Is The Ford 4.0 SOHC A Good Engine? Let’s Find Out!

In 1997, Ford first offered the 4.0-liter single overhead camshaft (SOHC) engine. And the reliability of the Ford 4.0 SOHC is strangely related to its timeline.

Now the question comes- is the ford 4.0 SOHC a good engine? If you purchased your Ford after 2004 and it has a 4.0 SOHC engine built-in, it is undoubtedly reliable. But if you bought it before 2004, there’s a 75% chance that it has some big problems.

When Ford launched this engine to the market, it had timing chain issues. A few years later, they had to fix these faults with their 4.0 SOHC as it faced loads of criticism. And we are here to inform you how the engine eventually became reliable.

Ford 4.0 SOHC Engine Specs

Coming from the family of Ford Cologne, Ford primarily offered the 4.0 SOHC engine in Ranger and Explorer. From 2005, Mustang came with this engine as well. 

Firing Order1-4-2-5-3-6
Compression Ratio9:1 to 9.7:1
Engine Oil Capacity4.7 liters/4.96 quarts
Max power RPM5300
Max torque RPM3500

Is The Ford 4.0 SOHC A Good Engine?

With additional power and torque, the 4.0 SOHC is a success for Ford because it has proven to last long. As said before, this success did not come before 2004 since its timing chain cassettes often disintegrated into the engine.

A pre-2004 SOHC 4.0 has a reliability rating of 0.25 on a scale of 1, meaning it is only 25% reliable. When Ford’s SOHCs of this period start cold, a metal rattle is one of the common malfunctions. This often results in an expensive procedure, based on what repairs the components need.

According to many reputed automobile magazines, the post-2004 Ford 4.0 SOHC is pretty reliable. It received top marks regularly for its capacity to perform under routined maintenance.

Although it suffers from poor fuel economy and performance compared to modern V6s, it remains one of the relatively reliable and simple engines. If your truck is used for towing, heavily driven, or performed under stressful conditions, the Ford 4.0 SOHC takes care of it like a monster. 

The crankpins in a FORD 4.0 SOHC are placed to produce a powerful impulse at every 120°crankshaft rotation. It helps to ensure a smooth driving experience.

Moreover, the problems in a 4.0 Ford SOHC are quite easy to fix. It makes the engine further reliable. Some of its common issues are overheating, chirping noise due to dry camshaft,  sticky IAC valves, and intake vacuum leaks. 

These issues of the Ford 4.0 SOHC can be tackled with a simple DIY approach, whereas other engines might require a rigorous service. Considering this line of engines is two decades old, it can serve pretty well. 


Since the Ford 4.0 SOHC is rather an old engine, information regarding it can be obscure. Here are some expert answers to some of your FAQs:

How Many Miles Will A Ford 4.0 SOHC Last?

In some cases, Explorer and Mustang stayed intact for more than 200,000 miles with a 4.0 SOHC engine. Ford Ranger, however, usually serves mileage as high as nearly 300,000.

How Much Horsepower Does A 4.0 SOHC Have?

When the 4.0 SOHC is inside of an Explorer, it produces 210 horsepower. The 2005 to 2010 Mustang has 210 HP while Ranger has 207 HP.

Is The Ford 4.0 SOHC An Interference Engine?

Contrary to popular beliefs, the 4.0L SOHC is not an interference engine. This, fortunately, will not bend the valves when a timing chain failure occurs.

How Many Cylinders Is A 4.0 SOHC Ford Motor?

The Ford 4.0 SOHC engine comes with a V-6 specification. It means that the engine has six cylinders. They often need extra maintenance because of the weak casting on stock cylinder heads.

What Size Engine Is A Ford 4.0 SOHC Liter?

The width of the cylinders is 3.95 inches, and the distance from the piston travels inside the cylinder is 3.32 inches. Altogether, it creates an engine displacement of 245 cubic inches.


Ford automobiles with a 4.0 SOHC engine are old-school and easy to handle. While there is much room for improvement, its components are prevalent and inexpensive.

And it is essential to bear in mind that these engines are from two decades ago. So the Modern V6s will serve you far better. However, if you’re on a budget, you can buy a used late-2000s, Ford, with a 4.0 SOHC engine.

But make sure of two factors. The seller must not have heavily driven the car in the past, and you can ensure its routine maintenance. Only then would the experts suggest you buy it. With proper care, it may outlast many modern vehicles.

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