Overhaul of car engines Mazda 626 (6)

Technical data for overhaul of 4-cylinder engines
General information Cylinder diameter: 03.06 mm Piston stroke: 91.95 mm Working volume - 1991 cm³ (2 liters) Compression: Nominal - 11.8 bar Minimum - 82 bar Maximum...

Technical data for overhaul of 6-cylinder engines
General information Cylinder diameter: 84.56 mm Piston stroke: 74.17 mm Displacement: 2494 cm³ (2.5 liters) Compression at 250 rpm: Nominal - 14.0 bar Minimum - 9-9 ber...

General information about engine repair
This chapter contains information on repairing the cylinder head and internal engine components. Here you will find recommendations ranging from preparation for repairs...

Checking oil pressure
1. Low oil pressure may be a sign that the engine needs repair. The low engine oil pressure warning light (often referred to as the "dumb light") does not serve the...

Checking the compression in the cylinders
1. A compression test will show you the condition of the cylinder-piston group and the valve timing mechanism. Additional checks will reveal the location of the fault -...

Diagnostics using a vacuum gauge
A vacuum gauge can provide valuable information about that. what happens in the engine. It can be used to detect worn rings or cylinders, leaking cylinder head or intake...

Engine restoration options
When performing a major engine overhaul, the car owner has to solve a number of problems. The decision to replace the cylinder block, connecting rod-piston group and...

Engine Removal — methods and precautions
If you decide to remove the engine for major or routine repairs, follow these preliminary steps. It is very important to choose a place to carry out such work. It must...

Removal and installation the engine
Note: Please read the entire paragraph before proceeding. The manufacturer recommends removing the entire powertrain assembly through the top of the engine compartment...

Engine repair — disassembly procedure
1. It is more convenient to disassemble and work with the engine if it is installed on a special stand. Before installing the engine on the stand, it is necessary to...

Cylinder head — disassembly
Note: Service stations may sell remanufactured cylinder heads. Considering that repairing a head requires specialized tools, the store may not have the necessary spare...

Cylinder head — cleaning and inspection
1. To inspect and measure the cylinder head and valve mechanism, it is necessary to thoroughly clean and wash all parts. Note: If the engine has been subjected to severe...

Valve maintenance
1. It is better to entrust this work to a professional, since processing valves, their seats and guides requires special tools. 2. The car owner can remove and...

Cylinder head assembly
1. Before installing the head, make sure that it is well cleaned, regardless of where the repair was carried out - in a garage or in a car repair shop. 2. If the head...

Pistons and connecting rods — removal
Note: Before removing the connecting rod and piston assemblies, remove the cylinder head, oil pan, oil pick-up pipe and oil separator as described in Chapter 2A or 2B ....

Crankshaft — removal
Note: The crankshaft can only be removed if the engine is removed from the vehicle. It is assumed that by the time the crankshaft is removed, the flywheel has already...

Cylinder block — cleaning
Caution: If the process plug is completely recessed into the cooling jacket channel, it will be extremely difficult or impossible to remove it from there. 1. There are...

Cylinder block — inspection
1. Before inspecting the unit, it should be cleaned as indicated in paragraph 15 . 2. Inspect the block for cracks and corrosion. Check the condition of the threads in...

Cylinder honing
1. Before starting engine assembly, it is necessary to hone the cylinders so that the new piston rings provide a good seal in the combustion chamber. Note: If you don't...

Pistons and connecting rods — inspection
1. Before inspection, clean and wash the pistons and connecting rods and remove the old rings from the pistons. Note: Always replace piston rings whenever the engine is...

Crankshaft — inspection
1. Wash the crankshaft with solvent and dry it (desirable) compressed air. Clean and flush the oil passage holes. 2. Inspect the main and connecting rod journals for...

Main and connecting rod bearings — inspection and selection of liners
Inspection 1. Even if you decide to replace the main and connecting rod bearing shells, you must subject the old shells to the most thorough inspection, since such an...

Camshafts and tappets — inspection
Camshafts 1. To check the camshaft runout, you need two instrument prisms and a dial indicator. Typically, such a tool is available in metalworking workshops. therefore,...

Engine repair — assembly procedure
1. Before you begin assembling the engine, make sure you have all spare parts, gaskets and seals to be replaced, as well as the following tools and materials. Standard...

Piston rings — installation
1. Before installing new rings, it is necessary to check the gaps in their locks. It is assumed that the gaps of the rings in the grooves have been pre-checked ( see...

Installing the crankshaft and checking the clearances in the main bearings
1. The first important step in engine assembly is installing the crankshaft. It is assumed that by this point the block and crankshaft have been cleaned, inspected and,...

Installing the rear cuff
First you need to install the crankshaft, install and tighten the main bearing caps, then insert the cuff into its housing or into the block socket (details see Chapter...

Installing the connecting rod and piston group and checking the clearances in the connecting rod bearings
1. Before installing the pistons and connecting rods, the engine cylinders must be thoroughly cleaned, the protrusion at the top of the cylinder must be removed, and the...

First start and engine running-in after repair
Caution: When starting the engine for the first time, keep a fire extinguisher handy just in case. 1. After installing the engine in the vehicle, check the oil and...

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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)