How Much Does a 5.9 Cummins Weigh?

If you’re working on a project involving a 5.9 Cummins engine, one of the first questions you might ask is, “How much does it weigh?” Knowing the weight is crucial for tasks like installation, transportation, and ensuring your equipment can handle the load. Let’s break down the weights of different 5.9 Cummins engine models and configurations.

Weight Differences Between 5.9 Cummins Models

The 5.9 Cummins comes in two primary variants: the 12 Valve (12V) and 24 Valve (24V). Their weights vary significantly due to design changes:

Model	Bare Engine Weight	Fully Assembled Weight
12 Valve​	12 Valve​ Around 850 pounds​	960 – 1100 pounds
24 Valve	N/A	1170 – 1200 pounds​

The 24 Valve engines are significantly heavier due to design differences. This extra weight is something you need to keep in mind, especially if you’re replacing an engine or planning to move it around.

Bare Block vs. Long Block

• Bare Block (Short Block): Includes only the basic engine structure (block, crankshaft, pistons). “Bare block” is sometimes confused with “short block.” A true bare block lacks even pistons or crankshafts, but Cummins short blocks are partially assembled.
• Long Block: Fully assembled with cylinder heads, turbocharger, oil pump, and accessories.

Block Type	Weight (12 Valve)​	Weight (24 Valve)​
Bare Block (Short Block)​	Around 850 pounds	Around 850 pounds​
Long Block​	Over 1100 pounds​	Close to 1200 pounds​

When ordering an engine, make sure you know whether you’re getting a bare block or a long block to avoid any surprises with the weight.

What Components Add the Most Weight to a 5.9 Cummins?

Several components contribute significantly to the overall weight of a 5.9 Cummins engine. The cylinder head, for example, is one of the heavier parts. It houses important components like the valves and combustion chambers. The turbocharger is another heavy piece, especially when it comes with its housing and connecting pipes. The flywheel, which stores rotational energy, also adds a good amount of weight.

Component	Weight Range (lbs)	Notes
Engine Block	400–450	Cast iron construction dominates here
Cylinder Heads	120–150	Aluminum heads are lighter but rare
Turbocharger	40–60	Varies by model
Flywheel & Clutch	50–70	Heavy-duty versions add extra heft
Fuel System	30–50	24V’s VP44 pump adds ~10 lbs over 12V
Accessories (Alt, PS)	60–80	AC compressors and brackets included

5.9 Cummins Weight in Practical Use

When it comes to using a 5.9 Cummins engine in the real world, weight matters a lot. For instance, if you’re using a crane to lift the engine, even though a fully assembled engine can weigh over 1000 pounds, a 2.5-ton (5000-pound) crane should have enough capacity. However, it’s always a good idea to double-check the actual weight of your engine to make sure the crane can handle it safely.

Another thing to consider is the weight limit of the engine mounts or brackets. If a bracket is rated to hold 750 pounds, you need to be careful because a 24 Valve 5.9 Cummins engine can weigh almost 1200 pounds. Always verify the weight-bearing capacity of your mounting equipment before installing the engine.

Conclusion

Anyway, the weight of a 5.9 Cummins engine can vary depending on its model, whether it’s a bare block or a long block, and the components it includes. Understanding these weight differences is essential for safe and proper handling, installation, and transportation. If you have any questions or need more information, please contact us!

Cummins QSB5.9 Engine