2004 Workhorse W42 Engine Parts

Below you will find various in-demand Workhorse Engine Parts, components and accessories for your 2004 W42. Advance Auto Parts has popular W42 parts like Oil Cooler Parts, Engine Gaskets and Seals, Valve Cover and Cylinder Heads and more. You’ll also find aftermarket and OEM Engine Parts for other W42 model years including 2005, 2006, 2007, 2008, 2009, 2010, 2011 and more. Select a category of 2004 Workhorse W42 Engine Parts below and start saving instantly.

Popular 2004 Workhorse W42 Engine Parts Categories

Oil Cooler Line Connectors

Turbocharger Wastegate Solenoids

Engine Oil Filler Grommets

Essential Engine Parts for 2004 Workhorse W42s

from

$25.99

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:

DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
ENGINEERED TO PERFORM — Proprietary cork-rubber formulation
SUPERIOR SEAL — Highly conformable to accommodate for the imperfect sealing surfaces
EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road

from

$21.49

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:

DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
ENGINEERED TO PERFORM — Proprietary cork-rubber formulation
SUPERIOR SEAL — Highly conformable to accommodate for the imperfect sealing surfaces
EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road

from

$36.99

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:

DESIGNED FOR IMPERFECT SEALING SURFACES — Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
ENGINEERED TO PERFORM — Proprietary cork-rubber formulation
SUPERIOR SEAL — Highly conformable to accommodate for the imperfect sealing surfaces
EVERY PART FOR THE REPAIR — Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road

from

$167.99

Made in USA. Melling oil pumps provide dependable performance every time in every application. Every Melling oil pump is engineered and assembled to the highest production standards from high quality materials. All Melling oil pumps use the latest in gear and gerotor technology to provide the highest level of quality and performance. Gears are machined to close tolerances to ensure proper engine pressure and correct, efficient pump operation. End plates are precision ground for maximum wear resistance. Every Melling oil pump is individually tested for pressure and flow under conditions designed to duplicate actual engine operating conditions.

Product Features:

Manufactured from high quality materials for consistent durable wear
Precision engineered for optimum fit and function
Designed for long-life and worry-free performance
Meets or exceeds original equipment specifications

from

$184.99

This replacement valve cover matches the fit and function of the original equipment part that may be damaged or warped. Made from quality materials for excellent fit and superior heat resistance, this valve cover has undergone extensive testing.

Product Features:

Direct replacement – this valve cover matches the original equipment part for fit and function.
Durable construction – this valve cover is made of quality materials to withstand extreme temperatures to resist leaking.
Cost-effective solution – offers original equipment performance at competitive price
Quality tested – this part has undergone try-on and material testing to ensure a quality fit and reliable service

from

$185.99

Direct replacement – this valve cover matches the original equipment part for fit and function.
Durable construction – this valve cover is made of quality materials to withstand extreme temperatures to resist leaking.
Cost-effective solution – offers original equipment performance at competitive price
Quality tested – this part has undergone try-on and material testing to ensure a quality fit and reliable service

from

$8.79

This engine oil cooler line connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:

Direct replacement – this engine oil cooler line connector matches the appearance and function of the factory hardware on specified applications.
Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue.
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

from

$3.99

This engine oil filter tube grommet is designed to match the fit and function of the original grommet on specified vehicles, and is engineered for durability and reliable performance.

Product Features:

Direct replacement – this engine oil filter tube grommet is designed to match the fit and function of the original grommet on specified vehicles.
Restores functionality – this grommet is made to fit and fully restore part functionality after the original grommet fails
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$274.99

Oil pan leaking? This engine oil pan is precision-engineered to match the original equipment pan on specific vehicle years, makes and models for a reliable replacement.

Product Features:

Direct replacement – this engine oil pan is made to match the original pan on specific vehicles.
Complete assembly – includes replacement pan and drain plugs to match original components.
Durable design – high-strength coating prevents future corrosion
Trustworthy value – backed by team of engineers and quality control experts in the United States

from

$262.99

Oil pan leaking? This engine oil pan is precision-engineered to match the original equipment pan on specific vehicle years, makes and models for a reliable replacement.

