Thread: Help! Please! Odd Noise...grinding/churning?
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Old 11-11-2011, 10:18 AM
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onehundred80
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Default Re: Help! Please! Odd Noise...grinding/churning?
Originally Posted by jamesknox
Yes, I am going to certainly do that first. Should the idler pulley be OEM or is it fine to use an aftermarket one?
You can find out which part is at fault just by removing the serpentine belt and rotating the pulleys by hand, shake them around a little as well. See if there is any harshness in the rotation.

If the OEM pump is a Bosch it will have the Mercedes part number and the Bosch number stamped on it. If you buy the Bosch pump in a Bosch box it will have the Bosch number stamped on it.
You have to ask yourself if the Mercedes number is worth $600. I know what my answer is.

Find out what's wrong before you spend a penny.

 
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