Nay-Sayer Posted October 9, 2009 Share Posted October 9, 2009 I have a loud whining sound coming from under the hood of my 1993 Pathfinder. The whining sound mainly occurs when the truck is cold. After it's had a chance to heat up, the whining sound goes away. Any ideas? Link to comment Share on other sites More sharing options...
Terrano1992 Posted October 9, 2009 Share Posted October 9, 2009 AC belt tensioner or alternator bearings are most frequent sources of whine... Link to comment Share on other sites More sharing options...
Nay-Sayer Posted October 9, 2009 Author Share Posted October 9, 2009 AC belt tensioner or alternator bearings are most frequent sources of whine... I was thinking it was the belt tensioner also. Is this an expensive fix? Thanks... Link to comment Share on other sites More sharing options...
Precise1 Posted October 10, 2009 Share Posted October 10, 2009 Do you have a wife or GF stuffed under the hood?? Just checking... The tensioner pully (AC?) is a source of noise but wonder why by the name?? It is not expensive, IIRC you can disassemble the unit and just replace the bearing pack. To check if it is that unit, start the truck and then spray some WD-40 or silicone spray into it to see if it quiets down for a bit. Be careful of the moving belts, spinning fan and general overspray though... Can't hurt to check the For Sale section, or post in the 'Parts Wanted' B Link to comment Share on other sites More sharing options...
adamzan Posted October 13, 2009 Share Posted October 13, 2009 Get a new one for around 20 bucks, if you need it. http://www.rockauto.com/catalog/raframecat...p;parttype=6956 Link to comment Share on other sites More sharing options...
GrimGreg Posted October 13, 2009 Share Posted October 13, 2009 Mine (AC tensioner) started squealing 2 years ago, I hit it with some PB Blaster and haven't heard a peep since. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now