Skip the auto shop - Our mechanics make house calls

Q: knocking noises

asked by on

Its a gt. And I was reving it up and then it was a loud noise and now its knocking really bad.Ans im starting to lose power

My car has 380876 miles.
My car has a manual transmission.

A: If the engine truly has nearly 400,000 mile...

If the engine truly has nearly 400,000 miles, based on the symptoms you are describing, I would suspect an internal mechanical problem, one of some significance that might require rebuilding the engine. But, obviously, the source of the noise, and the cause of lack of power, has to be diagnosed. I would recommend a noise diagnostic which would give you an idea of what sort of fault you are dealing with. Even if the engine has to be rebuilt, or if you want to install a rebuilt one, that is all doable. Sometimes, you can get a reasonable "used" engine but if you intend to keep the car, it is definitely better to thoroughly rebuild the engine you already have. That way, at start up, you don’t have to deal with the uncertainties and headaches that accompany used parts and it will be easy to fine tune the engine and obtain good results right away. If you would like to schedule the noise diagnostic please set it up with YourMechanic.

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: Should I get the piston rings replaced or just swap the entire engine?

First off, if it isn't smoking, it probably isn't burning all that oil. A quart a week is four quarts a month and about 1000-2000 miles. That's a lot of oil. It is most likely a combination of leaking oil...

Q: Automatic transmission problem

Hi, thanks for writing in. This is likely related to the transmission control module which directs the transmission to shift up and down at specific points relative to engine RPMs. If you would like, consider having an expert automotive technician...

Q: Knocking/fluttering in rear end

Hi and thanks for contacting YourMechanic. If you have a limited slip differential, then having 2 different size tires on the axle will cause the limited slip differential to make this noise. Eventually, the limited slip will stop working and...

Related articles

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...
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...