Skip the auto shop - Our mechanics make house calls

Q: knocking in my engine

asked by on

I noticed knocking in my engine it was low but not that low had 7 quarts in the engine left give or take and all of a sudden my engine started knocking. I have a rebuilt engine with on 18,000 on the engine. Not sure what happened. Do you think my engine is shot with about 7 quarts left in the engine.

My car has 240000 miles.
My car has an automatic transmission.

I’m assuming the truck has the 5.9ltr Cummins engine. While I cannot say if the engine is "shot" without looking it over myself, this engine has a 12 quart capacity. Being low 5 quarts is nearly 50% low on oil. That certainly could have caused some damage internally. If there are no oil leaks present to justify a 5 quart loss, then a compression test should be performed to determine if the engine is burning oil. As for the knocking noise, the cause might be best determined by whichever technician you choose to inspect the engine. It can very well be a connecting rod causing the noise.

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!
  1. Home
  2. Questions
  3. knocking in my engine

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: My temperature gauge reads cold - 2004 Chrysler Sebring

Hello there. A few common faults will cause your 2004 Chrysler Sebring to to stay at C on the temperature gauge. The most common are a faulty coolant temperature sensor, failing temperature gauge, or wiring harness fault. If the engine...

Q: Engine won't start.

You should get your 'no start' inspected by a qualified technician. The most common problem on this vehicle for a 'no start' is the fuel pump and filter. The fuel pressure will have to be checked by a certified qualified...

Q: My transmission won't go in reverse. Our mechanic said the ECM is bad. Would that cause that?

Hello. No, the ECM by itself should not cause a transmission failure. I suspect the low/reverse band has gone out on your transmission. The newer electronic transmissions have the ability to adjust to wear in the various clutches and bands...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...