Skip the auto shop - Our mechanics make house calls

Q: Engine not running correctly after rebuild

asked by on

I recently had my engine rebuilt, but the mechanic who did the work, did a rush job. I believe my issue stems from bad valve seals or possibly piston rings. I feel like I should get a compression test done first to help determine the true nature of my problem.

I’d need to know the symptoms you are having but I’m assuming the engine is burning oil. Valve seals control the oil that lubricates the valve stems and prevents it from seeping into the guides in excessive amounts. The piston rings seal the combustion chamber and stop oil from getting in. Problems with either of these two items could cause you vehicle to burn oil. A trained professional, such as one from YourMechanic, has the right knowledge and equipment to diagnose your vehicle and determine what repairs should be made.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Timing chain valve is bad

A worn timing chain can cause some camshaft timing to become erratic and cause a host of engine running issues. However, there is a tensioner on the lower part of the engine that is supposed to remove the slack automatically...

Q: Why would my check engine light come on in my 2005 Honda Fit after it was serviced

Hello. It is not normal for the check engine light to come on after being serviced. Either something was not installed correctly or one of the parts is wrong. It may also be something completely different. I usually start by...

Q: Shifting issues, grinding noise. 2013 Scion FR-S

Hello. One option would be to adjust your clutch pedal or have it adjusted by a professional. It is also possible that there is a problem with the clutch slave cylinder. When this part is faulty it will cause a...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...