Product Features:

Direct replacement – this engine oil pan is made to match the original pan on specific vehicles.
Complete assembly – includes replacement pan and drain plugs to match original components.
Durable design – high-strength coating prevents future corrosion
Trustworthy value – backed by team of engineers and quality control experts in the United States

from

$272.99

Oil pan leaking? This engine oil pan is precision-engineered to match the original equipment pan on specific vehicle years, makes and models for a reliable replacement.

Product Features:

Direct replacement – this engine oil pan is made to match the original pan on specific vehicles
Complete assembly – includes replacement pan and drain plugs to match original components
Durable design – high-strength coating prevents future corrosion
Trustworthy value – backed by team of engineers and quality control experts in the United States

from

$246.99

Oil pan leaking? This engine oil pan is precision-engineered to match the original equipment pan on specific vehicle years, makes and models for a reliable replacement.

Product Features:

Direct replacement – this engine oil pan is made to match the original pan on specific vehicles
Complete assembly – includes replacement pan and drain plugs to match original components
Durable design – high-strength coating prevents future corrosion
Trustworthy value – backed by team of engineers and quality control experts in the United States

from

$43.99

This turbocharger wastegate solenoid is designed to match the fit and function of the original solenoid on specified vehicles, and is engineered for durability and reliable performance.

Product Features:

Direct replacement – this turbocharger wastegate solenoid is designed to match the fit and function of the original solenoid on specified vehicles.
Ideal solution – this solenoid is a reliable replacement for an original part that is damaged or has failed due to fatigue, excessive heat or electrical current.
Durable construction – this solenoid is made from quality components to ensure reliable performance and a long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

Upgrade your 2004 Workhorse W42 with Top-Quality Engine Parts

When it comes to maintaining or upgrading your 2004 Workhorse W42, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Workhorse or enhancing its overall performance, Engine Parts are key to keeping your W42 functioning at its best. At Advance Auto Parts, we offer a wide selection of 8 Engine Parts for the 2004 Workhorse W42, designed to meet your needs without breaking the bank. From Oil Cooler Part replacements to Engine Gaskets and Seals upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Engine Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Engine Parts for your 2004 Workhorse W42 at great prices. Our Engine Parts inventory for this model ranges from just $3.99 to $262.99, with an average price of $116.15. Our 8 Engine Parts in stock come from 3 trusted brands, so you’re sure to find the right part for your 2004 Workhorse W42 without overspending.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Engine Part upgrades. Explore related part types like Batteries and Chargers, Fluids and Chemicals and more to make sure your 2004 Workhorse W42 is always ready to roll. We’re committed to providing you with everything you need to keep your W42 in top shape, all in one place. Start shopping confidently below for your 2004 Workhorse W42!

Best-Selling Oil Cooler Parts for 2004 Workhorse W42s

Enhance the driving experience in your Workhorse with 1 quality Oil Cooler Part components, starting at $8.79.

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from

$8.79

Direct replacement – this engine oil cooler line connector matches the appearance and function of the factory hardware on specified applications.
Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue.
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

Top Picks for 2004 Workhorse W42 Valve Cover and Cylinder Heads

Upgrade Workhorse W42s with top-quality Valve Cover and Cylinder Heads parts, including 1 OEM and aftermarket selections for your 2004 model.

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from

$185.99

Direct replacement – this valve cover matches the original equipment part for fit and function.
Durable construction – this valve cover is made of quality materials to withstand extreme temperatures to resist leaking.
Cost-effective solution – offers original equipment performance at competitive price
Quality tested – this part has undergone try-on and material testing to ensure a quality fit and reliable service

In-Demand Oil Pans for 2004 Workhorse W42s

Select from 1 premium Oil Pans parts for your 2004 Workhorse W42.

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from

$262.99

Oil pan leaking? This engine oil pan is precision-engineered to match the original equipment pan on specific vehicle years, makes and models for a reliable replacement.

Product Features:

Direct replacement – this engine oil pan is made to match the original pan on specific vehicles.
Complete assembly – includes replacement pan and drain plugs to match original components.
Durable design – high-strength coating prevents future corrosion
Trustworthy value – backed by team of engineers and quality control experts in the United States

Most Sold 2004 Workhorse W42 Oil Pumps

Explore our best-selling Workhorse parts for the 2004 W42 among 2 OEM and aftermarket options starting from $167.99.

