Originally Posted by patelE60
I've bit of situation which is driving me crazy..hope someone can help or give advise.
So my car died in shopping plaza and had it towed to Indy shop.
got new IBS Cable, alternator and starter replaced..picked up car and now some type of whistling/whinnying noise is coming from engine..revs up n down as rpm goes up and down. if i go above 40mph+ no noise...maybe there is noise but i cant hear it.
opened up hood and i can hear it from alternator area..
could it be new alternator? Idler pully? tension pully?
also can feel that car is not smooth as it used to be...revs up little too much like its in 1st gear..rpm stays about 800...feels like little lower can be smoother.
should i hold indy shop responsible for this or this is whole new issues?
any input and advise would be greatly appreciated.
Definitely hold the shop responsible for the noise. Hold their feet to the fire.
Have you been to this shop before and do you trust them? Did they detail what they have found on the repair ticket that caused them to replace these components (example: Alternator output ranges from 12.5V to 13.5V during operation)?
At first glance, without knowing all of the details, I would also be inclined to hold them responsible for churning (replacing parts that are good for additional profit), as it is extremely doubtful that all three of those components went bad simultaneously. But of course you can't begin that discussion until they have first corrected the whistling problem.
Tip for the future: When you drop the car off for repair ALWAYS tell them UPFRONT that you want all of the old parts that were replaced. And when you pickup the car, don't leave until you get them. This is a start towards keeping a shop honest. They can still give you someone else's failed alternator even if yours was good, but at least they know they had better be careful.
Failure of the IBS (typical in the first three years for the E60 due to moisture impregnation which causes the IBS to repeatedly wake up the DME while the car is at rest and run down the battery) could have been the cause of the low battery. However, I would question how long it took them to turn the repair around. IBS failures can be intermittent and identifying them conclusively usually requires either measuring closed circuit current over a period of a day, with and without the IBS attached, or operating the vehicle over time without the IBS connected to discover that the battery no longer runs down. If a physical examination or electrical test exists to determine an IBS is bad I am not aware of it. If the car was in and out of the shop quickly they likely replaced the IBS whether it was bad or not.
Or failure of the alternator could have caused a low battery. They should have documented the alternator voltage output on the repair ticket. After running 15 seconds the alternator output would normally be in the 14.1V to 14.6V range.
Or a failing starter could have caused long cranking, and that coupled with short trips could run a less than perfectly health battery down. But if you had no cranking problems before, why was the starter replaced?
It might even be the case that the Indy discovered the IBS to be bad, and he also discovered the voltage regulator failing on the alternator so both were replaced. But the starter?
Your description of the whistling is sort of unusual. Belt and pulley problems are the most common problems after any belt driven component is replaced or reinstalled. Rubbing belt noise or pulley bearing noise is commonly described as squealing.
The serpentine belt which drives the alternator expects all pulleys and tensioners to be in pretty much a straight line. Any large deviation causes the belt to be pulled out of line and causes it to rub on the edge of the out-of-alignment pulley as well as pulleys before and after it. One cause could be the alternator not seated properly against its holding bracket, which would throw it out of line.
Or the noise could be in the bearing of either a unit being driven (alternator, water pump, power steering pump) or one of the idler or tensioner pulleys, especially on a 2004 as the tensioners are reaching the end of their life.
Also, given the whistling noise, they should check to make sure the air intake system ducting has been reinstalled properly. The whistling noise could be air being sucked through a gap in one of the intake ducts that is not fitted properly.