Engine Overhaul Alternatives

There are a number of options available for a major overhaul. The decision to replace the cylinder block, connecting rod and piston group and crankshaft depends on a number of factors, of which the condition of the cylinder block is the most important. Other criteria for the need for a major overhaul are the cost of repairs, the ability to access the equipment of car service workshops, the availability of spare parts, the time planned for the work, as well as personal experience.

Here are some of the overhaul options.

Purchase of individual spare parts

If the inspection shows that the cylinder block and most of the parts are in satisfactory condition and can be used in the future, then the most economically feasible purchase of individual spare parts. The cylinder block, connecting rod and piston group and crankshaft should be carefully examined. Even if slight wear of the cylinder block is detected, the cylinders are subject to obligatory honing.

Complete crankshaft

This overhaul kit includes a re-ground crankshaft and a set of matched pistons and connecting rods. The pistons are already installed on the connecting rods. The kit also includes a set of piston rings, main and connecting rod bearings. These kits usually contain pistons of both standard and all overhaul sizes.

Partial cylinder block

Contains a cylinder block with an installed crank mechanism and a piston group. The kit includes new liners of main and connecting rod bearings, all clearances comply with the norms. The existing camshaft, valve mechanism, cylinder head and mounted units are installed on the kit. Machining costs are minimal or not required at all.

Complete cylinder block

The complete cylinder block contains the entire partial cylinder block set plus the oil pump, oil pan, cylinder head, camshaft bearing housing cover, camshaft, valve train, camshaft timing belt pulley, timing belt, and belt covers. All parts are installed with new bearings, seals and gaskets. Only intake and exhaust manifolds and attachments are installed on the kit. Consider carefully which of the alternatives is best for you; before buying parts, consult a car service, with suppliers and sellers of spare parts.