2004 Cadillac SRX persisting noise

Tiny
ELDOMI809
  • MEMBER
  • 2004 CADILLAC SRX
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 65,880 MILES
Hey, there seems to b a weird almost like a bell ringing noise in the front of the engine me and my mechanic thought it was a pulley or belt and we took the belts off and it continued. Does anyone have any idea?
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Saturday, August 8th, 2009 AT 8:34 PM

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Tiny
OBXAUTOMEDIC
  • EXPERT
Hello,

It has been quite a while since I have heard your problem, and I am not sure that this is the problem. But, last time someone complained of a bell ringing it was many years ago and it was the Crank Shaft Pulley/Harmonic Balancer.

Another possibility is the timing chain.

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Saturday, August 8th, 2009 AT 9:58 PM
Tiny
ELDOMI809
  • MEMBER
Oh, so the whole crankshaft would have to b replaced, or can the pulley at the beginning b replaced?(Im kindah of a newbie wen it comes to engine internals)
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Sunday, August 9th, 2009 AT 1:38 PM
Tiny
OBXAUTOMEDIC
  • EXPERT
No, just the Pulley would need to be replaced.

Not the whole Crank Shaft. That would cost you a fortune.

Replacing the Crank Pulley would be the cheaper way to go but like I said it is also possible that it is the Timing Chain.

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Sunday, August 9th, 2009 AT 8:15 PM
Tiny
ELDOMI809
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Ill have to get that checked out. Do you know if the cat in the exhaust goes quickly on this vehicle, bcuz it also makes a noise as if it was misfiring or it had sum type of escape that causes shaking @ times
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Sunday, August 9th, 2009 AT 9:19 PM
Tiny
OBXAUTOMEDIC
  • EXPERT
Ok you say it causes shaking what shakes the exhaust or the whole car? If just the exhaust could be that something has broke loose inside the cat or you may have a hole in it. You would need to get under the car to find out more.

Causes of Catalytic Converter Failure

There are two ways a converter can fail:

It can become clogged.
It can become poisoned.

There really is no "inspection port" for the consumer or mechanic to see an actual clog in a converter. Often, the only way to tell if a catalytic converter is malfunctioning (plugged) is to remove it and check the change in engine performance. When a clogged converter is suspected, some mechanics temporarily remove the O2 sensor from the exhaust pipe ahead of the catalytic converter and look for a change in performance.

A catalytic converter relies on receiving the proper mix of exhaust gases at the proper temperature. Any additives or malfunctions that cause the mixture or the temperature of the exhaust gases to change reduce the effectiveness and life of the catalytic converter. Leaded gasoline and the over-use of certain fuel additives can shorten the life of a catalytic converter.

A catalytic converter can also fail because of:

Bad exhaust valves on the engine
Fouled plugs causing unburned fuel to overheat the converter
Sometimes you can tell that a converter is clogged because you don't go any faster when you push the gas pedal. Also, there usually is a noticeable drop in gas mileage associated with a clogged catalytic converter. A partially clogged converter often acts like an engine governor, limiting the actual RPMs to a fast idle. A totally clogged converter causes the engine to quit after a few minutes because of all the increased exhaust back pressure.

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Monday, August 10th, 2009 AT 9:47 PM

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