1. Main bearings
   Minor bearings
2. Non-bearings

The crankshaft spins on the main bearings, which provides support.

1. Exhaust head bolts
   Experimental head bolts
2. Cylinder head bolts

Head bolts, aka cylinder head bolts, secure a cylinder head and gasket to the engine block.

1. Magnets
   Gravity
2. Piston pin clip

The piston pin clip is used to keep the piston in place. It is secured on both sides.

1. Bearing
   Balance shaft
2. Cog belt

The balance shaft is counter-weighted to offset unwanted crankshaft vibrations.

1. Sad Old Hairy Car
   Super Octane Hepta-Carbonie
2. Single Overhead Camshaft

The single overhead camshaft refers to an engine with one camshaft that operates both the exhaust and intake valves.

1. Push rod
   Bearings
2. Piston

The piston fits snugly within the cylinder. It is attached to the connecting rod and moves up and down within the cylinder during the combustion process.

1. Pressure lever
   Balancing arm
2. Rocker arm

The rocker arm is driven by a pushrod or camshaft lobe. This transfers motion to open and close the valves.

1. Valve cover
   Damper
2. Timing chain

The valve cover is bolted onto the cylinder head. It acts as a protective lid. The cover gasket, on the other hand, is placed between the valve cover and the cylinder head.

1. A pin
   A belt
2. A valve lifter

A tappet is a valve filter. It's a cylindrical piece, actuated by the camshaft.

1. Oil pot
   Oil pond
2. Oil pan

The oil pan serves as the oil reservoir. It's a removable part that is mounted on the bottom of the cylinder block.

1. Bearing
   Belt
2. Cylinder

A bearing is a curved metal piece that reduces friction between components. It comes in many shapes and sizes.

1. Crankcase
   Connecting rod
2. DOHC

The connecting rod forms the mechanical link between the piston and crankshaft. It converts the up-and-down motion of the pistons into the crankshaft's rotary motion​.

1. Sprocket
   The tappet
2. The grill

A sprocket is a wheel with a set of teeth on the outer circumference. It drives items like the timing chain/timing belt.

1. Dual Overhead Car
   Dual Overhead Camshaft
2. Dual Overhead Cylinder

A DOHC is a Dual (or Double) Overhead Camshaft. It's similar to the SOHC (Single Overhead Camshaft), but with an extra camshaft!

1. Rocker arm
   Push rod
2. Timing belt

The timing belt is a toothed belt. It's usually made of reinforced rubber and it rides on the sprockets.

1. Cog belt
   Harp pincher
2. Gallows monger

The cog belt is a toothed belt. A harp pincher and a gallows monger are ... well, whatever you want them to be.

1. A kind of squirt gun that fires oil
   An unscrupulous oil-change mechanic
2. A collar that aids piston-to-cylinder lubrication

An oil slinger is a cone-shaped collar that uses centrifugal force to distribute oil.

1. Exhaust valve
   Expansion plug
2. Gas tube

An exhaust valve is a camshaft-driven valve in the cylinder head. It releases exhaust gases after combustion.

1. Vibration killer
   Sound damper
2. Vibration damper

'Vibration damper' is another name for the harmonic balancer. Both these names sound like they should be used for musical instruments.

1. Cylinder liner
   DOHC
2. A valve liner

The cylinder liner is a replaceable, hollow tube that fits into the cylinder bore.

1. Engine block
   Head gasket
2. Crankcase

The engine block is the lower section of the engine. It is cast out of metal and houses the crankshaft, pistons and cylinders.

1. Outcast valve
   Rocker valve
2. Intake valve

The intake valve is camshaft driven and located in the cylinder head.

1. A part of the muffler
   A pulley in front of the crankshaft
2. The engine tuner for improved sound

The harmonic balancer is the pulley bolted to the crankshaft. It helps dampen crankshaft vibrations.

1. Timing chain
   Timing gears
2. Timing tubing

Timing tubing is not a part. Tubes cannot time. Time cannot be tubed. You get the picture!

1. A cam lifter
   A pulley lever
2. A port rocker

The cam follower, also known as a cam lifter, follows the cam lobe profile.

1. Oil pump
   Oil valve
2. Oil control ring

The oil control ring controls oil consumption within the cylinder. It falls under the umbrella of piston rings.

1. Intake valve
   Zero valve
2. Hydraulic valve lifter

The hydraulic valve lifter uses hydraulic oil pressure. It eliminates the need for valve adjustments.

1. Compression ring
   Sealant ring
2. Expansion ring

The compression ring is a piston ring that forms a seal with the cylinder wall.

1. A two-bolt main
   A four-bolt mini
2. A four-bolt main

The four-bolt main is the crankshaft main bearing cap used on high-performance vehicles. It's held in place by four bolts instead of two.

1. Freezer plug
   Refrigerator plug
2. Expansion plug

The expansion plug provides pressure relief for changing temperatures. This is necessary when coolant expands and freezes.

1. Sodium-cooled valve
   Nitrogen-infused timing belt
2. Salt piston pan

This type of valve contains sodium, along with a hollow space. When heated, the sodium melts and helps cool things down.

1. Gyrating pin
   Wrist pin
2. Dynamic pin

A piston pin, sometimes called a gudgeon pin in the UK, is a tubular metal shaft that attaches a piston to a connecting rod.

1. The circlip
   The pin bearing
2. The pin bushing or its outer surface

The piston pin bushing is removable. It serves as a bearing surface for the pin.

1. Cam follower
   Valve lifter
2. Bearing cap

The bearing cap is a retainer usually held in place by threaded studs and bolts, securing the bearing shell.