Oil Pump

An oil pump is a vital component in an internal combustion engine's lubrication system, responsible for circulating engine oil to ensure proper lubrication of moving parts.

OE Number

15010-5X00A	150105X00C
15010-EB301	15010EB30A
15010-EB30A	15010EB70A
15010-EB70A	15010-5X00C
150105X00A

Compatible Applications

Chevrolet Avalanche 5.3L 2007-2013

Chevrolet Avalanche 1500 5.3L 2002-2006

Chevrolet Camaro 5.7L 6.2L 1999-2015

Chevrolet Corvette 5.7L 6.0L 6.2 1999-2013

Chevrolet Express 1500 5.3L 2003-2014

Chevrolet Express 2500 4.8L 5.3L 6.0L 2003-2020

Chevrolet Express 3500 4.8L 6.0L 2003-2017

Chevrolet Trailblazer 6.0L 2006-2009

Chevrolet Trailblazer EXT 5.3L 2003-2006

Chevrolet Silverado 1500 4.8L 5.3L 6.0L 1999-2013

Chevrolet Silverado 2500 5.3L 6.0L 1999-2004

Chevrolet Silverado 3500 6.0L 2001-2006

Silverado 1500 HD 6.0L 2001-2006

Chevrolet Silverado 2500 HD 6.0L 2001-2019

Chevrolet Silverado 3500 HD 6.0L 2007-2019

Chevrolet Silverado 1500 Classic 4.8L 5.3L 6.0L 2007

Silverado 1500 HD Classic 6.0L 2007

Silverado 2500 HD Classic 6.0L 2007

Silverado 3500 Classic 6.0L 2007

Chevrolet Suburban 1500 5.3L 6.0L 2000-2014

Tahoe 4.8L 5.3L 2000-2014

Chevrolet Suburban 2500 6.0L 2000-2013

Chevrolet Suburban 3500 HD 6.0L 2016-2019

GMC Envoy XL 5.3L 2003-2004

GMC Envoy XUV 5.3L 2004

GMC Savana 1500 5.3L 2003-2014

GMC Savana 2500 4.8L 5.3L 6.0L 2003-2020

Savana 3500 4.8L 6.0L 2003-2020

GMC Yukon 4.8L 5.3L 6.0L 2000-2014

Yukon XL 1500 5.3L 6.0L 2000-2014

GMC Yukon XL 2500 6.0L 2000-2013

GMC Sierra 1500 4.8L 5.3L 6.0L 1999-2013

GMC Sierra 2500 5.3L 6.0L 1999-2004

GMC Sierra 3500 6.0L 2001-2006

Sierra 1500 HD 6.0L 2001-2006

GMC Sierra 2500 HD 6.0L 2001-2019

GMC Sierra 3500 HD 6.0L 2007-2019

GMC Sierra 1500 Classic 4.8L 5.3L 6.0L 2007

Sierra 1500 HD Classic 6.0L 2007

Sierra 2500 HD Classic 6.0L 2007

Sierra 3500 Classic 6.0L 2007

CTS 5.7L 6.0L 2004-2007

Escalade 5.3L 6.0L 2002-2005

Escalade ESV 6.0L 2003-2006

Escalade EXT 6.0L 2002-2006

Buick Rainier 5.3L 2004

Hummer H2 6.0L 2003-2007

Hummer H3 5.3L 2008-2009

Saab 9-7x 5.3L 6.0L 2008-2009

Hummer H3T 5.3L 2009

Pontiac Firebird 5.7L 1998-2002

Pontiac G8 6.2L 2009

Pontiac GTO 5.7L 6.0L 2004-2006

• Function

The primary function of an oil pump is to pressurize and circulate engine oil throughout the engine. It draws oil from the oil pan or sump and delivers it under pressure to critical engine components, such as the bearings, crankshaft, camshaft, pistons, and valve train. This pressurized oil forms a lubricating film between moving parts, reducing friction, heat, and wear.

• Construction

Oil pumps are typically driven directly by the engine crankshaft or through a timing belt/chain. They consist of several key components:

- Rotor Assembly: Inside the pump housing, there are rotors or gears that rotate to draw in and pressurize the oil.

- Inlet and Outlet Ports: Oil is drawn in through the pump's inlet port from the oil pan and expelled under pressure through the outlet port to the engine's oil galleries.

- Pressure Relief Valve: To prevent excessive pressure buildup, oil pumps often include a pressure relief valve that opens if the pressure exceeds a safe limit, allowing oil to bypass back to the oil pan.

• Operation

1. Engine Running: When the engine is running, the oil pump is driven by the crankshaft or timing belt/chain, depending on the engine design.

2. Oil Suction: The pump draws oil from the oil pan through its inlet port.

3. Oil Pressurization: As the rotors or gears rotate, they pressurize the oil and pump it through the engine's oil passages.

4. Lubrication: Pressurized oil is distributed to engine components, providing lubrication and cooling.

• Importance

- Engine Lubrication: Proper oil circulation and pressure are essential for reducing friction between moving parts and preventing engine wear and damage.

- Heat Dissipation: Oil also helps dissipate heat generated by engine operation, contributing to engine cooling.

- Engine Longevity: A well-functioning oil pump and lubrication system contribute to the longevity and reliability of the engine by ensuring components operate smoothly and efficiently.

• Maintenance

Oil pumps are designed to be durable, but they can wear out over time due to high mileage, improper maintenance, or contaminants in the oil. Signs of a failing oil pump include:

- Low Oil Pressure Warning Light: Illuminated due to insufficient oil pressure reaching critical engine components.

- Engine Noise: Such as rattling or ticking noises, which can indicate inadequate lubrication.

- Poor Engine Performance: Reduced power output or rough engine operation may occur if lubrication is compromised.

• Replacement

If an oil pump fails or malfunctions, it typically requires replacement. This involves accessing the pump, which can vary in difficulty depending on the engine design. Replacement should be performed by a qualified mechanic to ensure proper installation and function.

In summary, the oil pump is a crucial component in an engine's lubrication system, responsible for maintaining proper oil pressure and circulation to ensure optimal engine performance, longevity, and reliability. Regular maintenance and prompt replacement when necessary are essential for preserving engine health.