190201b Flashcards
Engine block and cylinder liner fundamentals
Describe the cylinder block of an engine
- forms a rigid foundation for major engine components
- contains passageways for coolant and oil
- provides mounting surfaces for accessories
Part of the cylinder block that contains and supports the crankshaft is called:
Main bearing bores
A typical in-line cylinder block has its cylinders numbered, staring from the:
Front of the block
The banks of a “vee” type engine are normally identified as:
Left and right, from the rear of the engine
The term “enbloc” is used to describe a cylinder block that is:
A one piece casting
Alloy cast iron is used for engine block material due to its:
Strength
The outside diameter of a dry liner must fit the cylinder block correctly, why?
- to allow heat transfer from the liner to the block material
- to support the liner
What is a wet type cylinder liner?
They are in direct contact with coolant
Removable cylinder liners are used:
To allow easy replacement of worn cylinder bores
The purpose of a liner’s firewall is to:
Reduce the pressure and heat acting on the head gasket
A modular cylinder block design is used:
When engine size makes a one-piece block unmanageable
Leaking o-rings on a wet liner cause:
Coolant to enter the crankcase