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Re: very loud noise - they told me is the front...
I once had a similar problem!
My engine was making a tap tap tap noise and it was getting louder.
I discovered I was way out of oil but when I changed and added oil the noise went away and never came back.
If you took it in because of the noise and the noise is gone I won't do anything!
Make sure to keep a good eye on your oil !
I'm reminded of the old adage 'If it ain't broke, don't fix it!'
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Difficult to say.
Chances are all of the valves and lifters along with the cam bearings have been damaged due to lack of oil. To what degree of damage or excessive wear is difficult to say.
You might be able to remove the lifters and examine them but it might make more sense to replace all of them to be sure.
Expect more noise as time goes on from the cam.
The ticking is probably a damaged lifter, hard to say exactly without hearing it.
If you hired a qualified automotive shop to do your oil change and they didn't put enough oil in your vehicle they would have some liability. Your paper work should state the amount of oil put in the engine. Cross reference that with your manual
This noise can be caused by a defective outboard (wheel end) front axle constant velocity joint (known as a "CV" Joint). This would be louder on turns, more noticeable at lower speeds and sharp turns. Next it could be valve train noise, this would come from the top of the engine and this could be related to the oil change if a piece of dirt got into the oil supply to the hydraulic camshaft followers. At this point you need a professional to listen to the noise to determine the exact cause.
u joints dont make a whine type noise. could it be tires? rotate tires and see if noise changes. did he hear the noise with the truck in the air? could be the front diff. with a 2006 explorer I would not have put the old bearing back in, its going to need it anyhow, sooner or later.
Did you try topping it off with oil and seeing if the noise goes away? If so, it sounds like you may have some internal engine damage, and without taking it apart, it is difficult to say exactly what is wrong without listening to it myself. I would say it's probably time for an engine rebuild if the oil doesn't clear this tapping sound up.
I believe your carrs makes the noise when in motion. hence it is important to identify the place from where the noise is heard. if it is from the fron please use a jack and life up your car. check the rotation of the wheels,if noisy then check on the wheel bearings, brake linings, pads, discs. opne and confirm check the front suspension for damage to the links, the shock absorbers,the bushes that support the arms, and for any chassis damage that is scrapping against the tyres. Do the same for the rear side. Please also try to press down the car for any squeaking. locate the noise and change the part which could be as above. However is you think that the noise is coming from the gear box/ differencial, then it might pose a bigger problem, it could be low oil in your gear box, failure of the counter wheels, the gear drives or shafts. if is important to run the drive while in jack. I hope you get this helps. Good day. .
It looks like you drove your car with no oil in your engine, unfortunately you should have stopped the moment you started to hear the "rapping noise" since you could have severely damaged your engine. If the noise continues even if you have a normal oil reading you most likely would have to overhaul your engine since by driving it oil dry several parts may have resulted damaged.