O-200-A Series Engine Oil System

Questions and Answers

What is the path of oil flow after it passes through the pressure oil screen?

Through the oil cooler bypass valve, then to the right oil gallery

Directly to the crankcase

Through the external full-flow oil filter, then to the left oil gallery (correct)

Back to the oil sump

What is the purpose of the suction screen in the sump pickup tube?

To prevent debris from entering the oil pump (correct)

To filter the oil

To regulate oil pressure

To cool the oil

Where does the oil flow after passing through the left oil gallery?

Across the crankcase, through the passages connected by the camshaft front journal groove (correct)

Back to the oil sump

Through the oil cooler

Directly to the main bearings

What component closes the rear end of the right oil gallery?

Oil pressure relief valve Signup and view all the answers

What is the purpose of the galleries in the oil system?

To pressure-feed the main bearings, cam shaft bearings, and hydraulic tappets Signup and view all the answers

What is the primary purpose of the oil cooler bypass valve?

To allow oil to bypass the oil cooler when it is not needed Signup and view all the answers

Which component is responsible for creating pressure in the oil system?

Oil pump Signup and view all the answers

What is the function of the passage connected by the camshaft front journal groove?

To flow oil from the left gallery to the right gallery Signup and view all the answers

What is the purpose of the flexible hose connections outside the crankcase?

To connect the oil cooler to the engine Signup and view all the answers

What is the function of the oil pressure relief valve?

To close the rear end of the right gallery Signup and view all the answers

Study Notes

Oil System Overview

The O-200-A series engines use a wet-sump, pressure-lubricating oil system.

Oil Flow Path

Oil in the sump passes through the sump pickup tube and suction screen to the oil pump's suction side.
From the oil pump's pressure side, oil is fed through the pressure oil screen or external full-flow oil filter into the left oil gallery.
If an oil cooler is installed, oil flows through the oil cooler bypass valve, then to the cooler via a flexible hose connection, and back to the engine via a second flexible hose connection.

Oil Distribution

Oil flows forward through the left gallery, across the crankcase, and into the right gallery through passages connected by the camshaft front journal groove.
The right gallery is closed by the oil pressure relief valve at its rear end.
The galleries pressure-feed the main bearings, camshaft bearings, and hydraulic tappets.

Oil System Overview

The O-200-A series engines use a wet-sump, pressure-lubricating oil system.

Oil Flow Path

Oil in the sump passes through the sump pickup tube and suction screen to the oil pump's suction side.
From the oil pump's pressure side, oil is fed through the pressure oil screen or external full-flow oil filter into the left oil gallery.
If an oil cooler is installed, oil flows through the oil cooler bypass valve, then to the cooler via a flexible hose connection, and back to the engine via a second flexible hose connection.

Oil Distribution

Oil flows forward through the left gallery, across the crankcase, and into the right gallery through passages connected by the camshaft front journal groove.
The right gallery is closed by the oil pressure relief valve at its rear end.
The galleries pressure-feed the main bearings, camshaft bearings, and hydraulic tappets.

Description

This quiz covers the wet-sump, pressure-lubricating oil system used in the O-200-A series engines, including the oil flow path and components. Test your knowledge of the oil system's components and operation.