Overhaul of car engines Mazda 626 (6)

Technical data for overhaul of 4-cylinder engines
General information Cylinder diameter - 03.06 mm Stroke - 91.95 mm Displacement - 1991 cm 3 (2 liters) Compression: Nominal - 11.8 bar Minimum - 82 bar Maximum cylinder...

Technical data for overhaul of 6-cylinder engines
General information Cylinder diameter - 84.56 mm Stroke - 74.17 mm Displacement - 2494 cm 3 (2.5 liters) Compression at 250 rpm: Nominal - 14.0 bar Minimum - 9-9 rem...

General information about engine repair
This chapter contains information about repairing the cylinder head and internal engine components. Recommendations are given here, from preparation for repair and the...

Oil pressure check
1. Low oil pressure can be a signal that the engine needs to be repaired. Engine oil low pressure warning light (often called "light bulb for fools") does not serve the...

Cylinder compression check
1. Compression check will show you the condition of the cylinder-piston group and the gas distribution mechanism. Additional checks will show the location of the...

Diagnosis with a vacuum gauge
A vacuum gauge can provide valuable information about what happens in the engine. It can detect worn rings or cylinders, leaking cylinder head or intake manifold...

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

Engine Removal — Methods and Precautions
If you decide to remove the engine for an overhaul or major maintenance, perform the following preliminary steps. It is very important to choose a place to perform such...

Removal and installation of the engine
Note. Please read the entire paragraph before you begin. The manufacturer recommends that the entire powertrain assembly be removed from the top of the engine...

Engine repair — disassembly procedure
1. It is more convenient to disassemble and work with the engine if it is installed on a special stand. 2. If it is not possible to get such a stand, then you can...

Cylinder head — disassembly
Note. At the service station, remanufactured cylinder heads may be on sale. Consider that a special tool is needed to repair the head, the store may not have the...

Cylinder head — cleaning and inspection
1. For inspection and measurement of the cylinder head and valve mechanism, it is necessary to thoroughly clean and rinse all parts. Note. If the engine has been...

Valve maintenance
1. This job is best left to a professional, as special tools are required to machine the valves, valve seats, and guides. 2. Car owner can remove and disassemble the...

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

Pistons and connecting rods — removal
Note. Before removing the connecting rod and piston groups, remove the cylinder head, sump, oil intake pipe and oil damper, as described in chapter 2A or 2B . 1. On a...

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
Attention: If the process plug is completely sunk into the channel of the cooling jacket, then it will be extremely difficult or impossible to remove it from there. 1....

Cylinder Block — Inspection
1. Before inspecting the unit, it must be cleaned as indicated in paragraph 15 . 2. Inspect the block for cracks and corrosion. Check the threads in the threaded holes....

Cylinder honing
1. Before assembling the engine, it is necessary to honing 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 inspections, clean and wash the pistons and connecting rods and remove the old rings from the pistons. Note: Always replace the piston rings with any engine...

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

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, it is necessary to subject the old bearing shells to the most thorough...

Camshafts and tappets — inspection
Camshafts 1. To check the runout of the camshaft, two instrumental prisms and a dial gauge are required. Usually such a tool is in metalworking workshops. therefore, if...

Engine Repair — Assembly Procedure
1. Before assembling the engine, make sure that you have all spare parts, gaskets and cuffs to be replaced, as well as the following tools and materials. Standard hand...

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 are pre-checked ( see paragraph...

Installing the crankshaft and checking the clearances in the main bearings
1. The first important step in assembling the engine is to install the crankshaft. It is understood that at this point the block and crankshaft are cleaned, inspected...

Rear cuff installation
First you need to install the crankshaft, install and tighten the covers of the main bearings, then insert the cuff into its housing or into the block socket (details...

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

First start-up and running-in of the engine after repair
Attention! Keep a fire extinguisher handy when starting the engine for the first time. 1. After installing the engine on the vehicle, check the oil and coolant levels...

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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)