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Cylinder - Crank Drive
Piston 1
Piston 2
Piston 3
Piston 4
Piston - history
Piston - in general
Piston - material
Piston - stress
Piston - dimensions
Piston - measuring
Piston - truck
Piston Pin
Piston Pin Offset
Piston Rings 1
Piston Rings 2
Piston Rings 3
Connecting Rod
Crankshaft 1
Crankshaft 2
Crankshaft 3
Crankshaft 4
Crankshaft 5
V-2 Crankshaft 6
Crankshaft 7
Bearing Play Check
Forces crank mechanism
Rot. Vibration Damper
Equaliser Shafts 1
Equaliser Shafts 2
5-cyl. Block
Fly Wheel
Cylinder Block 1
Cylinder Block 2
Cylinder Block 3
Cylinder Block 4
Cylinder Block 5
Cylinder Block 6
Loop Scavenging
Classic Racing Engine
V8 Cylinder Block
V8 Crankshaft 1
V8 Crankshaft 2
V10 Cylinder Block
V12 Cylinder Block
W12 Cylinder Block
W8 Cylinder Block

Gas Speed
Hollow Cylinder
Bore Stroke Ratio
Cubic Capacity
Output per Liter
Calc. Crank Mechan.
Pistin Force
Compression Ratio
Pistin Speed
Power (output)
Power (piston pressure)

Multi-cylinder engine 1
Multi-cylinder engine 2
Multi-cylinder engine 3
Multi-cylinder engine 4
Multi-cylinder engine 5
Multi-cylinder engine 6
Multi-cylinder engine 7
Multi-cylinder engine 8
Multi-cylinder engine 9
Multi-cylinder engine 10
Crankshaft Mechanism 1
Crankshaft Mechanism 2
Crankshaft Mechanism 3
Crankshaft Mechanism 4
Crankshaft Mechanism 5
Crankshaft Mechanism 6
Crankshaft Mechanism 7
Crankshaft Mechanism 8
Crankshaft Mechanism 9
Crankshaft Mechanism 10
Crankshaft Mechanism 11
Crankshaft Mechanism 12
Crankshaft Mechanism 13

  Cylinder Block

The crank mechanism causes pressure, warmth and vibrations

In liquid-cooled piston-stroke engines the cylinder block contains the entire crank mechanism. It has to resist combustion pressures, oscillations of the crankshaft and conduct the heat rapidly to the coolant.

Coating required combined with aluminium cylinders

Although cast iron with flake graphite (grey cast iron) results in more weight, it has however good sliding qualities with aluminium pistons. In order to save weight and increase the heat conductivity, cylinder blocks are more and more built from aluminium alloys. In this case, either the cylinder must be from high-quality cast iron (see first picture) or the aluminium surface of pistons or cylinders must be worked over (see second picture). This is done via extracting the soft aluminium from the silicon crystals (ALUSIL), by galvanic coating with nickel and silicon-carbide (NIKASIL), or by using a hollow body from silicon-ceramics when casting (LOKASIL).

Liners: easy repairable and better material combination

Since wet liners from centrifugal casting have direct contact with the coolant, they have to be sealed accordingly. If they start leaking, oil may flow into the crank housing. Dry liners, which do not have direct contact with the coolant, provide however more stability to the cylinder block. Liners manufactured from grey iron are in place either because of the better material combination with aluminum pistons or because of the possibility for easier repairing, for example for trucks.
Cylinder blocks that are fully 'surrounded' by an open coolant coat, are called 'Open Deck' (see first picture). If there are drillings or other openings for the cooling agent and remaining larger bars between block and cylinder, the designation is 'Closed Deck' (see second picture).

Workshop: screwed off or new liners

Under normal conditions the top of the cylinder bears most of the wear and the centre of the stroke the fewest. Dry liners are being screwed off and equipped with pistons in oversize. If it is not possible to use an oversize piston any more, it is common for truck engines, and less so for cars, to drill further and establish a dry liner. Wet liners are exchanged together with the pistons. Good sealing is important. In case of lacking engine power and/or heavy oil consumption, a compression check or better a pressure loss check is advisable before repairing.