Break-In Procedure: 4 Tips to Break-In a Rebuilt Engine

It must be a sigh of relief to see your car fixed and installed with a rebuilt engine. You must have spent your precious time and energy to find a rebuilt engine for sale, that right-fitting rebuilt engine for your car, and the receipts are proof of it. However, the moment of truth is not there yet. Before you turn the key and take your renewed car out for the first time, there are a few important things you must do to ensure the smooth functioning of all the components of a car. All engines and even good used engines need to be broken in.

Therefore, to help you with the break-in procedure, we have listed a few tips that might prove to be beneficial.

What is the break-in procedure?

To put it simply, a break-in procedure allows the rebuilt engine some time to adjust and operate evenly after it has been installed in a car. It ensures that no auto parts or components are put under undue pressure early on. Thus, most manufacturers recommend breaking in a rebuilt engine and even new cars. It also ensures that the usual wear of the engine is kept to a minimum, and the oil continually flows smoothly through all moving parts. It goes without saying that considering the effort you put in to find used engines for sale in Houston, the last thing you want is for it to lose power. Hence, a careful and successful break-in procedure is imperative for engine health.

4 Tips to Break-In a Rebuilt Engine

1. Don’t Be Too the Engine:

The first rule of the break-in procedure is to make sure that you are not pushing the engine to the red line, at least in the first 1,000 miles. Doing so would put a lot of unnecessary strain on the piston rings and cylinders.

2. Switch Gears at a Low Speed:

Since the objective of the break-in process is to allow all the parts of a car to adjust to one another, changing gears at a low speed might help avoid unnecessary wear and tear.

3. Avoid Aggressive Acceleration:

When we buy a cheap used engine online or a rebuilt engine, it might be tempting to test it and floor the accelerator as soon as the car is out on the open road. However, aggressive acceleration when the car is cold can prove to be disastrous for both, the engine, and the car.

4. Avoid Short Trips Which Don’t Give the Engine Time to Warm Up:

Short trips are not considered to be ideal for newly rebuilt engines as the cold engine would have to work harder and strain the oil delivery cycle.


If you are in the market for a rebuilt or used engine, it’s best to educate yourself regarding the break-in procedure before you start googling “where to buy engines near me” and avoid any sort of break-in failures.

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