So Fix it

An engines firing order is the sequence that each cylinder is used in power delivery. The firing order for the 6.6L turbo diesel V8 in the 2004 Chevrolet Silverado 2500 2WD is 1-2-7-8-4-5-6-3.

Gasoline Versus Diesel

In a gasoline engine, the distributor or Engine Control Unit sends electricity to individual spark plugs to ignite fuel in each cylinder in a specific order. In a diesel engine it is determined by the order in which fuel is injected into each cylinder.

Cylinder 1

Engine firing orders always start with cylinder number one, which on this engine is located at the front left of the engine from the drivers point of view.

Cylinder Banks

GM V8 cylinders are numbered 1-3-5-7 on the left (drivers) side of the engine, and 2-4-6-8 on the right (passenger) side.

Leaking exhaust at the engine on the 6.0-Liter GMC engine means the exhaust manifold gasket is faulty and there no longer is a good seal between the exhaust manifold and the cylinder head. To fix this leak, it is necessary to remove the exhaust manifold and replace the gasket. The exhaust manifold is secured to the cylinder head with six bolts.

Instructions

Removal

1

Lift the vehicle hood. Ensure the exhaust leak is coming from the mating surface between the cylinder head and the exhaust manifold, not the EGR valve or where the manifold meets the down pipe. Mark each spark plug wire with the paint marker to identify which wire belongs on what spark plug.

2

Turn each spark plug boot about a half turn and pull it straight off the spark plug. Do not remove any plug wires from their respective coils.

3

Remove each exhaust manifold mounting bolt with the proper size socket and ratchet. Gently pull the manifold away from the cylinder head a bit and remove the faulty gasket from the cylinder head.

Installation

4

Hold the new exhaust gasket to the exhaust manifold. Press the manifold and gasket to the cylinder head. Hand-tighten each exhaust manifold bolt.

5

Tighten the exhaust manifold bolts to 10 foot-pounds of torque with the proper size socket and torque wrench. First torque the inside bolts, then the two outside bolts. Once all of the bolts are torqued to 10 foot-pounds, repeat the same process to 15 foot-pounds of torque with the socket and torque wrench.

6

Install each spark plug wire by pushing it onto the proper spark plug. Pay attention to the marks previously made so the firing order is not disturbed. Shut the vehicle hood. Check the exhaust manifold bolt torque after the engine is warmed and cooled twice to ensure they maintain 15 foot-pounds of torque.

A Dodge 2500 is a pickup truck with a carrying capacity of at least 3/4-ton. The 2005 model may have several different engines, most often an eight-cylinder 5.7-liter engine with sequential fuel injection. This requires a fuel pump to maintain the fuel under high pressure. The fuel pump in a 2005 Dodge 2500 is inside the fuel tank, requiring you to remove the fuel tank to replace the fuel pump.

Instructions

1

Disconnect the cable from the negative battery terminal with a socket wrench. This prevents the accidental discharge of fuel during the fuel pump replacement. Detach the electrical wiring harness and fuel lines from the fuel pump.

2

Siphon the fuel from the fuel tank into a container approved for gasoline. Place a floor jack under the vehicle and support the fuel tank with a floor jack. Disconnect the mounting bolts for the fuel tank with a socket wrench and release the retaining straps for the fuel tank. Lower the floor jack to remove the fuel tank from the vehicle.

3

Attach special tool 6856 to the lock nut on the fuel pump and connect a socket wrench to the special tool. Turn the lock nut for the fuel pump counterclockwise with the socket wrench and remove the lock nut from the fuel pump. Lift the fuel pump out of the fuel tank.

4

Install the new fuel pump into the fuel tank and attach its lock nut. Fasten the lock nut by turning it clockwise with a socket wrench and special tool 6856.

5

Raise the fuel tank in position with the floor jack. Attach the retaining straps to the fuel tank and connect the mounting bolts to the fuel tank with a socket wrench. Lower the floor jack.

6

Attach the fuel line and wiring harness to the fuel pump. Connect the negative battery cable with a socket wrench. Fill the fuel tank with fuel, start the engine and check for fuel leaks.

Repairing a 2001 Dodge Ram 2500 equipped with the 5.9 liter Cummins diesel motor may be simple or difficult, depending on the required repairs. The 5.9 liter, 24-valve Cummins diesel was available in model years 1998 through 2002 before being replaced with a common rail injection system. Many repairs may be completed by a do-it-yourself owner, while others should be performed by a professional mechanic. The first step in repairing your Dodge 2500 is to identify the problem and all affected parts.

Instructions

1

Diagnose the issue with the Ram by evaluating the pickups performance and referring to the manufacturers auto repair guide. Stalling, slow throttle response or lack of power may indicate an issue with the fuel systems or turbo charger. Trouble shifting could mean a transmission problem. The 2001 Dodge Ram 2500 is also equipped with a data port located underneath of the dash board on the drivers side. Plug a code reader, available at most auto parts stores or through a professional mechanic, into the port and read any codes that may indicate issues with one or more of the trucks operating systems.

2

Identify the components and parts that operate the affected systems and test their performance. Note any under-performing, or broken, parts for replacement. Check to make sure that routine vehicle maintenance, such as oil change and transmission service intervals, are also up to date.

3

Remove broken, or malfunctioning parts, and take them to a local auto parts store to match for replacement. Use only parts that are application-specific to the 2001 Dodge Ram 2500, or intended for universal use. Install new parts according to the manufacturers specifications and perform any neglected routine maintenance.

4

Test drive the vehicle under variable driving conditions and evaluate whether or not the issue has been solved by the replaced or repaired parts. If not, refer back to the manufacturers auto repair guide and re-evaluate the source of the Ram 2500s problem.