SOHC Engine Components
1 - Axis of the rocker arms of the exhaust valve drive; 2 - Direction forward along the right head; 3 - Direction forward along the left head; 4 - Axis of the rocker arms of the intake valve drive; 5 - Axis of the rocker arms of the intake valve drive; 6 - Cylinder head cover; 7 - Sealing gasket; 8 - Assembling the valve guides; 9 - Bolt; 10 - Hydraulic pusher; 11 - Valve drive rocker; 12 - M6 bolt with washer; 13 - Washer; 14 - Axis of the rocker arms of the exhaust valve drive; 15 - Saddle of the internal spring; 16 - Crackers of a split lock; 17 - Plate of valve springs; 18 - External valve spring; 19 - Internal valve spring; 20 - Oil deflector cap; 21 - Guide sleeve; 22 - Valve seat; 23 - Saddle of the outer spring; 24 - Exhaust valve; 25 - Bolt; 26 - Rear cylinder head cover; 27 - Sealing gasket of the rear cover; 28 - Thrust plate of the camshaft; 29 - Left cylinder head; 30 - Sealing gasket; 31 - Cylinder block; 32 - Left camshaft; 33 - Front camshaft oil seal; 34 - Right cylinder head; 35 - Cylinder head cover; 36 - Engine oil filler cap
DOHC Engine Components
1 - Engine oil filler cap; 2 - Cylinder head cover; 3 - The holder of camshafts; 4 - Camshaft; 5 - PCV valve; 6 - Cylinder head; 7 - Hose; 8 - Spark plug; 9 - Valve; 10 - Valve spring seat; 11 - Valve spring; 12 - Valve spring plate; 13 - Crackers of a split lock; 14 - Valve pusher; 15 - Adjusting washer; 16 - Washer; 17 - Sealing washer; 18 - Sealing gasket; 19 - Sealing washer; 20 - Washer; 21 - Sealing washer; 22 - Sealing gasket; 23 - Oil cap; 24 - Sealing gasket; 25 - Oil cap; 26 - Sealing gasket
1. The easiest way to disassemble the engine is to install it on a portable assembly stand. This kind of device can always be borrowed relatively inexpensively from a car service workshop. Before fixing the engine on the stand, it is necessary to remove the flywheel / drive disk from it.
2. If there is no opportunity to use the stand, disassembly should be done by placing the engine on a solid workbench, or by placing it securely on a hard garage floor. When working without a stand, make sure that the engine does not accidentally tip over.
3. If you plan to replace the engine with a remanufactured one, remove all attachments and external components from the old one and transfer them to the replacement block. The components to be changed include:
- a) Generator with brackets;
- b) Components of systems for reducing the toxicity of exhaust gases;
- c) Ignition distributor, spark plugs and spark plug wires - SOHC engines
- d) Thermostat with casing cover;
- e) Water pump;
- f) Injection system components (EFI);
- g) Inlet pipeline and exhaust manifolds;
- h) Oil filter
- i) Suspension support of the power unit;
- j) Flywheel/Drive Disc;
- k) Engine back plate - SOHC engines;
- l) The holder of a back epiploon of a cranked shaft.
Note. When removing external components from an old engine, try to remember the characteristic features of their installation. Record the seating positions of gaskets, seals, distance rings and bushings, pins, brackets, washers, bolts and other small parts in a notebook.
4. When choosing a scheme using an abbreviated block set consisting of a cylinder block with a crankshaft and connecting rod and piston groups installed in it, also remove the cylinder heads, oil pan and oil pump from the old unit (for possible alternatives to overhaul schemes see Section Alternative options for engine reconditioning schemes).
5. When carrying out a complete overhaul of an old unit, disassemble it and remove all internal components. The following is the best order to perform the engine disassembly procedure:
SOHC engines
- a) Cylinder head covers;
- b) Assemblies of rocker arms with axles;
- c) Valve lifters with guide assembly;
- d) Timing drive covers with bolts;
- e) Timing drive (timing belt with gears);
- f) cylinder heads;
- g) Camshafts;
- h) Oil pan with oil pickup;
- i) Oil pump;
- j) Connecting rod and piston assemblies;
- k) crankshaft and main bearings;
DOHC engines
- a) Cylinder head covers;
- b) Stamped section of the oil pan;
- c) Aluminum cast section of the oil pan;
- d) Front timing cover;
- e) Timing Drive Components (main and secondary chains with sprockets);
- f) Rear timing cover;
- g) Camshafts with valve lifters;
- h) cylinder heads;
- i) Oil pump with oil pickup;
- j) Connecting rod and piston assemblies;
- k) Crankshaft and main bearings.
6 Before disassembling the engine, prepare the following necessary materials and tools (see also Section Engine assembly procedure):
- a) Standard set of locksmith tools;
- b) A set of cardboard or plastic containers/plastic bags for organized storage of small components;
- c) Scraper for cleaning mating gasket surfaces;
- d) Countersink for removing stepped wear in the upper part of the cylinders;
- e) Puller for dismantling the vibration damper;
- f) Micrometer set;
- g) Telescopic caliper;
- h) Plunger Type Dial Meter (DTI);
- i) Valve spring compression tool;
- j) Hone for processing cylinder mirrors;
- k) Tool for cleaning grooves for installing piston rings;
- l) Electric drill;
- m) A set of taps and lerok;
- n) Wire brushes;
- o) Cylindrical brushes for cleaning oil galleries;
- p) Solvent.