Hi guys just finished replacing my oil fill tube and now have a whine
03-10-2017, 08:57 PM
#1
Instructor
Thread Starter
Hi guys just finished replacing my oil fill tube and now have a whine
Had to take out the alternator, the belt off etc to get the tube in and after buttoning up everything today I have a whine under load? Alternator? Belt has to wear in? Need belt dressing? Thank you.
Update and solution...
Ended up driving the car to an alternator specialist and they diagnosed the issue in about 10 seconds after hearing the noise. According to the tech the alternator clutch pulley has a life expectancy of 60K miles and my car has 111K on it. The whine was very quiet at idle and got louder with higher rpm's. Alternator was original to the car.
I went home and pulled the alternator again, thankfully only took about 30 minutes this time, and brought it to the shop. My pulley would free spin and not "clutch" up when rotating in back and forth. It had zero resistance when spinning it. Not real sure what normal is. Not sure if it was on its way out or got goobered up during removal, but I now have a new alternator and I replaced the idler pulley as well. FYI the new Porsche idler pulley is plastic. Glad I got this resolved, it was a major pain but I did learn a lot in the process.
Update and solution...
Ended up driving the car to an alternator specialist and they diagnosed the issue in about 10 seconds after hearing the noise. According to the tech the alternator clutch pulley has a life expectancy of 60K miles and my car has 111K on it. The whine was very quiet at idle and got louder with higher rpm's. Alternator was original to the car.
I went home and pulled the alternator again, thankfully only took about 30 minutes this time, and brought it to the shop. My pulley would free spin and not "clutch" up when rotating in back and forth. It had zero resistance when spinning it. Not real sure what normal is. Not sure if it was on its way out or got goobered up during removal, but I now have a new alternator and I replaced the idler pulley as well. FYI the new Porsche idler pulley is plastic. Glad I got this resolved, it was a major pain but I did learn a lot in the process.
Last edited by AzDropTop; 03-14-2017 at 12:41 PM. Reason: update to post...
03-10-2017, 09:27 PM
#3
Instructor
Thread Starter
Thanks for the reply...looks like there is plenty of clearance between them. Almost sounds like alternator whine? Definitely wasn't there prior to my poking around back there.
03-11-2017, 09:50 AM
#4
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Check the idler pulley you had to remove to take out the alternator. It could be that. You can use a long screwdriver as a make-shift stethoscope to listen to the pulley and alternator for bearing whine. Be very careful doing that with the engine running.
03-11-2017, 11:06 AM
#5
Race Director
Did you install the belt correctly?
This includes being sure it is installed to run in the same direction as it was before.
Did the belt have any sharp edges? This can be a sign the belt is not tracking correctly and this can be due to an accessory drive that has excessive bearing/shaft play.
03-11-2017, 01:42 PM
#6
Instructor
Thread Starter
Did you install the alternator correctly?
Did you install the belt correctly?
This includes being sure it is installed to run in the same direction as it was before.
Did the belt have any sharp edges? This can be a sign the belt is not tracking correctly and this can be due to an accessory drive that has excessive bearing/shaft play.
Did you install the belt correctly?
This includes being sure it is installed to run in the same direction as it was before.
Did the belt have any sharp edges? This can be a sign the belt is not tracking correctly and this can be due to an accessory drive that has excessive bearing/shaft play.
Thanks very much!!!
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03-11-2017, 01:54 PM
#8
Instructor
Thread Starter
03-11-2017, 02:10 PM
#9
Rennlist Member
The belt rotation check is a good tip. However, all I can think about is all that advice in your alternator removal thread about hitting the thing hard with a hammer!
03-11-2017, 02:15 PM
#10
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03-11-2017, 10:58 PM
#11
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Did my oil filler tube recently. Everything worked fine for the first couple miles then the regulator went out on the alternator. With almost 80K on the car and 15 years I am guessing the alternator didn't like being banged around while getting it out.
Maybe just removing and re-installing caused it to act up?
Maybe just removing and re-installing caused it to act up?
03-11-2017, 11:05 PM
#12
Instructor
Thread Starter
Did my oil filler tube recently. Everything worked fine for the first couple miles then the regulator went out on the alternator. With almost 80K on the car and 15 years I am guessing the alternator didn't like being banged around while getting it out.
Maybe just removing and re-installing caused it to act up?
Maybe just removing and re-installing caused it to act up?
03-12-2017, 12:11 AM
#13
Rennlist Member
Have you pulled the belt and check all the pulleys. I'd bet a bearing is on its way out at 111K miles..
03-12-2017, 12:17 AM
#14
Instructor
Thread Starter
03-12-2017, 07:40 AM
#15
Rennlist Member
, however for what they charge, each coffee should come with a "happy ending".Personally, while DIY can drive you crazy, to me it's also one of the joys. I like getting my hands dirty, understanding how things work and being as independent as possible. I've owned, road, and raced motorcycles all my life and can honestly say the last time any of my bikes saw a dealer's service department was 1985 and that was due to a warrantied dropped valve.