How Does it Work?
- The intake manifold distributes air from a single entry point (the throttle body) to each cylinder
- As the intake valve for each respective cylinder opens, air is pulled in through the intake runner and the corresponding fuel injector sprays fuel along the path, creating an air-fuel mixture that is supplied to each cylinder
How Is It Made?
- Molded plastic or cast aluminum (modern)
- Cast iron (older models)
- Made to match precise specifications
Why Does It Fail?
- Cracking, warping or leaking
- Wear and tear
- Overheated engine
- Poorly tuned engine
- Improper or old coolant mixture
What are Symptoms of Failure?
- Internal or external leaks
- Erratic or high idle
- Poor performance
- Hesitation and bucking
- Check engine light may turn on
- Visible coolant or residue on the intake
What Are the Consequences of Failure?
- Reduced vehicle performance
- Additional damage to engine
- Decreases functionality of cooling system
- Overheating
- Damaged oxygen sensors and catalytic converters