Gasoline engine overhaul Mazda 626 (3 and 4)

Removal and installation the engine
Removal Remove the hood. Remove the battery, engine mounts and drain the coolant. Figure 3.27. Sequence of removal of components and assemblies when removing the engine...

Repair work possible without removing the engine from the car
Most basic repairs can be performed without removing the engine from the vehicle. Before starting any work, it is recommended to flush the engine compartment and engine...

General recommendations for engine overhaul
It is not always easy to come to a conclusion about the advisability of an engine overhaul, since it is based on a number of factors. High mileage does not always...

Alternatives to engine overhaul
When carrying out major repairs yourself, various options are possible. The decision to replace the cylinder block, connecting rod-piston group and crankshaft depends on...

Safety precautions when removing the engine
If a decision is made to remove the engine for major repairs or repairs of major components, preparatory measures must be carried out. It is extremely important to mark...

Disassembly sequence during engine overhaul
The easiest way to disassemble the engine and carry out all types of work is on a portable stand. Before installing the engine on the stand, it is necessary to remove...

Disassembling the cylinder head
To disassemble the cylinder head, it is necessary to remove the intake and exhaust manifolds and associated parts. Remove the camshaft and rocker arms from the head,...

Cleaning and checking the cylinder head
A thorough cleaning of the cylinder head and valve train components followed by inspection will allow you to assess the scope of service work required during a major...

Valve repair
Due to the complexity of the work and the need for specialized tools and equipment, repair of valves, seats, and guide bushings is best left to an experienced...

Cylinder head assembly
Before starting assembly, it is necessary to ensure that the cylinder head is clean, regardless of whether the repair was carried out in a workshop or in a garage. If...

Removal pistons and connecting rods
Before removing the pistons, the top of each cylinder must be reamed to remove the flange. Please refer to the manufacturer's instructions supplied with the tool. If...

Removal the crankshaft
Figure 3.34. Using a dial indicator to measure crankshaft axial play Before removing the crankshaft, check its axial play. Install the indicator so that its measuring...

Cleaning the cylinder block
Remove the soft plugs from the cylinder block. To do this, use a hammer and a mandrel to press them into the block, and then remove them from the holes by hooking them...

Checking the technical condition of the cylinder block
Clean the cylinder block thoroughly and double check that the ridges on the top edges of the cylinders are completely removed. Visually check the block for cracks and...

Checking the technical condition of the camshaft
After removing the camshaft from the engine, cleaning and drying it, check the shaft bearings for uniform wear, wear or seizure of metal. If there is damage to the...

Checking the technical condition of pistons and connecting rods
Before checking, the connecting rods and pistons should be cleaned and the piston rings should be removed from the piston. Caution! Old piston rings must always be...

Checking the technical condition of the crankshaft
Wash the crankshaft with solvent and dry thoroughly. Be sure to clean the oil passages with a stiff brush and flush with a strong stream of solvent. Remove any remaining...

Checking main and connecting rod bearings
Although main and connecting rod bearings must be replaced during a major engine overhaul, old bearings should be kept in their place of installation for careful...

Installing piston rings
Before installing new piston rings, you need to check the gap in the ring joints. It is assumed that the clearance between the ring and the groove pad has already been...

Installing the crankshaft and checking the main bearing clearances
Installing the crankshaft is the first operation when assembling the engine. The cylinder block and crankshaft must be completely cleaned, inspected, ground or bored to...

Installing pistons with connecting rods and checking connecting rod bearing clearances
Before installing the pistons and connecting rods, make sure that the cylinder walls are completely clean, the cylinder edges are chamfered, and the crankshaft is...

Installing the rear oil seal and rear cover
Apply a thin layer of engine oil to the outer surface of the oil seal and install the oil seal into the rear cover socket. Using a mandrel, press the seal evenly until...

Engine assembly sequence during major repairs
Before beginning assembly, prepare all necessary new parts, gaskets and seals, as well as the following tools and equipment: standard set of tools; torque wrench with a...

Starting the engine after repair and running it in
After completing engine assembly, double check the oil and coolant levels. With the spark plugs removed and the high-voltage wire of the ignition coil connected to...

Wear of the cylinder-piston group
The car engine is sometimes compared to the human heart. Indeed, it works continuously while the car is moving. True, this comparison is not entirely correct. After all,...

Engine bearings
What bearings are installed in your engine? Not all motorists can answer this question clearly. However, there are bearings there. And not just any, but very specific...

Timing belt for timing control
Today, timing belts have found a new lease of life. Almost all automakers equip their vehicles with flexible drives. German designers went even further. They widely use...

Engine valve repair
Any "tired" car can be revived. However, the technical difficulties involved are great. It is impossible to do without spare parts, machine tools, welding equipment and...

What you need to know when changing your oil
First, it is recommended to not only allow the old oil to drain completely, but also to turn the engine crankshaft 5-7 revolutions to remove the remaining oil from the...

What should an owner of a car with an injection engine know?
Injector engines are superior to carburetor engines in many respects, for example, their fuel efficiency and trouble-free starting in cold weather. However, in our...

Vehicles with a catalytic converter in the exhaust system
Hyundai vehicles are equipped with a catalytic converter as standard. If available, the use of unleaded gasoline is mandatory. Vehicles with a controlled catalytic...

Timing Belt Cover (since 1986)
Figure 14.2. Timing belt cover for models produced since May 1986: 1 – rubber seals (are installed on later models); 2 – front casing; 3 – rubber seal; 4 – water pump; 5...

Crankshaft main bearing shells (since 1987)
Models manufactured from April 1987 onwards are equipped with smooth crankshaft main bearing shells. Like earlier models, they had oil grooves. At the same time,...

Valve train (since 1986)
Engines of models since 1988 have been equipped with a 12-valve cylinder head. The design difference of the head is that there are three valves per cylinder (two inlets...

Toothed belt (since 1986)
Figure 15.9. Toothed belt: 1 – upper toothed belt cover; 2 – lower toothed belt cover; 3 – crankshaft pulley; 4 – oil deflector; 5 – leading pulley of the toothed belt;...

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More sections on repairs of other Mazda models
• Power unit: Engine repair (gasoline) Mazda3 BK (2003-2009)
• Power unit: Engine repair Mazda6 GG (2002-2008)

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Capella 5 (1991-1997)