Roller Lifter Stress Cracks

Hydraulic Roller Lifter

Camshaft Wear

Normal Camshaft Wear

Abnormal Camshaft Wear



Housing (Wankel)

Also known as:

•  

Description:
The housing of a Wankel Rotary engine is in an epitrochoid shape. The rotor rotates in an orbital movement inside of the housing. Multiple coolant passages surround the housing to help cool combustion areas.

The 4 stroke cycle in a Wankel Rotary engine

Good condition housing of a Wankel engine. Small amount of build up in coolant passages
Mazda Rx-7 12A Wankel engine

Rotor (Wankel)

Also known as:

• Rotary
• Wankel

Description:
A rotor in a Wankel rotary engine is the equivalent of a piston in a conventional internal combustion engine. It is in the shape of a Reuleaux triangle and designed to spin in side of a epitrochoid-shaped housing.  Each side of the rotor will go through the 4 stroke cycle. 

The 4 stroke cycle in a Wankel Rotary engine

Face of rotor. Apex seals, oil control seals, and 1/3 corner seals missing.
Mazda Rx-7 12A Wankel Engine

Face and combustion chamber of rotor
Mazda Rx-7 12A Wankel Engine

Side of rotor - Combustions chamber
Mazda Rx-7 12A Wankel Engine

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Brake Pads

Also known as:

•  Pads

Description:
Brake pads are a component of disk brakes used in automotive and other applications. Brake pads are steel backing plates with friction material bound to the surface that faces the disk brake rotor.

Normal wear on brake pad after 3000km of use. Brand unknown

Friction material completely worn away by contact with rotor. Only backing plate remains causing damage to rotor. Brand unknown.