Forte's

Visit our community sponsor

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 4 of 4

Thread: Hot Alternator - Why?

  1. 10-15-2017, 07:52 AM #1
    DadofThree
    DadofThree is offline
    Senior Member
    Join Date
    Oct 2012
    Location
    Tybee Island, GA
    Posts
    505
    Post Thanks / Like

    Hot Alternator - Why?

    I noticed yesterday that my Alternator was hot while trying to crank my car. What is this a sign of? It's not normal is it.

    Dave
    Mk 3.1 - #6882 - 5.0L 302 - FiTech EFI - 3-Link - 3.08 Ratio - 15" Wheels
    Greenhorn and doing the best I can
    My photos are at: My Flickr acct
    Videos are at: YouTube Videos
    Reply With Quote Reply With Quote
  2. 10-15-2017, 08:38 AM #2
    Jeff Kleiner
    Jeff Kleiner is offline
    Not a waxer Jeff Kleiner's Avatar
    Join Date
    Feb 2011
    Location
    Bloomington, Indiana
    Posts
    8,067
    Post Thanks / Like
    Notwithstanding a wiring error a warm alternator when not running is typically indicative of a bad diode in the internal rectifier bridge.

    Jeff

    PS---Please disconnect the battery until you have corrected the problem.
    Mk3 #5946 Build Pics, last updated 6/2008

    Mk4 #7276 "indy14" Build Thread

    Mk4 Bodywork Thread
    Reply With Quote Reply With Quote
  3. 10-16-2017, 02:36 PM #3
    AC Bill
    AC Bill is offline
    Senior Member AC Bill's Avatar
    Join Date
    Feb 2011
    Location
    Vancouver Island BC Canada
    Posts
    1,878
    Post Thanks / Like
    So Jeff, you mention "not running", but would that also happen when the ignition is just turned on?

    I have heard of certain older Ford alternators shorting internally, even when the car was parked, ignition off. There was a serious potential for a fire, if there was no fuse used.
    Reply With Quote Reply With Quote
  4. 10-16-2017, 03:08 PM #4
    CDXXVII
    CDXXVII is offline
    Senior Member CDXXVII's Avatar
    Join Date
    Feb 2011
    Location
    Santa Clarita, CA.
    Posts
    757
    Post Thanks / Like
    If I have the ignition on without the engine running the alternator will get warm after a few minutes.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Martin's Dent and Collision Shop

Visit our community sponsor