devousivac
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- Twin Cities, MN
OK. I'm going crazy not being able to figure out what's making this noise. Here's the story:
1) Driver alternator was bad. Volt regulator was going out.
2) I go to Autozone and get a new driver's side alt (DL 7157) and switch the pulley out to account for the difference in size
3) I replace every belt. Both alts and the power steering belt, 3 total, but you already knew that.
4) chirp. chirp chirp chirp. (Note that this sound was not present when I was running it with the old alternator.)
So I hear this chirp and I assume one of the belts is too loose even though it sounds too metallic to be a belt whine. Not the case. All the belts are tight and good. I run it again. Chirp. Chirp. Chirp. Then I assume that I bought an alternator from Autozone with some bad bearings, so I bring it back and exchange it for another. I install that one. Chirp. Chirp Chirp.
Through a very scientific process of elimination that I made up myself, I make the assumption that neither of the new Autozone alternators were bad as the M1009 makes the sound regardless of which new Autozone alternator is in there.
To be certain the bearings aren't going out in the passenger side alternator, I disconnect the belt on the passenger side alt and run it only on the driver's side alt. Chirp. Chirp Chirp.
So then I disconnect the belt on the driver's side alt and run it on the passenger side alt, to see if its coming from the power steering. No chirp - only the obnoxiously loud noise of my manly diesel engine. What does this mean if there is a chirp ONLY when the driver's side alt belt is connected, chirping with either of two new alts?? I can understand getting one bad lemon, but what are the chances of getting two bad lemons (Autozone alts) in a row??
I don't know what to make of this. My powers of deduction obviously are poor as I have made the below theories and somewhere they are contradictory. Any help would be greatly appreciated.
Here are my theories. The chirping is NOT caused by:
1) Either of the brand new Autozone alternators as two alternators fresh from the store made the sound (yes. I do know that Mike at OD Iron sells better versions of these and that I should just go there. I didn't and I'm trying to clean up my act. Thank you.)
2) The passenger side alternator, as when the truck runs off just the passenger side alternator, the chirping is not present.
3) The power steering pump bearings, as when passenger alt and power steering belt are connected, there is no chirp.
4) Sparrows, as I have single-handidly slaughtered everything with wings in a twenty mile radius to eliminate any possibilities of fluke chirping.
1) Driver alternator was bad. Volt regulator was going out.
2) I go to Autozone and get a new driver's side alt (DL 7157) and switch the pulley out to account for the difference in size
3) I replace every belt. Both alts and the power steering belt, 3 total, but you already knew that.
4) chirp. chirp chirp chirp. (Note that this sound was not present when I was running it with the old alternator.)
So I hear this chirp and I assume one of the belts is too loose even though it sounds too metallic to be a belt whine. Not the case. All the belts are tight and good. I run it again. Chirp. Chirp. Chirp. Then I assume that I bought an alternator from Autozone with some bad bearings, so I bring it back and exchange it for another. I install that one. Chirp. Chirp Chirp.
Through a very scientific process of elimination that I made up myself, I make the assumption that neither of the new Autozone alternators were bad as the M1009 makes the sound regardless of which new Autozone alternator is in there.
To be certain the bearings aren't going out in the passenger side alternator, I disconnect the belt on the passenger side alt and run it only on the driver's side alt. Chirp. Chirp Chirp.
So then I disconnect the belt on the driver's side alt and run it on the passenger side alt, to see if its coming from the power steering. No chirp - only the obnoxiously loud noise of my manly diesel engine. What does this mean if there is a chirp ONLY when the driver's side alt belt is connected, chirping with either of two new alts?? I can understand getting one bad lemon, but what are the chances of getting two bad lemons (Autozone alts) in a row??
I don't know what to make of this. My powers of deduction obviously are poor as I have made the below theories and somewhere they are contradictory. Any help would be greatly appreciated.
Here are my theories. The chirping is NOT caused by:
1) Either of the brand new Autozone alternators as two alternators fresh from the store made the sound (yes. I do know that Mike at OD Iron sells better versions of these and that I should just go there. I didn't and I'm trying to clean up my act. Thank you.)
2) The passenger side alternator, as when the truck runs off just the passenger side alternator, the chirping is not present.
3) The power steering pump bearings, as when passenger alt and power steering belt are connected, there is no chirp.
4) Sparrows, as I have single-handidly slaughtered everything with wings in a twenty mile radius to eliminate any possibilities of fluke chirping.
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