Tools To Service Your Cummins Marine & Industrial Engines

Whether you're tuning valves on a Cummins ISB, rebuilding a QSM11, or swapping an impeller on a QSK19, the right tools make the job easier, safer, and more precise to install cummins engine parts.  At Diesel Pro Power, we stock a specialized line of tools built for Cummins engine service across the B Series, C Series, L Series, M Series, 855 Series, K Series, and QSK Series.

These tools are selected based on real-world experience and are made to support marine and industrial environments. Our kits and individual tools work seamlessly with the most common Cummins diesel engines used in ships, workboats, auxiliary power systems, and generator sets.

Core Tools for Cummins Engine Maintenance

Each of these tools is applicable to multiple Cummins engine platforms and is essential for performing high-quality maintenance or overhaul procedures.

Feeler Gauge to Calibrate Valves

This tool ensures precise valve lash adjustment, crucial for performance, fuel efficiency, and emissions control. Ideal for both mechanical and electronically controlled engines, including ISB, QSB, ISC, QSC, ISL, ISM, and QSK19 series, as well as legacy NT855 and KTA models.

Piston Ring Assembly Tool

Make piston and liner installation smooth and damage-free. Our ring compressor is suited for in-frame rebuilds on large engines like the M11, QSM11, KTA50, and QSK19, as well as smaller marine engines such as the QSB 6.7.

Fuel Filter Wrench

Designed to grip standard and marine-style fuel filters, this wrench helps prevent housing damage and simplifies removal in tight spaces. A must-have for C Series, L Series, M Series, and B Series installations.

Oil Filter Wrench

Change oil filters quickly and safely using a non-slip, engine-safe tool. Perfect for routine maintenance on ISB, 6BTA, QSL, M11, ISM, and QSM11 engines, especially where high oil change frequency is required.

Impeller Puller

Removing stuck or swollen impellers from raw water pumps is easy with this tool. Designed for use on most Cummins marine cooling systems, particularly on engines with raw water circulation such as QSB, QSC, ISL, and QSK.

Engine Series Coverage

Below is a quick reference list of supported Cummins engine series and how our tool kits apply:

B Series (4B, 6B, ISB, QSB)

Common in auxiliary and light propulsion applications. Our tools support full valve work, filter service, piston installation, and cooling system repair.

C Series (6C, 6CT, 6CTA, ISC, QSC)

Known for rugged power, these mid-range engines often require deep service access. Our tools help with fuel, oil, valve, and impeller service.

L Series (ISL, QSL)

Used in medium- to heavy-duty marine and industrial applications. Tools here support modern valve settings, oil system maintenance, and impeller servicing.

M Series (M11, ISM, QSM11)

These powerful inline 6 engines demand high-quality tools for overhaul and cooling system service. Our ring compressors, filter wrenches, and feeler gauges are a perfect match.

855 Series (NT855, NTA855)

A legacy engine still widely used in marine applications. Our tools cover critical service points such as valve adjustment and piston work, as well as raw water pump maintenance.

K Series (KTA19, KTA38, KTA50)

High-displacement marine diesels requiring robust tool solutions. Our lineup includes oversized ring compressors and heavy-duty wrenches for filter and impeller work.

QSK Series (QSK19)

Advanced electronically controlled engines require high-precision tools for modern diagnostics and servicing. Our toolset ensures accurate valve settings, safe ring installation, and clean fluid servicing.

Why Choose Diesel Pro Power for Cummins Tools?

• Built specifically for Cummins marine and industrial platforms

• Backed by a full 1-year warranty

• Fast global shipping – most orders ship within 24 hours

• Expert support from diesel engine professionals

• Distributor-direct pricing for better value

Our goal is to equip you with the tools you need to service your Cummins engine like a professional, whether you’re a fleet manager, ship engineer, mechanic, or hands-on owner.

Frequently Asked Questions About Cummins Engine Tools

1. What is a feeler gauge used for on Cummins engines?

A feeler gauge is used to measure and set valve lash (clearance) between the rocker arm and valve stem. Proper valve adjustment improves fuel efficiency, ensures smooth combustion, and reduces engine wear. This tool is essential for maintaining engines like the ISB, QSB, ISC, and NT855.

2. How often should I calibrate valve lash on a Cummins engine?

Cummins generally recommends checking valve lash every 1,500–3,000 hours of operation, depending on the engine model and usage. A feeler gauge ensures that adjustments are accurate and in line with manufacturer specifications.

3. Why do I need a piston ring compressor for a rebuild?

The piston ring assembly tool compresses the rings so you can insert the piston into the cylinder liner without damaging the rings or scoring the walls. It’s critical during in-frame or out-of-frame rebuilds on engines like the M11, QSM11, KTA50, and QSK19.

4. Can I reuse piston rings without using a piston ring compressor?

Reusing piston rings without a compressor risks cracking the rings or causing poor sealing. A ring assembly tool ensures correct fitment and prolongs engine life, especially in high-performance marine engines.

5. What’s the difference between a fuel filter wrench and a standard wrench?

A fuel filter wrench is specifically designed to grip cylindrical fuel filters without slipping or crushing the housing. It’s ideal for removing tight or rusted filters in confined engine bays—especially on C Series, ISL, M11, and B Seriesengines.

6. When should I use an oil filter wrench on my Cummins engine?

Use an oil filter wrench when changing the engine oil—typically every 250–500 hours of operation depending on usage. It provides the torque needed to remove stuck filters, especially on engines like the QSM11, ISM, and 6BTA.

7. What happens if I overtighten or damage a fuel or oil filter during installation?

Overtightening can crush the filter housing or damage seals, leading to leaks and poor filtration. Using the correct filter wrench prevents these issues by offering even, controlled pressure during removal and installation.

8. Why do I need an impeller puller for raw water pumps?

Impellers can swell or seize inside the pump housing, making them difficult to remove by hand. An impeller puller safely extracts the impeller without tearing rubber vanes or damaging the pump—a must-have for QSB, QSC, and ISL marine engines.

9. How often should I change or inspect my raw water impeller?

Impellers should be inspected at least once a year or every 200–300 hours, depending on usage. Replacing a worn impeller with the help of a puller tool avoids overheating and water circulation failure.

10. Are these tools compatible with both marine and industrial Cummins engines?

Yes. All tools listed—feeler gauge, ring compressor, filter wrenches, and impeller puller—are suitable for use on both marine and industrial Cummins engines. They are built to handle the durability and access challenges found in both environments.

Order Tools with Confidence

Buying tools for Cummins engines doesn’t have to be complicated. At Diesel Pro Power, you’ll find:

• Tool listings grouped by engine model

• Real photos and clear specs

• Suggestions for related parts (like gaskets or service kits)

• Simple checkout with multiple payment options

• Expert phone support to guide your selection