MDE 6 Q3

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Question 5: What is a potential consequence of not addressing high crankcase pressure promptly?

C) Risk of engine damage and potential failure

B) Enhanced fuel economy

D) Reduced engine noise

A) Improved engine efficiency

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Question 4: What tool should be used to check for excessive blow-by gases that might be contributing to high crankcase pressure?

D) Exhaust gas analyzer

A) Digital pressure gauge

C) Oil temperature sensor

B) Cylinder compression tester

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High Crankcase Pressure Implications and Actions

Question: If the daily engine log shows that the engine crankcase pressure gauge is indicating a much higher value than the normal reading, what are the implications and immediate actions that should be taken?

D) The increased pressure is usually due to low oil levels; top up the engine oil and restart the engine.

C) High crankcase pressure typically results from a faulty fuel pump; replace the fuel pump immediately.

B) High crankcase pressure may indicate potential issues such as excessive blow-by or ventilation problems; immediately shut down the engine and inspect the crankcase ventilation system and seals.

A) The engine may be operating normally; no immediate action is required. Continue to monitor.

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Question 2: If the crankcase pressure is high, what should be checked to ensure proper sealing and pressure control?

D) Radiator efficiency

C) Turbocharger operation

B) Engine gaskets and seals

A) Air filter condition

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Question 3: What additional investigation should be conducted if crankcase pressure remains high despite checking the ventilation system and seals?

C) Test the fuel injectors for proper operation

A) Inspect the oil pump for malfunctions

D) Check the alternator for faults

B) Examine the piston rings and cylinder walls for wear or damage

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Checks and Investigations for Increased Crankcase Pressure

Question 1: What is the first step an engineer should take when investigating increased crankcase pressure?

D) Verify the engine’s coolant level

A) Inspect the fuel system for leaks

B) Check the crankcase ventilation system for blockages or malfunctions

C) Replace the engine oil filter

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