Engine Problems

Question 1

Cause and effects of carbon deposits

Answer 1

C: Incomplete combustion of air-fuel mixture
E: Disruption of airflow

Question 2

Cause and effect of overheating

Answer 2

C: Insufficient lubricant, running engine at high speeds for long time
E: Glazed or glossy appearance on spark plug’s insulator

Question 3

Cause of effects of white deposits

Answer 3

C: Oil and coolant leaks and poor fuel quality
E: White frosting covering electrode

Question 4

Cause and effect of broken electrode insulation

Answer 4

C: Overheating, engine misfiring and idling
E: Visible cracking around the electrode

Question 5

Cause and effect of erosion

Answer 5

C: Contaminated oil or fuel with foreign objects
E: Increased gap between elctrodes in spark plug.
Altered shape and surface finish of engine