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from

$167.99

Manufactured from high quality materials for consistent durable wear
Precision engineered for optimum fit and function
Designed for long-life and worry-free performance
Meets or exceeds original equipment specifications

Stock Replacement Oil Pump: High Volume, Standard Pressure, Cast Iron, Without Gasket

from

$233.99

FAQs for 2004 Workhorse W42 Engine Parts

Which Engine Parts are best-sellers for 2004 Workhorse W42s?

Out of 8 Engine Parts that fit 2004 Workhorse W42s, the following parts are the top sellers:

Engine Valve Cover Gasket Set (5183332) – $21.49
Stock Replacement OE Type Oil Pump and Screen (20680959) – $167.99
Oil Cooler Line Connector (17191166) – $8.79

What’s the price range for 2004 Workhorse W42 Engine Parts?

Engine Part prices for the 2004 Workhorse W42 start at $3.99 and go up to $262.99 for the most premium parts.

What’s the average price of a Engine Part for a 2004 Workhorse W42?

The average price for Engine Parts for the 2004 Workhorse W42 is $116.15. Keep in mind the variety of part types within our Engine Part category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Parts for other Workhorse W42 model years?

Yes, we currently carry Engine Parts for 7 model years of Workhorse W42s between 2005 and 2011. Engine Parts are bought most frequently for the following model years: 2011, 2010, 2009, 2008, 2007, 2006, and 2005.

What are the cheapest Engine Parts for my 2004 Workhorse W42?

The cheapest 2004 Workhorse W42 Engine Parts we carry in stock are:

Oil Filler Tube Grommet – GM 1991-1982 – Fits Trucks and Vans W/ 4.3z – 5.0h – 5.7k – 6.2z & 6.2j Diesel (12023417) – $3.99
Oil Cooler Line Connector (17191166) – $8.79
Engine Valve Cover Gasket Set (5183332) – $21.49
Wastegate Controller Solenoid (10306506) – $43.99
Stock Replacement OE Type Oil Pump and Screen (20680959) – $167.99

What types of Engine Parts do you sell for my 2004 Workhorse W42?

As of 2/5/25, these are some of the most in-demand types of Engine Parts for a 2004 Workhorse W42:

Can I get help with 2004 Workhorse W42 Engine Part orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Workhorse Engine Parts and more.

What is your return policy for Workhorse W42 Engine Parts?

Advance Auto Parts keeps returns simple. For new Workhorse W42 Engine Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2004 Workhorse W42 Engine Parts

Felpro – Engine Valve Cover Gasket Set (Part No.VS 50504 R)

Felpro – Engine Valve Cover Gasket Set (Part No.VS 50228 C)

Felpro – Engine Valve Cover Gasket Set (Part No.VS 50504 R-1)

Melling – Stock Replacement OE Type Oil Pump and Screen (Part No.M255-294S)

Dorman – Valve Covers: With Gasket, Direct Replacement, Aluminum, Driver Side (Part No.264-965)

Dorman – Valve Covers: With Gasket, Direct Replacement, Stamped Steel, Passenger Side (Part No.264-986)

Dorman – Oil Cooler Line Connector (Part No.800-705)

Dorman – Help – Oil Filler Tube Grommet – GM 1991-1982 – Fits Trucks and Vans W/ 4.3z – 5.0h – 5.7k – 6.2z & 6.2j Diesel (Part No.42305)

Dorman – Engine Oil Pan: Direct Fit, Aluminum, Rear Sump, 5 Quart (Part No.264-135)

Dorman – Engine Oil Pan: Direct Fit, Steel, Rear Sump (Part No.264-163)

Dorman – Engine Oil Pan: Direct Fit, Aluminum, Center Sump, 5 Quart (Part No.264-375)

Dorman – Engine Oil Pan: Direct Fit, Aluminum, Center Sump, 5 Quart (Part No.264-480)

Dorman – Wastegate Controller Solenoid (Part No.904-236)

Dorman – Oil Cooler Line Connector (Part No.800-705)

Felpro – Engine Valve Cover Gasket Set (Part No.VS 50228 C)

Dorman – Valve Covers: With Gasket, Direct Replacement, Stamped Steel, Passenger Side (Part No.264-986)

Dorman – Engine Oil Pan: Direct Fit, Steel, Rear Sump (Part No.264-163)

Melling – Stock Replacement OE Type Oil Pump and Screen (Part No.M255-294S)

Melling – Stock Replacement Oil Pump: High Volume, Standard Pressure, Cast Iron, Without Gasket (Part No.M255HV-294S)