How Much Does a 12 Valve Cummins Weigh?

If you are familiar with trucks, heavy machinery, and/or generators, you might have heard discussions surrounding the renowned 12-Valve Cummins. It is an enduring and dependable engine that has been used for several decades, powering various farm equipment and pickup trucks.

One question that comes to mind is: What is the actual weight of a 12-Valve Cummins engine? Is weight a critical factor to consider when purchasing or replacing one?

Let us analyze this further.

Which Engine Models Are 12 Valve Cummins Series?

You’ll hear folks mention the “12-Valve Cummins,” and they mean the Cummins 5.9L inline-six mechanical diesel, also known as the 6BT series.

The “12-Valve” label comes from the engine having two valves per cylinder, and with six cylinders, you end up with twelve. Most versions come with the tough P7100 mechanical injection pump, although a few early units use the VE pump.

These engines have a rep for being straightforward, dependable, and easy to fix. That’s why people still want them long after they rolled off the factory floor.

Here’s a quick look at the main 12-Valve Cummins models and where they’re used:

Application	Engine Model	Fuel Consumption (g/kWh)	Rated Power	Fuel System	Aspiration
Power	Cummins 6BT5.9-P160	≤230	160 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-P130	≤230	130 hp	Mechanical	Turbocharged
	Cummins 6BTAA5.9-P180	≤230	180 hp	Mechanical	Turbo+Aftercooler
	Cummins 6BTAA5.9-P160	≤230	160 hp	Mechanical	Turbo+Aftercooler
Construction	Cummins 6BT5.9-C145	≤230	145 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C135(2200)	≤230	135 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C135(2000)	≤230	135 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C135(1900)	≤230	135 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C130	≤230	130 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C125	≤230	125 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C120	≤230	120 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C115	≤230	115 hp	Mechanical	Turbocharged
	Cummins 6BTA5.9-C180(2200)	≤230	180 hp	Mechanical	Turbocharged
	Cummins 6BTA5.9-C180	≤230	180 hp	Mechanical	Turbocharged
	Cummins 6BTA5.9-C175	≤230	175 hp	Mechanical	Turbocharged
	Cummins 6BTA5.9-C170	≤230	170 hp	Mechanical	Turbocharged
	Cummins 6BTA5.9-C155	≤230	155 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C150(1800)	≤230	150 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C150(2500)	≤230	150 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C150(2400)	≤230	150 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C150(2300)	≤230	150 hp	Mechanical	Turbocharged
	Cummins 6BT5.9-C150(2200)	≤230	150 hp	Mechanical	Turbocharged
Genset	Cummins 6BTAA5.9-G12(140KW)	≤230	140 kW	Mechanical	Turbo+Aftercooler
	Cummins 6BTA5.9-G2(106KW)	≤230	106 kW	Mechanical	Turbocharged
	Cummins 6BTAA5.9-G2(120KW)	≤230	120 kW	Mechanical	Turbo+Aftercooler
	Cummins 6BT5.9-G2(86KW)	≤230	86 kW	Mechanical	Turbocharged
	Cummins 6BT5.9-G1(86KW)	≤230	86 kW	Mechanical	Turbocharged

Read more: What Does 12 Valve Cummins Engine Mean​

How Much Does a 12-Valve Cummins Weigh?

A stock 12-valve Cummins 5.9L engine usually weighs between 450 and 500 kg (990 to 1,100 lbs) when it’s dry.  

“Dry weight” just means the engine has no fluids in it—no coolant, no oil—and it usually skips the alternator and starter.  

Why the difference in numbers?  

• Engines with a turbo and intercooler tip the scales toward the upper end, landing near 500 kg.  
• Non-intercooled setups come in a little lighter, around 480 kg.

Here’s a quick weight chart for common models:

Series	Engine Model	Weight (Dry)
Power	Cummins 6BT5.9-P160	480 kg
	Cummins 6BT5.9-P130	480 kg
	Cummins 6BTAA5.9-P180	500 kg
	Cummins 6BTAA5.9-P160	500 kg
Construction	Cummins 6BT5.9-C145	480 kg
	Cummins 6BT5.9-C135(2200)	480 kg
	Cummins 6BT5.9-C135(2000)	480 kg
	Cummins 6BT5.9-C135(1900)	480 kg
	Cummins 6BT5.9-C130	480 kg
	Cummins 6BT5.9-C125	480 kg
	Cummins 6BT5.9-C120	480 kg
	Cummins 6BT5.9-C115	480 kg
	Cummins 6BTA5.9-C180(2200)	500 kg
	Cummins 6BTA5.9-C180	500 kg
	Cummins 6BTA5.9-C175	500 kg
	Cummins 6BTA5.9-C170	500 kg
	Cummins 6BTA5.9-C155	480 kg
	Cummins 6BT5.9-C150(1800)	480 kg
	Cummins 6BT5.9-C150(2500)	480 kg
	Cummins 6BT5.9-C150(2400)	480 kg
	Cummins 6BT5.9-C150(2300)	480 kg
	Cummins 6BT5.9-C150(2200)	480 kg
Genset	Cummins 6BTAA5.9-G12(140KW)	500 kg
	Cummins 6BTA5.9-G2(106KW)	480 kg
	Cummins 6BTAA5.9-G2(120KW)	500 kg
	Cummins 6BT5.9-G2(86KW)	480 kg
	Cummins 6BT5.9-G1(86KW)	480 kg

Read more: How Much Does a Standard 12 Valve Cummins Engine Weigh

How to Choose the Right 12-Valve Cummins (by Weight)

Weight isn’t always first on the list when you’re choosing an engine, but it plays a bigger role than you might think:

• Vehicle or Equipment Balance: An engine that’s too heavy up front can throw off how a truck handles or make a boat less stable on the water.
• Mounting and Frame Stress: Check that your frame and mounting points can take the extra pounds without needing extra bracing.
• Transport and Shipping: Shipping costs often go up with weight. A 500 kg unit costs a lot more to move than a 450 kg one, especially on international routes.
• Lifting and Installation: Heavier engines may require bigger cranes or more forklifts to install, which adds to shop time and costs.

Quick Tips:

• For light-duty truck engine swaps, aim for non-intercooled engines around 480 kg.
• For heavy-duty rigs or serious power builds, choose aftercooled or turbocharged models around 500 kg—they give you more bang for the weight.
• Buying from abroad? Always get the confirmed dry weight in the sales contract to flatten shipping surprises.