Engine Replacement – Some Basic Tips Where To Start

Engine Replacement-Rebuilt Engine
Engine Replacement-Rebuilt Engine

Engine replacement is one of the more difficult tasks a mechanic may ever face.

Engine replacement requires different approaches for every year, make and model.

I would suggest getting a service manual specific to your vehicle.

So, Engine replacement is much more complicated than simply pulling the old engine and bolting up a fresh one.

If your vehicle is in relatively good shape engine replacement makes more sense than replacing the vehicle.

Some Basic Tips Where To Start

Any time you’re replacing your engine, you need to work methodically to get it right the first time.

If a mistake is made early on, it could mean hours of excess work.

Don’t be afraid to go to an expert for help when it’s needed.

It will save you a lot of time, money and headaches in the long run.

If your old engine had 150,000 miles on it, so do other parts like:

  • Power steering
  • Air conditioner
  • Cooling system
  • Charging system
  • Starting system
  • Transmission
  • Sensors and relays

Odds are they all need to be replaced or at least tested.

If you ignore these basic tips there’s no guarantee you won’t be facing constant repair bills.

While the process may be different from vehicle to vehicle, some elements of an engine swap are fairly universal.

Some basic tips that should be done or checked before engine replacement:

  • Check the motor mounts. Replace if they are worn, loose or cracked. If the engine has fluid-filled hydroelastic motor mounts, check for leaks. Replacing same with same is recommended if the mounts are leaking to minimize vibration and harshness.
  • Check the condition of the clutch or torque converter, transmission, CV joints, U-joints, etc., and make any repairs as needed.
  • Some items that will be mounted on the engine such as manifolds, brackets, accessories, spark plugs, oil filter, sensors, etc. will probably be easier to install on the engine while it is still out of the vehicle. Preassemble as much as you can, then finish the rest of the items once the engine is in place.
  • Install new belts and hoses (also, check automatic tensioners and idler pulleys and replace as needed).
  • Install new oxygen sensor(s). This is highly recommended on high-mileage engines to guarantee proper fuel feedback control, good fuel economy and emissions compliance.
  • Install a new coolant temperature sensor and thermostat. This also is highly recommended to reduce the risk of overheating and possible engine damage.
  • Install new spark plugs, plug wires, distributor cap and rotor (if equipped). Platinum long-life spark plugs are recommended.
  • Scan the computer for fault codes, fix any problems as needed, and clear the code memory.
  • Check for any PCM flash updates that may be available from the OEM and reflash the computer as needed.
  • Check for any engine-related technical service bulletins that are out on the vehicle, and make any upgrades or changes as recommended.

Consider the junkyard used engine.

Used Engine
Used Engine

This is where you can find late model wrecks with perfectly good engines.

When your car engine fails and you come to the grim realization that you have to start looking for another engine, it may not have occurred to you to look for a used engine instead of a new one.

However, relatively speaking, installing a used engine in your car is not much different than purchasing a used car; in fact, it’s a lot cheaper! Keeping the car you have and looking for a used engine is generally the most cost-effective solution. Like purchasing a used car, there are several advantages and disadvantages to purchasing a used engine.

Whether or not you should choose to install a used engine depends upon your budget and willingness to step outside your comfort-zone a bit in order to save money. The only catch is, you will need to be aware of what a reliable used car engine looks like. Before you begin the process of buying a new engine, consider the following information about used engines.

There are plenty of reliable, used engines that need to be recycled and are perfectly fine given a thorough inspection. Make sure you understand what warranty comes with a used engines. This is another way to ensure that your purchase of a used engine remains protected for an extended period of time.


If your engine is nearing the end of its useful life, you may wonder whether to rebuild or replace it. As a result, The warranty available could play a role in what type of engine you choose.

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