Cleveland 351 Firing Order [With Diagram]

The Ford Motor Company produced a family of engines known as the Ford 335 during its history. The 351C, which debuted in 1969 for the 1970 model year and is more popularly known as the 351 Cleveland, has been given this name. It is important to emphasize the following points about the new 351 V-8 canted valve engines:

The newest advances in precise thin-wall casting processes were used to create a computer-designed, smaller, and broader cylinder block.
Valves have big bodies and compounded canting to maximize inlet and emission stream volume for enhanced ventilation, flow, and thermal efficiency.
Huge oval apertures on the intake manifold let the engine hot up fast and recycle more heat when required.
Using lighter pistons with a wide intake valve clearance cutout that improves airflow and allows for a larger charge of the fuel-air combination into the cylinders.
Nodular iron crankshafts with five main bearings allow for lighter, stronger crankshafts.

351 Cleveland firing order

1-3-7-2-6-5-4-8

Explanation of 351 Cleveland firing order

351 Cleveland’s firing order is 1-3-7-2-6-5-4-8. This means that this engine is a V8 engine with 8 cylinders. This is because there will be a huge decrease in the amount of vibration felt throughout the whole engine. You can see how critical it is to get the engine started in a certain order.

Using the correct spark plugs can ensure a smooth operation of the Ford 351C if the firing sequence is followed. You will know that the engine is firing in the right sequence when the spark plug wires are disconnected, which occurs, for example, when spark plugs are being replaced.

Before taking the wires out of the plugs, they must be marked to ensure the right firing sequence. 302 Windsor firing order is also the same as 351 Cleveland. How the spark plugs light up determines the firing sequence of the cylinders in a gasoline engine. It is the sequence in which the fuel is pumped into each cylinder of diesel engines, and its name relates to the sequence.

Ford Motor Company ensures that every engine it manufactures has a certain firing sequence. Accordingly for the 351C which is 1-3-7-2-6-5-4-8 which means that a cylinder with the digit 1 starts the cycle followed by cylinders 3 and 7. This cycle ends at cylinder 8. 351 Cleveland firing order diagram will give a perfect yet simple description of how this works.

This firing order applies to:

Ford 351
5.0L EFI
5.4L
5.8L V8

Torque Specifications

Fastener Type	Torque Spec
Main Cap Bolts	95-105 ft.-lbs.
Connecting Rod Bolts	40-45 ft.-lbs. (45-50 ft.-lbs. for Boss 351C)

Firing order for similar vehicles:

Porsche 928 1-3-7-2-6-5-4-8
Ford Modular V-8 1-3-7-2-6-5-4-8
5.0 H.O 1-3-7-2-6-5-4-8
L410 V8 1-3-7-2-6-5-4-8

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Why does the firing order of 351 Cleveland matter?

The firing sequence of an engine must be precisely timed so that the system is exposed to the least amount of vibrations feasible. The transmission of engine vibrations should be maintained to a minimum in cars to provide a comfortable ride for the driver and passengers and to prevent them from feeling the vibrations transmitted by the engine.

Specially designed camshafts may also help boost performance. A performance engine builder may use these camshafts to create a motor that runs more smoothly, distributes fuel more evenly, and lasts longer in terms of the crankshaft and main bearings.

Check Chevy 235 Firing Order

How Are 351 Cleveland Cylinders Numbered?

A depiction of Ford Motor Company may be seen on each of the cylinder’s four sides. You will be able to tell which of your cylinders are your two best, which are your two worst, which of your cylinders are your third worst, and which of your cylinders is your fourth best by looking at the genuine left-hand side of your engine.

What is the firing order for old 351 Cleveland engines?’

The firing order of 1-3-7-2-6-5-4-8 has proved fruitful as it provides the most efficiency from the engine. So this contributes to the decision not to change it throughout the years. This means the very popular 1970 351 Cleveland and 1973 Mustang 352 Cleveland firing order is also 1-3-7-2-6-5-4-8.

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FORD 351 CLEVELAND ICE IGNITION INSTALL AND TIPS

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Jake Mayock

Using his analytical & observational skills, coupled with his extensive automobile knowledge, he articulates difficult car topics for various publications. Besides working as a journalist, professor, and book editor for the last 15 years, he is also an author for Car magazine.