So Fix it

The intake manifold for an delivers fuel and air to the engine in a precise ratio. International Harvester made an eight-cylinder 6.9-liter diesel engine from 1982 until 1987. This engine commonly appears in Ford F series trucks during this period, especially F-250 and F-350 models. The removal of the intake manifold in a Ford truck with a 6.9-liter engine requires you to remove the injection pump and other components to access the intake manifold.

Instructions

1

Remove the cables from the negative terminals of both batteries with a socket wrench. Disconnect the air cleaner from the intake manifold. Plug the air intake of the intake manifold with clean shop rags to keep debris out of the engine.

2

Detach the electrical connectors from the injection pump. Remove the bracket for the fast idle solenoid with a socket wrench, so you can access the mounting bolts for the injector pump. Disconnect the cables for the cruise control and accelerator from the throttle lever, if your vehicle is so equipped. Remove the bracket for the accelerator cable and push it out of the way.

3

Remove the fuel lines, in the elbow inlet and fitting adapter from the injection pump with a socket wrench. Rotate the injection pump out of the way, and disconnect the fuel lines from the injection nozzles. Cap all fuel lines and injection pump fittings with fuel system protective cap set T83T-9395-A to keep debris out of the fuel system.

4

Disconnect the retaining nuts from the the injection pump with tool T83T-9000-B. Detach the injection pump from its adapter, and remove the injection pump from the engine.

5

Disconnect the fuel return lines from the rear injection nozzles on the number seven and number eight cylinders. Detach the fuel return line on the fuel tank, and disconnect the electrical wiring harness from the engine. Remove the ground cables for the engine wiring harness from the left cylinder head.

6

Remove any additional components necessary to access the intake manifold on your vehicle. Disconnect the mounting bolts for the intake manifold with a socket wrench, and remove the intake manifold from the cylinder heads.

The Lumina was manufactured by Chevrolet and first introduced on the North American market in 1990. It featured three different body types. Chevrolet Luminas engines were equipped with multiport fuel injection system that required a special intake manifold. The intake manifold is designed to distribute the air fuel mixture in the engine. As the fluids pass constantly through the intake manifold, the gaskets get corroded and require to be replaced.

Instructions

Removal

1

Disconnect the batterys negative (ground) cable to prevent injury. Disconnect the vacuum hose connection from the throttle body air inlet duct. Disconnect the wiring harness connection from the Intake Air Temperature (IAT) sensor in the throttle body air inlet duct. Remove the throttle body air inlet duct. Drain the engine coolant from the cooling system.

2

Remove the accelerator control and cruise control cables with bracket from the throttle body. Remove the wiring harness from the retainer. Disconnect the throttle position (TP) sensor and idle air control (IAC) valve wiring harness connectors from the throttle body. Disconnect the front spark plug wires.

3

Disconnect the wiring harness attachment clips of camshaft position sensor (CMP). Remove the nut from the coolant pipe to the throttle body. Disconnect the thermostat bypass pipe coolant hoses from the throttle body. Remove the engine mount struts. Disconnect the right spark plug wire retaining clips. Remove the spark plug wires at the coil pack.

4

Remove the ignition coil bracket with the coils, the purge solenoid, the vacuum canister solenoid, the vacuum lines, and the electrical connections. Disconnect the vacuum hose at the manifold air pressure (MAP) sensor. Remove the Manifold Air Pressure (MAP) sensor and the bracket. Disconnect the emission control vacuum harness. Disconnect the vacuum booster hose, automatic transaxle vacuum modulator hose, heather and air conditioning vacuum source hose and fuel pressure hose from the intake manifold.

5

Remove the drive belt. Remove the front generator brace. Remove the rear generator brace. Remove the Exhaust Gas Recirculation (EGR) valve. Remove the right-hand intake manifold bolts and studs. Remove the left-hand upper intake manifold bolts. Remove the intake manifold. Remove the intake manifold gasket.

Installation

6

Install the throttle body. Lay the intake manifold gasket on the cylinder block. Position the intake manifold on the new gasket. Loosely tighten the left hand intake manifold bolts, the right hand intake manifold bolts and the studs. Then, tighten the intake manifold bolts and studs 18 foot-pounds of torque.

7

Install the Exhaust Gas Recirculation (EGR) valve. Install the rear generator brace and the front generator brace. Connect the vacuum hose connections to the intake manifold. Those connections include the vacuum booster hose, automatic transaxle vacuum modulator hose, heather and air conditioning vacuum source hose and the fuel regulator hose.

8

Plug in the emission control vacuum harness. Install the manifold air pressure (MAP) sensor and bracket. Connect the vacuum hose at the manifold air pressure (MAP) sensor and the intake manifold. Install the ignition coil bracket with the coils, the purge solenoid, the vacuum canister solenoid, and the spark plug wire retainers. Connect the plug wires to the ignition module. Connect the vacuum lines, and the electrical connections. Return the engine to the proper position.

9

Install the engine mount struts. Connect the thermostat bypass pipe and the coolant hoses to the throttle body. Connect the camshaft position (CMP) sensor wiring harness, spark plug wire harness and engine wiring harness. Install the throttle position (TP) sensor and idle air control (IAC) valve.

