Cummins QSK 19 Engine Parts for Canada - Connecting Rod Section

Cummins QSK19 Engine Parts – Connecting Rod Section

The connecting rod assembly is one of the most stressed components in the Cummins QSK19 engine, transferring combustion force from the piston to the crankshaft across thousands of revolutions per minute under extreme load. At Diesel Pro Power, we offer premium-grade connecting rod components engineered to meet the demands of continuous-duty industrial and marine applications.

Whether you’re rebuilding a single rod or overhauling a full engine set, we carry the connecting rod bearings, bushings, and bolts designed to handle the QSK19's massive torque and high-cylinder pressures. Trusted by over 40,000 customers worldwide, Diesel Pro Power supplies components that meet or exceed OEM quality standards with fast shipping and global reach.

The Role of the Connecting Rod in the Cummins QSK19

In the Cummins QSK19, each connecting rod operates under extreme stress, linking the piston and crankshaft with precision movement. These rods must endure high compression loads during the power stroke and tensile forces during intake and exhaust strokes. Over time, the connecting rod’s bushings, bearings, and fasteners will wear down from constant friction and thermal expansion.

Replacing worn components is critical to avoid:

• Bearing failure due to metal-on-metal contact
  
  

• Crankshaft scoring or damage
  
  

• Excessive piston slap or imbalance
  
  

• Rod knock or engine vibration
  
  

• Catastrophic failure from bolt fatigue
  
  

Routine inspection and timely replacement of connecting rod hardware ensures engine longevity and performance integrity in the most demanding environments.

QSK19 Connecting Rod Bearings

Standard Size Connecting Rod Bearing Set

This bearing set includes upper and lower shell bearings used to support the crankshaft journal within the connecting rod. These precision-machined shells provide a critical lubricated surface to minimize wear and reduce friction.

Key Features:

• Designed for standard-size crankshaft journals
  
  

• Engineered for high-load diesel cycles
  
  

• Compatible with oil film pressure systems on QSK19 engines
  
  

• One set required per connecting rod
  
  

Bearings should be replaced any time rods are removed or during complete overhauls. Always verify journal measurements before reusing standard bearings.

Oversize 0.010” Connecting Rod Bearing Set

This bearing set is designed for QSK19 engines with a crankshaft journal that has been ground 0.010 inches under standard specifications. Used when the crankshaft has been reconditioned due to scoring or out-of-round measurements.

Applications:

• Reconditioned crankshafts
  
  

• Journal surface correction
  
  

• Engines previously experiencing low oil pressure
  
  

Provides an accurate oil clearance that restores proper hydrodynamic lubrication to prevent rod failure.

Oversize 0.020” Connecting Rod Bearing Set

Designed for crankshaft journals that have been ground 0.020 inches under original dimensions. This set offers the same protection and performance as standard and 0.010" bearings but accommodates further wear correction.

Why It Matters:

• Maintains correct bearing-to-journal clearance
  
  

• Preserves consistent oil flow across bearing surfaces
  
  

• Prevents excessive bearing wear or crankshaft scoring
  
  

Oversized bearings must always be matched to crankshaft machining specifications. Do not install without micrometer verification.

QSK19 Connecting Rod Bushing

Connecting Rod Bushing for QSK19 Engines

Each QSK19 connecting rod includes a bushing at the small end that supports the piston pin. Over time, these bushings wear due to oscillation and high-pressure loads. Our connecting rod bushings are built for exact clearance and material compatibility with hardened piston pins.

Bushing Specifications:

• Installed in the rod’s small end
  
  

• Supports full-floating piston pins
  
  

• Resists deformation under combustion stress
  
  

• Maintains lubrication film with minimal drag
  
  

It is strongly recommended to replace the bushing when installing new pistons or if wear is visually apparent. A press-fit tool and reaming may be required for proper installation.

QSK19 Connecting Rod Bolt

Heavy-Duty Connecting Rod Bolts

Rod bolts are among the most critical fasteners in the entire QSK19 engine. These bolts clamp the rod cap to the connecting rod body, creating a high-friction interface that supports combustion loads. Fatigue, stretch, or improper torque can result in catastrophic rod ejection and engine failure.

Bolt Features:

• Designed for high-strength clamping
  
  

• Two bolts required per connecting rod
  
  

• Compatible with OEM torque and angle specifications
  
  

• Resists loosening under vibration and temperature cycling
  
  

Installation Tip:
Always replace rod bolts when rebuilding the bottom end. Bolts are stretch-to-yield and should not be reused due to fatigue failure risk.

Best Practices for Servicing QSK19 Connecting Rods

When to Replace Bearings

• During engine overhauls or in-frame rebuilds
  
  

• If oil analysis reveals bearing metal content
  
  

• When excessive rod knock or low oil pressure is present
  
  

• Any time a connecting rod is removed for inspection or replacement
  
  

When to Replace Bushings

• During piston or rod replacement
  
  

• If there is visible scoring or discoloration
  
  

• When piston pin end play exceeds manufacturer tolerance
  
  

• To resolve wrist pin noise or movement irregularities
  
  

When to Replace Rod Bolts

• Always during bottom-end rebuilds
  
  

• If bolts show signs of elongation or galling
  
  

• After over-torque or if bolt threads are compromised
  
  

• If engine has experienced over-rev or hydraulic lock
  
  

Choosing the Right Bearing Size

Selecting the correct connecting rod bearing size requires accurate measurement of the crankshaft journal using a micrometer. Installing the wrong size bearing may result in:

• Insufficient oil clearance (leading to seizure)
  
  

• Excessive oil clearance (leading to knock or loss of pressure)
  
  

• Premature bearing failure
  
  

Clearance Guidelines (Typical Range):

• Standard: For unmodified crankshafts with no journal damage
  
  

• 0.010": For journals machined 0.010" undersize
  
  

• 0.020": For journals machined 0.020" undersize
  
  

When in doubt, consult your machine shop or service manual for specifications.

Why Diesel Pro Power for QSK19 Connecting Rod Parts?

• OEM-Compatible Components: Trusted quality for durability and longevity
  
  

• In-Stock Availability: Same-day shipping on most QSK19 rebuild parts
  
  

• Worldwide Service: Customers in over 180 countries
  
  

• Expert Assistance: Technical support available for rebuild guidance
  
  

• One-Stop Catalog: Everything from bearings to bolts in one place