How To Know If Your Car Engine Needs An Overhaul

Updated Aug 04, 2020 | Same topic: Handy Maintenance Tips

Read to know what is an engine overhaul and 5 common signs that you need an engine overhaul.

When your engine is beginning to perform less, you may require an engine overhaul. At the point when an engine has been overhauled, it is dismantled, cleaned, reviewed, and repaired according to its needs and malfunctions. When an engine problem or malfunction arises, sometimes it is better to have it overhauled than totally replacing it. This can likewise spare you cash by restoring the old engine and not buying a brand new one.

But, what is engine overhaul by the way? When is the best time to do an engine overhaul? If you are pondering on these questions, you might want to continue reading this article from to help you with your research.

I. What is an engine overhaul?

When an engine needs an overhaul, a couple of fundamental things are done to re-establish it to a close-to-brand-new state of function. The lower half of the motor is removed and is dismantled then cleaned with the goal that it may be appropriately assessed depending upon the state of the inner parts of the cylinder rings, bearings, and motor, or if they may need to be replaced.

The inside of the cylinders are likewise reconditioned to ensure the cylinder rings can appropriately fit with the cylinder dividers or walls. The motor is then reassembled and returned back again into its place in your car. This thrifty choice is recommended if there is only a small issue or part on your engine that needs to be fixed.

Engine overhauling - before and after

Engine overhauling re-establishes your car engine to a close-to-brand-new state of function

More broad revamping is viewed as a noteworthy motor upgrade, and this requires the entire motor to be lifted from the undercarriage, so it tends to be altogether dismantled. Each nut, fastener, and removable part is cleaned and supplanted with a new, unique production line motor parts.

Along these lines, a total motor update is more costly than an in-undercarriage reconstruct, for clear reasons – the motor must be expelled from the body, be that as it may, your vehicle's motor will work like new or better. Motor overhauls regularly require some level of motor modifying, in such manner, it is very normal.

This is the reason numerous individuals reconstruct their vehicle's motors at regular intervals, particularly for auto devotees who care especially how well their autos sound, capacity and look. A motor modify can make your motor look sufficient to contend in auto appears, yet most people simply need their vehicles to be trustworthy and run their best, and that is precisely what an auto motor update can do to your auto's motor.

II. 5 Common signs that you need an engine overhaul

In general, there are actually tons of conditions to consider to say that your car already needs an engine overhaul. In connection to that, the following are the major issues that you need to observe to opt for an engine overhaul:

1. White smoke coming out your car’s exhaust

This symptom is usually an indication that the motor is burning inside the compartment which will soon lead to a low oil level that will slow down the performance of the auto in general. As this condition continues, so the early wear and tear of the piston liners and rings affecting the overall function and performance of the engine and the vehicle. The solution for this is to replace the cylinder to restore the function and performance.

White smoke

White smoke from your car's exhaust most likely precedes your engine slowing down

2. Excessive fuel consumption

Your start plugs are in charge of starting ignition in your motor. When they have gone wrong, or already worn out, or are working inadequately, this can influence your fuel economy negatively and will surely poke a hole in your pocket. Fuel injectors are the one responsible for depositing gas into the engine.

Having terrible fuel injectors means terrible mileage. There are a lot of ways to improve your fuel efficiency, but it is still best to have your car and engine checked especially when you are an aggressive driver who usually makes a lot of abrupt stops when driving.

clogged fuel injectors

Having clogged fuel injectors means terrible mileage

3. Reduced power

When your car recognizes particular issues electronically, the motor control module starts the way toward constraining gear range, speed, and motor power. This can be caused by motor turbulence, omissions in transmission, as well as an awful battery.

If the sensor or actuator is out of order, it may cause the transmission to communicate with the unsuitable amount of voltage, leading to an imbalance fuel-air mixture, lowering the oil pressure and resulting to reduced engine power.

engine gauge

Poor maintenance can lead to low engine power

4. Unusual knocking noise when accelerating

When you accelerate, the weight on your car can draw out noise you that won’t bother you generally.

Unusual knocking sound frequently happens when the balance of air and fuel is wrong, which makes the fuel consumption in an imbalanced state as opposed to even gushes. Most often, the common cause of this is a clogged filter and fuel hoist screen which will then result to oil leaks and fuel burn inside the chamber. 

Left unmanaged, it can harm the cylinder and piston wall by lacking lubrication on this parts. The best treatment for this problem is to change the filters and have a regular change oil and engine check-up.

car engine filter

Simply changing the filter can solve the noise which can be determined thru an engine overhaul

5. Valves are damaged and no longer closes well

When a valve fails to closes adequately, the combustion fuels stream past the valve seat and makes the valve head heat up. This results in the car engine's overheating and burning of the valve head in the seat area. The valve head can't withstand the high temperature and machinery loads and curves inwards.

The backflow hot fuel results to carbon build-up in the stem guide area and will then cause fractures or cracks on the valve head.

Engine valve failure

Engine valve failure results from burnt exhausts

Having your motor updated or overhauled does not need to be a noteworthy cost or bother. If there is any indication of wear to the motor bearings, it is normally best to have an overhaul done. So that you can have every possible issues that can occur with your motor checked, it is necessary to make a point to go to the scheduled tune-ups car maintenance. This makes sure that your vehicle is always in good running condition.

Hanna Sanchez

Hanna Sanchez


Hanna is one of the most competitive swimmers in the country during her day. It was not long before she discovered her passion for the automotive industry as well. Nowadays, she balances her passion through writing as well as coaching.

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