Skip the auto shop - Our mechanics make house calls

Q: Knocking noise coming from the crankshaft

asked by on

About 6 months ago I had to get my heads rebuilt due to a water leak . after the car was finished I drove it around for 3 months and than a knocking noise occurs yes the oil was low and yes the fuel injectors are faulting. check engine light is on..I'm not sure on what it might be . but getting the heads rebuilt is the same as getting the engine rebuilt isn't it??

My car has 235000 miles.
My car has a manual transmission.

The cylinder heads are one part of the complete engine package. As such, when they are rebuilt, other critical components such as connecting rods, bearings, pistons and cylinder sleeves are not replaced. If your head gasket broke, causing water to leak into the engine, that may have caused some of the other engine components inside the block to fail or wear out prematurely. This may be the source of your knocking issues however it also may be caused by low oil pressure or low oil levels. To be certain, you should contact a professional mechanic to complete an engine is knocking inspection so they can pinpoint the source of your issues and suggest the right corrective action.

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

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: Car will start but won't idle

This may be a sign of a failing idle air control valve. The idle air control valve is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected...

Q: Starter spinning and not engaging flywheel 1991 Nissan Maxima

Hi there - sounds like the starter "bendix drive" has failed. This is the component on the starter motor shaft that cause the starter motor to engage the flywheel as it spins up. Somewhat unusual failure these days - but...

Q: Engine light and throttle body light come on every morning when first start

Hi there. Check the Manifold Absolute Pressure (MAP) sensor voltage. Key on engine off it should be approximately 4.5 volts, idling in the 1 volt range and go over 4 volts at a snap throttle. Then, check the Throttle Position...

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...