10

Install the accelerator control and cruise control cables with bracket to the throttle body. Connect the wiring harness to the retainer. Fill the cooling system with engine coolant. Install the throttle body air inlet duct. Connect the wiring harness connection to the intake air temperature (IAT) sensor in the throttle body air inlet duct and then connect the vacuum hose connection to the throttle body air inlet duct. Reconnect the negative battery cable.

The intake manifold is the part of your engine that distributes combustion substance and/or air consistently throughout the intake ports on your cylinder heads. Without the intake manifold, your engines performance would suffer, and you would lose engine efficiency. One company that makes intake manifolds is Motor Parts (Mopar), a subsidiary of the Chrysler Group LLC. It makes intake manifolds for Ram, Jeep, Chrysler and Dodge vehicles, but you can only purchase them from authorized dealers.

Mopar 426

The Mopar 426 Hemi Crate Engine gives you up to 486 foot-pounds of torque, and it comes with a dual quad intake manifold. The intake manifold in this engine is made of aluminum, making it fairly light. It is designed for race cars or for those who just want more road power. This manifold also has a dual plane M1, and you can convert this manifold so that its compatible with AVC carburetors. It is, however, already compatible with large port and Holley carburetors. The engine gives you up to 465 horsepower, and horsepower generally equals between 735.5 and 750 watts. The Mopar website indicates that this engine is an updated version of the 426 design, but the new design provides you with a more efficient and potent engine.

Six Pack

The Six Pack intake manifold is for 413, 440 and 426W engines. It is made of aluminum, and it features high torque and horsepower, allowing you to go from the idle position to approximately 6,000 revolutions per minute. It is a dual plane intake manifold and has rectangular ports. These ports allow you to use this intake manifold for both small and large applications. According to the Mopar website, you can use this intake manifold for both "street and strip applications."

Cross Ram

The Max Wedge Cross Ram Intake Manifold works with any type of RB engine that uses the Max Wedge cylinder heads, especially the Dodge Ram. This manifold is made of aluminum, and it is a single plane M1 type of manifold. The Max Wedge Cross Ram Intake Manifold increases the total airflow through the manifold by nearly 20 percent, according to the Mopar website. The makers of this manifold designed it to work with all types of Holley 850 cubic feet per minute carburetors that have a 2-1/8 inch exhaust header. According to the Mopar website, this intake manifold also increases your engines power, and the engine provides you with 505 horsepower.

Dating automotive components is an important part of any repair or modification. Minor changes in manufacturing standards over the years can make components from certain eras more or less desirable for specific uses. Fortunately, most major components in Ford engines are stamped with a four-digit date code. Dating a GT intake manifold is as easy as reading and deciphering that code.

Instructions

1

Locate the four-digit damp state on the intake. This is generally on the top of the manifold, to one side of the carburetor passages.

2

Compare the first digit to the date column of a Ford date code sheet. This letter will correspond to a production year.

3

Compare the second digit to the month field of a Ford date code sheet. This will correspond to a month. This digit varies by production year, so it is important to determine the year first.

Air intake systems vary in style, price and power produced. They range from stock systems equipped with air boxes and filters to cold air intake systems and warm air intakes. All have a filter of some sort.

Restriction

All air filters restrict air to a certain extent. The less restriction, the more powerful will be your motor. The air still must be filtered of dirt and debris. A high flow filter, such as a K & N, added to a stock system provides more air flow economically.

Temperature

Cold air generally is better for production of horsepower until the air gets too cold, like during northern winters. A true cold air intake is great for racing, and works well in moderate and even very hot climates. Theses systems are available for many vehicles from aftermarket manufacturers. An airbox allows big gulps of air when the throttle is opened all the way at speed. Therefore, any intake system should have an airbox appropriate to the size of the engine.

Price

The bottom line is that you must evaluate what your needs are and what you can afford to spend on an air intake system. The power and efficiency gains you will get depend greatly on other modifications you make to your vehicle. Research manufacturers claims and choose a system best for your vehicle.

A head gasket seals an engine as well as the pathways of oil and coolant within the engine. An intake manifold gasket seals the cylinder heads and the intake manifold together. Information on these parts can be beneficial as they can both experience leaks leading to other problems if left unchecked.

Manifold Gasket Leak

A leak in the intake manifold gasket can lead to coolant running down the sides of a vehicles engine. Some vehicles have become well known for springing leaks in their intake manifold gaskets. These vehicles, however, are usually equipped with plastic manifold gaskets which tend to fail sooner than other gaskets.

Head Gasket Leak

A head gasket can leak either coolant or compression. Coolant leaks in a head gasket will be discovered fairly quickly due to the fact that an engine will run hot as a result. Although compression leaks cause engines to lose a lot of their power, they will not prohibit you from continuing to drive the vehicle.

Considerations

Some motors are prone to coolant leaks in their intake manifold gaskets. There are also some vehicles which have motors prone to head gasket failure. Review consumer guides and other forums to determine if a particular vehicle is subject to head gasket failure more often than others.