In most cases, a timing belt package—often sold as a timing belt kit—includes the belt itself plus the parts that wear with it, and may also include the water pump and assorted seals. Exact contents depend on the vehicle and the kit type.
Automakers and retailers increasingly offer two main options: a belt-only kit and a full timing belt kit that bundles the belt with the components needed for a complete replacement. This article explains what you’re likely to find, what to expect from different kit configurations, and how to choose the right package for your engine.
Core inclusions in a timing belt kit
The following items are the most common components you’ll see in a standard timing belt kit. This list reflects what many DIYers and shops expect to be included in a complete replacement package.
- Timing belt itself, sized to fit a specific engine and designed to synchronize the camshafts and crankshaft.
- Tensioner assembly (hydraulic or mechanical) that maintains belt tension and prevents slippage.
- Idler pulley(s) to guide and support the belt path during operation.
- Water pump (included in many full kits) to replace a component that often wears out concurrently with the belt.
- Gasket and seal set, typically including the water pump gasket and other seals needed when the pump or timing cover is removed.
- Installation instructions or a service guide to assist with proper timing and alignment.
Not every kit includes every item. Some belt-only packages will omit the water pump, seals, and installation guidance, while full kits commonly marketed as “timing belt with water pump” will bundle more components for a complete job.
Additional items that may appear depending on the kit
Variation among kits reflects differences in engine design and the service expectations of different brands. The following components may appear in select packages, especially for engines where multiple seals or peripheral parts wear during timing belt replacement.
- Thermostat and thermostat housing gasket, included in some kits where the thermostat is often replaced during timing belt service.
- Additional seals such as camshaft seals or crankshaft seals, which are sometimes replaced when removing the timing cover.
- Extra belt fasteners, bolts, or tensioner mounting hardware that may be required for certain engines.
- Specialty alignment tools or guides (less common in consumer-grade kits, more typical in dealer or professional-grade packages).
As with core inclusions, these extras are not universal. Availability depends on the vehicle make, model, and the kit retailer’s approach to “complete” replacement parts.
How to choose the right timing belt package for your car
Choosing the right kit requires a quick check of your vehicle’s specifics and your service goals. Consider these guidelines when shopping:
- Identify your engine code and year, then verify fit with the kit’s compatibility data.
- Decide between a belt-only kit and a full kit with a water pump based on the condition of the pump and the maintenance interval recommended by the manufacturer.
- Check whether the kit includes seals and gaskets you’ll need to reseal the timing cover and related components.
- Review the warranty and brand reputation, and confirm whether the kit includes installation instructions or access to online guides.
If you’re unsure, consult a repair manual for your exact engine or ask a trusted auto parts professional to verify the correct kit for your vehicle. Proper timing belt installation is critical to engine health and can affect performance and reliability.
Summary
A typical timing belt package can range from a belt-only option to a comprehensive kit that includes the belt, tensioner, idlers, water pump, and a gasket/seal set, with some kits also offering thermostats or extra seals. Contents vary by engine and supplier, so it’s important to confirm exactly what’s included for your specific vehicle and choose the package that best supports a complete, one-and-done timing belt replacement.
How much does a timing belt package cost?
In most cases, a timing belt kit will run between $100 -350. Labor on most timing belts is between 3-5 hours, putting your total cost between $400 -1,000. Remember, do not opt for a “just the belt” replacement. While the cost is cheaper, the chances of further failure increase significantly.
Can a bad timing belt cause a misfire?
A failing timing belt may cause a myriad of symptoms, such as unusual noises coming from under the hood, engine misfires, and poor engine performance. In most cases, if the timing belt fails, the engine will not run at all, and the engine can not be restarted without replacing the timing belt.
Does a timing belt kit include a water pump?
All-inclusive kits that contain everything you need for a professional repair: water pump with gasket when necessary, belt, pulleys, bearings and screws. In order to cater the different needs of the market, timing belt kits are also available without a water pump.
What does a timing belt kit consist of?
AISIN Timing Belt Kits are comprised of the water pump, gasket, timing belt, hydraulic tensioner, idler and bearings where applicable. These components are crucial to the engine's timing system.