How to Break In a New Camshaft Properly (Flat Tappet)

Understanding the Importance of camshaft Break-In

Breaking in a new flat tappet camshaft is crucial for ensuring its longevity and performance. Unlike roller camshafts, flat tappets are more susceptible to wear during the initial operation. The break-in process allows the cam lobes and lifters to create a proper mating surface, significantly reducing the risk of premature failure.

During the break-in period, the oil film between the camshaft and lifters must be able to withstand high pressures and friction. This is why selecting the right type of oil is essential, as it can influence the effectiveness of the break-in. Using a high-zinc oil or a dedicated break-in oil will provide the necessary protection against wear.

Preparing for the Break-In Process

Before you begin the break-in process, there are several preparations to take into account. First, ensure that your engine is clean and free of any debris that could contaminate the oil. Change the oil filter and use fresh oil to eliminate potential contaminants that could harm the camshaft during break-in.

Next, you should prime the oil system to ensure that oil reaches the camshaft and lifters before starting the engine. This can be done by using a priming tool or by cranking the engine with the ignition disabled until oil pressure is built up. Proper priming minimizes the risk of dry starts, which can lead to immediate damage.

The Break-In Procedure

Once your engine is ready, it’s time to start the break-in process. Begin by starting the engine and allowing it to idle for about 20 to 30 minutes. During this time, monitor the oil pressure closely and watch for any unusual noises. It’s important to keep the engine at a steady temperature without allowing it to overheat.

After the initial idling period, you should gradually increase the engine RPMs. Take the vehicle through various RPM ranges while avoiding prolonged periods at any single RPM. This helps the camshaft and lifters to seat properly. Aim for short bursts of acceleration followed by deceleration to allow the components to bed in effectively.

Post-Break-In Maintenance

After completing the break-in period, it’s critical to perform a thorough inspection of the engine. Change the oil and filter again to remove any metal particles that may have accumulated during the break-in process. This is a vital step to ensure long-term engine health.

Additionally, check the valve adjustment and make sure it is set correctly. A misadjusted valve train can lead to increased wear and reduced performance. Regular monitoring and maintenance of the camshaft and associated components will help maintain the integrity of your engine over time.