What does the '.020' in the piston set name mean?

The '.020' indicates that these pistons are 0.020 inches larger in diameter than the original factory pistons. This size is used when the engine cylinders have been bored out (oversized) to clean up any imperfections and restore the proper cylinder wall finish for a new piston.

What is the Piston Cooling (PC) feature?

The Piston Cooling (PC) feature means these pistons have internal channels that direct oil spray onto the underside of the piston crown. This helps to dissipate heat more effectively, reducing the risk of piston scuffing and thermal expansion, especially under heavy load.

What else might I need for an engine rebuild with these pistons?

For a complete engine rebuild, you'll typically need a full gasket set, main and rod bearings, an oil pump, a water pump, and potentially freeze plugs. It's always best to consult your vehicle's service manual for a comprehensive parts list specific to your engine.

Mahle OE Cummins B 5.9L Piston Set .020 2243523020

Name: Mahle OE Cummins B 5.9L L6 .020 w/ PC Eng Set Piston Set (Set of 6)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-cummins-b-5-9l-l6-020-w-pc-eng-set-piston-set-set-of-6-t14-53564
Price: 581.91 USD
Availability: InStock

Mahle OE Cummins B 5.9L L6 .020 w/ PC Eng Set Piston Set (Set of 6)

$581.91

Only 1 left in stock

Mahle OE Cummins B 5.9L L6 .020 w/ PC Eng Set Piston Set (Set of 6)

Key Features

Fits Cummins B 5.9L L6 engines.
Set includes 6 pistons, rings, and pins for a complete engine rebuild.
Pistons are .020 inches undersize, intended for use with re-bored cylinders.
Features Piston Cooling (PC) design with internal oil passages for improved heat management.
Mahle OE pistons are built to meet original equipment specifications.
Not CARB approved; cannot ship to California.

This piston set is designed for Cummins B 5.9L L6 engines. Always confirm fitment with your specific vehicle's engine code and service manual.

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Product Details

If you're rebuilding the engine in your Cummins B 5.9L, a solid set of pistons is crucial for getting your truck back on the road with reliable power. This set of six pistons from Mahle OE is designed to meet the original specifications for your engine, ensuring a proper fit and function. They are specifically sized at .020 inches undersize, which is important if you're re-boring your cylinders to match. Mahle is a well-known name in engine components, and these pistons are built to handle the demands of a diesel engine.

These pistons feature a PC (Piston Cooling) design, which means they have internal oil passages to help keep them cool under heavy load. This advanced cooling helps prevent premature wear and potential damage, especially in applications where the engine is worked hard. The set includes all six pistons needed for a complete engine rebuild, along with the necessary rings and pins, making it a comprehensive solution for your project. Mahle OE parts are made to fit right, so you can be confident in their installation and performance.

When undertaking an engine rebuild, it's important to have all the right parts. This piston set is a key component for restoring your Cummins B 5.9L's performance. Remember that these pistons are not CARB approved and cannot be shipped to California. Always refer to your vehicle's service manual for specific installation procedures and torque specifications.