Crankcase Ventilation System

Replacement Parts > Emission Control

Crankcase Ventilation System

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What is a Crankcase Ventilation System?

A Crankcase Ventilation System helps reduce air pollution from vehicle emissions. It works by providing a fresh air supply to the engine's crankcase, while removing the fumes that are created during the combustion process.

What are the signs of a faulty Crankcase Ventilation System?

Signs of a faulty Crankcase Ventilation System include a rough idle, hesitation when accelerating, poor fuel economy, and an increase in exhaust emissions.

Can a faulty Crankcase Ventilation System cause damage?

Yes, a faulty Crankcase Ventilation System can cause damage to the engine if it is not addressed. It can cause oil to leak, which can lead to engine failure.

How do you replace a Crankcase Ventilation System?

Replacing a Crankcase Ventilation System involves the following steps:

  1. Disconnect the negative battery cable
  2. Drain the crankcase oil
  3. Remove the air cleaner assembly and intake manifold
  4. Disconnect the crankcase ventilation hoses and remove the ventilation filter
  5. Install the new filter and hoses
  6. Reinstall the intake manifold and air cleaner assembly
  7. Reconnect the negative battery cable
  8. Refill the crankcase with oil