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.

The front wheels on a 2005 F250 Super Duty truck are designed to withstand heavy duty work. Because the F250 is a heavy duty truck, the wheels have eight lug nuts, instead of the usual five or six lug nuts found on light duty trucks. The lug nuts are a special swivel-type nut, designed to stay tight in situations where normal fixed nuts can loosen. Its also important that you never apply any lubricant such as engine oil to the wheel studs or lug nuts, because this could also cause them loosen under certain circumstances.

Instructions

Removal

1

Park the F250 on a flat, level surface and turn off the engine. Shift the transmission into park, or first gear for F250s equipped with a manual transmission.

2

Press the parking brake pedal down to engage the parking brake. Place one wheel chock behind each of the rear wheels. Pry the hub cap loose, if equipped, with a large flat-head screwdriver.

3

Break each of the eight lug nuts loose with a lug nut wrench. This is important, because if you try to loosen the nuts when the vehicle is lifted, the wheel will spin and you wont get any leverage.

4

Lift the front of the truck with a jack and place a jack stand under each side of the front frame. Lower the truck onto the jack stands and make sure theyre secure.

5

Remove the lug nuts with the lug nut wrench and pull the tire off of the truck.

Installation

6

Set the wheel onto the studs and reinstall the lug nuts. Snug them tight with the lug nut wrench while holding the wheel to make sure it doesnt turn.

7

Lift the truck with the jack, then remove the jack stands and lower it back to the ground.

8

Tighten the lug nuts to 165 foot-pounds with a torque wrench an metric socket in an alternating, criss-cross pattern.

9

Place the hub cap onto the wheel and tap it down into position with a rubber mallet.