See Details

30% Off Online Orders of Select Parts and Accessories. Enter Promo Code 30PEP in Cart

Close (X)

30% Off Online Orders of Select Parts and Accessories
Receive 30% Off Your Online Purchase. Use promotional code PEP30 at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 9/29/16. Online orders scheduled for in-store pick up must be completed by closing on 9/28/16 for discount to apply.

Intake Manifold

 

Intake Manifold

The intake manifold distributes air entering the engine, houses the fuel injectors or carburetor and delivers the air-fuel mixture to each cylinder. Some intake manifolds also contain coolant passages, providing a route for coolant to reach all parts of the engine.

What is an Intake Manifold and how does it work

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 specifi cations

Why Does it Fail?

  • Cracking, warping or leaking
  • Wear and tear
  • Overheated engine
  • Poorly tuned engine
  • Improper or old coolant mixture

What are the 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 Implications of Failure?

  • Reduced vehicle performance
  • Additional damage to engine
  • Decreases functionality of cooling system
  • Overheating
  • Damaged oxygen sensors and catalytic converters

How Difficult is the Install?

Difficulty Rating:

Note: Installation difficulty varies by vehicle.

Related Parts

Return to Parts Guides