Learn About Your Car

Are you interested in certification?

Schedule a Demo

Estimates last updated June 18, 2026

2020 Toyota Avalon Valve Cover Gasket Replacement Cost

The average cost for a 2020 Toyota Avalon Valve Cover Gasket Replacement is between $400 and $548.

Labor costs are estimated between $317 and $465 while parts are typically priced around $83.
This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
For a more accurate estimate based on your location, use our Fair Price Estimator below.

Valve Cover Gasket Replacement

What is a valve cover gasket?

The valve cover sits atop the cylinder head, and the valve cover gasket is sandwiched between them to keep circulating oil inside. The majority of valve cover gaskets are molded rubber, tailored to fit. In some cases, the spark plug tube gaskets are part of the valve cover gasket, and are replaced at the same time. Valve cover gaskets are different than head gaskets.

Valve cover gaskets need to be replaced when they begin to leak oil. They can damage other engine components, especially belts and hoses.

Oil leaking from valve cover gaskets can result in a burning smell coming from under the hood.

What are the symptoms related to a bad valve cover gasket?

A bad valve cover gasket will result in an oil leak. You may notice oil under the car or on other parts under the hood. You might also notice a burning smell while driving. » LEARN MORE: Signs of a bad valve cover gasket

Toyota Valve Cover Gasket Replacement Cost Estimates

The average cost for a Valve Cover Gasket Replacement is between $400 and $548 but can vary from car to car.

Toyota Avalon Valve Cover Gasket Replacement Cost by Year

The average cost for a Toyota Avalon Valve Cover Gasket Replacement is between $400 and $548 but can vary from car to car.

Disclaimer

Materials Included Under License from Toyota Motor Sales, U.S.A., Inc. License Agreement TMS1008. All information contained in any materials obtained about Toyota, Lexus, and Scion vehicles is based on the latest product information available at the time of publication, is provided “as is” without warranty of any kind, and is intended for service providers and other interested parties in Canada, Mexico, and the United States of America, including Guam, Puerto Rico, and the U.S. Virgin Islands. Specifications and procedures are subject to change without notice. This information is provided expressly for the purpose of use by professional automobile technicians who have special techniques and certifications. Repair or service by non-specialized or uncertified technicians using only this information, or without proper equipment or tools, may cause severe injury to the individual or other individuals and could possibly cause damage to the vehicle. Certain procedures or content elements may make reference to Toyota Warranty policy or practice – these policies or practices are only applicable to Toyota, Lexus, or Scion dealers.

More RepairPal Resources

Valve Cover Gasket Replacement

Jump to:Commonly associated repairs Cost estimates by vehicle Cost estimates by year

What is a valve cover gasket?

Valve cover gaskets need to be replaced when they begin to leak oil. They can damage other engine components, especially belts and hoses.

Oil leaking from valve cover gaskets can result in a burning smell coming from under the hood.

What are the symptoms related to a bad valve cover gasket?

Can I drive with a valve cover gasket problem?

A vehicle can still be driven with a leaking valve cover, but the leaking oil will cause other problems over time. Spark plug wells can fill with oil, causing a misfire. Oil dripping on coolant hoses will cause them to become soft and eventually burst. And the smell of burning oil will become more noticeable in the cabin.

How often do valve cover gaskets need to be replaced?

Repair intervals vary greatly by vehicle and driving conditions. The valve cover gasket does not wear like a tire or a ball joint, but eventually the gasket's rubber or cork will degrade to the point where it leaks.

How are valve cover gasket issues diagnosed?

It is easiest to spot oil leaks when they are new or fresh. The technician may clean the fluid around the leak and direct you to come back later to confirm where the leak is coming from. With more progressed oil leaks, the technician will also add a dye to the oil. After the vehicle has been driven with the dye, a UV light will be used to pinpoint the leakage and recommend repair.

Components such as spark plug tube seals and grommets can also leak oil, which can be mistaken for a leaking valve cover gasket. The seals and the valve cover gasket should always be replaced together. Some valve cover gasket kits may not include these seals and grommets, in that case the RepairPal estimate would not include them either and adding them could result in an additional cost for parts and labor to the customer.

How is a valve cover gasket replaced?

The technician will remove the valve cover, remove the old gasket, and clean all gasket surfaces before installing the new valve cover gasket. On some engines, removal of the intake manifold, or other major parts may be required in order to access the fasteners on the cover. After completion, the area will be checked for leaks.

Using high-quality valve cover gaskets will reduce the chance of recurring leaks and additional repairs.

Get a RepairPal Fair Price Estimate® for your 2020 Toyota Avalon.

Our Fair Price Estimate will help you avoid overpaying based on your car, needed service, and labor rates in your area.