Manifolds

Mufflers, Tailpipes, Exhaust Pipes, Catalytic Converters, 0 2 Sensors, Manifolds, Hangers & Gaskets

The primary function of the intake manifold is to evenly distribute the combustion mixture (or just air in a direct injection engine) to each intake port in the cylinder head(s). Even distribution is important to optimize the efficiency and performance of the engine. It may also serve as a mount for the carburetor, throttle body, fuel injectors and other components of the engine.

Due to the downward movement of the pistons and the restriction caused by the throttle valve, in a reciprocating spark ignition piston engine, a partial vacuum (lower than atmospheric pressure) exists in the intake manifold. This manifold vacuum can be substantial, and can be used as a source of automobile ancillary power to drive auxiliary systems: power assisted brakes, emission control devices, cruise control, ignition advance, windshield wipers, power windows, ventilation system valves, etc.

This vacuum can also be used to draw any piston blow-by gases from the engine's crankcase. This is known as a positive crankcase ventilation system. This way the gases are burned with the fuel/air mixture.

The intake manifold has historically been manufactured from aluminum or cast iron but use of composite plastic materials is gaining popularity (e.g. most Chrysler 4 cylinders, Ford Zetec 2.0, Duratec 2.0 and 2.3, and GM's Ecotec series).

Services

The following products, sold and installed on non-commercial vehicles by LENTZ USA, are accompanied by a limited warranty. Please contact the store manager for more details.

Should a warranted part fail to perform during the time of ownership, simply return to any LENTZ USA Service Center with your receipt for warranted repairs. See the back of your receipt for warranty details.

Typical Store Hours:
Monday: 7:30am - 7:00pm
Tues-Fri: 7:30am - 6:00pm
Saturday: 7:30am - 3:00pm
Closed Sunday

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