Diagnosis should include
- smelling the exhaust
- observing the exhaust color
- listening for uneven exhaust pulses (misfiring) and restriction noises (hissing)
- examining areas where oil may be leaking or burning (by using dyes)
- changing the oil and observing oil consumption
- conducting a pressure check to determine coolant consumption
- repairing as needed.
Process/Skill Questions:
- What does blue smoke indicate?
- What does black smoke indicate?
- What does white smoke indicate?
- What causes a rotten egg smell?