Skip the auto shop - Our mechanics make house calls

Q: Engine has sludge.

asked by on

My engine has sludge in it. The dealer says the engine needs to be replaced. Can sludge be removed? If so, what is the cost? If not, what is the cost of replacing an engine?

A: Replacing an engine is a very costly repair...

Replacing an engine is a very costly repair. Oil sludge often results from contaminated or neglected oil. Not having oil changed at regular specified maintenance intervals will cause sludge to build up inside the engine. Sludge if not excessive can be removed via an oil system flush. A flush consists of a detergent additive that is run through the engine oiling system and these detergents break down the sludge and then the oil system is drained. Unfortunately, though once excessive oil sludge develops in the engine lubricated engine parts become starved of oil and premature wear of components and failure often occurs. Before replacing an engine though I would recommend a second opinion by a mechanic, such as one from YourMechanic, who can determine if a flush can save the engine or if an engine replacement is going to be the only option.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: After starting SUV, 4 indicator lights come on

There are several reasons that this could happen. A system voltage dip or spike can cause all of these systems to illuminate their indicators or a fault that compromises the drivability of the engine such a mass airflow or oxygen...

Q: Door not closing.

Ford actually issued a recall regarding faulty door latches. I suggest calling your local Ford dealer with the VIN of your vehicle to see if it is covered. If not, a trained mechanic, like one from YourMechanic, can install a...

Q: Does my car require synthetic engine oil or any oil additives?

Take a look at any auto parts store today and you’ll see a ton of different options when it comes to engine oil. There’s conventional oil, synthetic oil, and even conventional/synthetic blends. Any oil can be used in your Accord,...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.