Motor running rough & grinding noise - dealer stumped!
#61
#62
#63
I'm always up for a road trip.
#64
Cheers,
The following users liked this post:
jahummer (01-12-2012)
#65
#66
Cheers,
#67
#68
I'm going to say no in this case, because this procedure addresses a vibration or drone noise noticeable at road speed, generally 45-55 MPH, and sometimes as high as 70-72 MPH. As I recall, you have noticed something abnormal sitting still, as well as when moving.
Cheers,
Cheers,
#69
No doubt it is getting frustrating. As mentioned before, I am taking the car to a local Jag tech to see what he thinks about the compressor.
#70
If it only happens when you turn the compressor on, then it's probably the bearings in the pulley. They're likely going out. The engine will bog down and struggle for a moment as it tries to get the pulley to begin turning at speed, because the bearings are cracked/flat/shattered. Those bad bearings are creating the grinding noise you're hearing.
This is mostly a guess, but a guess born of experience. Father-in-law's Ford had the exact same symptoms and issues and ultimately, the solution presented above.
This is mostly a guess, but a guess born of experience. Father-in-law's Ford had the exact same symptoms and issues and ultimately, the solution presented above.
#72
UPDATE...things have changed
Well, at least for today, some things have changed.
The noise I have been hearing is kind of like a chugging/hammering, loud enough to be heard clearly but not what I would consider to be a loud noise.
Today I noted the noise now persists whether the AC is on or off, but again only when stopped in drive. And to top it off the vibration increases when turning the steering wheel in either direction along with a creaking noise.
Again none of this happens when in neutral.
The vibration is strong enough to be felt in the wheel, seat, mirrors and rattle keys in the door, FWIW.
The noise I have been hearing is kind of like a chugging/hammering, loud enough to be heard clearly but not what I would consider to be a loud noise.
Today I noted the noise now persists whether the AC is on or off, but again only when stopped in drive. And to top it off the vibration increases when turning the steering wheel in either direction along with a creaking noise.
Again none of this happens when in neutral.
The vibration is strong enough to be felt in the wheel, seat, mirrors and rattle keys in the door, FWIW.
#73
And to top it off the vibration increases when turning the steering wheel in either direction along with a creaking noise.
#74
But the vibration goes away in neutral. It didn't do this with the steering before and it still does it even if I am not turning the wheel in drive if the AC is on. Again this is all a recent development. Never had the vibration before, other XJ at dealer had no vibration.
Anyhow the point of my last post was this:
Noise is present even with AC off so perhaps AC is not the issue
Steering is now making creaking noises and contributing to the vibration
Better description of noise and vibration
I understand about the load but RPMs do not increase and if I press the gas pedal, nothing changes.
Hope my updates help with additional suggestions.
Anyhow the point of my last post was this:
Noise is present even with AC off so perhaps AC is not the issue
Steering is now making creaking noises and contributing to the vibration
Better description of noise and vibration
I understand about the load but RPMs do not increase and if I press the gas pedal, nothing changes.
Hope my updates help with additional suggestions.
#75
But the vibration goes away in neutral. It didn't do this with the steering before and it still does it even if I am not turning the wheel in drive if the AC is on. Again this is all a recent development. Never had the vibration before, other XJ at dealer had no vibration.
Anyhow the point of my last post was this:
Noise is present even with AC off so perhaps AC is not the issue
Steering is now making creaking noises and contributing to the vibration
Better description of noise and vibration
I understand about the load but RPMs do not increase and if I press the gas pedal, nothing changes.
Hope my updates help with additional suggestions.
Anyhow the point of my last post was this:
Noise is present even with AC off so perhaps AC is not the issue
Steering is now making creaking noises and contributing to the vibration
Better description of noise and vibration
I understand about the load but RPMs do not increase and if I press the gas pedal, nothing changes.
Hope my updates help with additional suggestions.
Good luck!
#76
#78
#79
Brutal,
And I thought I was a cynic! You & SuperTrav I can learn from! I won’t even comment about the myriad of codes except to say to the issuer “and your point is”? See, I can be gentle on dealers.
My first reaction was the compressor, either about to **** itself internally, or the magnetic clutch bearing is ‘kaput’. But jahummer’s observation about vibration coming from the rear of the engine is a bit of a curved ball.
I have a ‘mechanics’ stethoscope that I have had for years (it has a long aluminium rod attached to the diaphragm) which is very good for tracking down the source of a noise. I don’t know if you can still buy them, but maybe you could ‘scrounge’ an old one from someone in your family, and modify it. An alternative, jahummer, is to use a long handled screwdriver with the handle against your ear, and see if you can locate the source of the noise that way. You just put the blade on the component area you are checking, and it will transfer to sound to your ear. Just be careful around moving parts, or the screwdriver may end up sticking through your upholstery!
Cheers,
Languid
And I thought I was a cynic! You & SuperTrav I can learn from! I won’t even comment about the myriad of codes except to say to the issuer “and your point is”? See, I can be gentle on dealers.
My first reaction was the compressor, either about to **** itself internally, or the magnetic clutch bearing is ‘kaput’. But jahummer’s observation about vibration coming from the rear of the engine is a bit of a curved ball.
I have a ‘mechanics’ stethoscope that I have had for years (it has a long aluminium rod attached to the diaphragm) which is very good for tracking down the source of a noise. I don’t know if you can still buy them, but maybe you could ‘scrounge’ an old one from someone in your family, and modify it. An alternative, jahummer, is to use a long handled screwdriver with the handle against your ear, and see if you can locate the source of the noise that way. You just put the blade on the component area you are checking, and it will transfer to sound to your ear. Just be careful around moving parts, or the screwdriver may end up sticking through your upholstery!
Cheers,
Languid
The following users liked this post:
jahummer (01-22-2012)
#80
That's : Ghetto USA. 30817
Learning a lot catching up on this thread however, not sure exactly what but I'm still reading.
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