Even if the block is slightly worn, the cylinder bores need to be honed.

Crankshaft kit - installation of a reground crankshaft and a matched set of pistons and connecting rods. The pistons are mounted on the connecting rods. The kit includes piston rings and necessary bearings. These kits are typically available in standard and a range of oversize cylinder bore sizes.

Short block the short block consists of the engine block with the crankshaft and piston/connecting rod assemblies already installed. All new bearings are installed, and all clearances will be correct. The camshaft, valve components, cylinder head and external parts may be bolted together.

Long block - The long block consists of the short block plus the oil pump, oil pan, cylinder head, valve cover, camshaft and valve components, sprockets and timing belt and timing belt cover. All components are installed with new bearings, seals and gaskets. Installation of manifolds and external parts is required.

Consider which option is best for you and discuss it with the workshop before purchasing replacement parts.