Page 1 of 2 12 LastLast
Results 1 to 20 of 22

Thread: Alternator help - please.

Discuss the Austin Healey Sprite and the MG Midget. Two different but similar cars sometimes referred to collectively as the Spridget.

  1. #1
    Great Pumpkin JPSmit's Avatar
    Join Date
    Nov 2004
    Location
    Toronto, ON
    Posts
    18,711
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    57
    Thanked in
    54 Posts

    Alternator help - please.

    Well friends, I need some help. Ms Triss has been off the road for about a month with a strange noise. I presumed it was the water pump so, finally put it together and the noise didn't go away. Took the fan belt off and the noise immediately went away. So, presumably the only other thing is the alternator.

    Now the shrewder among you will recall clearly that 12 years ago when I was putting the engine back in that I went with a Delco alternator. Who among you remembers what car it originally came off of? (I seem to recall 90's V6). One thing I did notice as I was removing the alternator was that it wasn't perfectly parallel to the other pulleys. It was in line for the belt but twisted ever so slightly toward the engine as the belt pulled it.

    So, I have added some video - the noise is regular but random - mostly when I accelerate. It sound more like sheet metal than solid internal metal.

    Any thoughts? alternators are cheap enough, so if it is cooked, no problem, and if a new one, any suggestions? OTOH am I missing something? (the vanes don't appear to be touching)

    help?

    IMG_2779.jpg

    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

  2. #2
    Yoda dklawson's Avatar
    Join Date
    Mar 2005
    Location
    Durham, North Carolina, USA
    Posts
    6,180
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    44
    Thanked in
    41 Posts

    Re: Alternator help - please.

    I don't recognize the sound. I understand that the water pump is new but have you tried a "screwdriver stethoscope" to confirm it's the alternator and not somewhere else?

    The alternator appears to be a Delco 10SI. Rather than repeat what you and others probably already know I'll just post a link to a webpage about them. (Used in many GM cars... just about any 1970s/1980s Camaro, Impala, etc. )
    http://www.madelectrical.com/electri...elcoremy.shtml

    The 10SI was once very common and rebuilt units would be at the local parts store. Today you may need to have one ordered if you want a replacement.
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

  3. #3
    Jedi Warrior SD Bugeye's Avatar
    Join Date
    Jan 2015
    Location
    South Dakota
    Posts
    614
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Alternator help - please.

    Take the belt off see if it persists
    Door handles,Bootlid,Glovebox all fads
    59 sprite

  4. #4
    Great Pumpkin JPSmit's Avatar
    Join Date
    Nov 2004
    Location
    Toronto, ON
    Posts
    18,711
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    57
    Thanked in
    54 Posts

    Re: Alternator help - please.

    Quote Originally Posted by SD Bugeye View Post
    Take the belt off see if it persists
    did. noise went away immediately. took the alternator to a shop today. he could find nothing wrong. so it may be an alignment issue it may be a harmonic. Went to try to get a new bracket at Canadian tire tonight - kid didn't even know what a bracket was (or an alternator for that matter) so no help there. Decided to do the next job and pull the switches off the steering column and soak them for a while in citric acid.

    then the last job - replace the rear drivers spring (easier than loosing weight he thought to himself) I had bought a new used one (really is almost new) got the bushings, jacked up the car and noticed the oil dripping off the shock. hmmm. (can you bench test a lever shock?)

    Pulled off the spring,. started removing the shackle thing at the end and - knowing full well that I was going to do it mind you - sheered off the nut. So I think there is a road trip tomorrow. sheesh.
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

  5. #5
    Jedi Warrior SD Bugeye's Avatar
    Join Date
    Jan 2015
    Location
    South Dakota
    Posts
    614
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Alternator help - please.

    I would check the thermostat
    no wait just get a new one
    Door handles,Bootlid,Glovebox all fads
    59 sprite

  6. #6
    Great Pumpkin JPSmit's Avatar
    Join Date
    Nov 2004
    Location
    Toronto, ON
    Posts
    18,711
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    57
    Thanked in
    54 Posts

    Re: Alternator help - please.

    Quote Originally Posted by SD Bugeye View Post
    I would check the thermostat
    no wait just get a new one
    OK, why? (genuine question - is there a connection?)
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

  7. #7
    Jedi Warrior SD Bugeye's Avatar
    Join Date
    Jan 2015
    Location
    South Dakota
    Posts
    614
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Alternator help - please.

    I had a 302 that would make a wierd slapping noise similar to what I’m hearing in your recording
    it was the thermostat
    busted and when you would rev it it would make a slapping noise and zinging noise as water would rush through it.
    Door handles,Bootlid,Glovebox all fads
    59 sprite

  8. #8
    Great Pumpkin JPSmit's Avatar
    Join Date
    Nov 2004
    Location
    Toronto, ON
    Posts
    18,711
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    57
    Thanked in
    54 Posts

    Re: Alternator help - please.

    Quote Originally Posted by SD Bugeye View Post
    I had a 302 that would make a wierd slapping noise similar to what Iím hearing in your recording
    it was the thermostat
    busted and when you would rev it it would make a slapping noise and zinging noise as water would rush through it.
    Interesting - who would have thunk it, will take a look
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

  9. #9
    Yoda
    Join Date
    Dec 2008
    Location
    South Dakota
    Posts
    3,928
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Alternator help - please.

    Do you still have a fan clutch? They are notorious for failing. I you are removing the belt the pump and fan wouldn't be turning would it?

    Kurt
    65,66 Midget
    57 Berkeley, MGA
    Working on quality rather than quantity

  10. #10
    Great Pumpkin JPSmit's Avatar
    Join Date
    Nov 2004
    Location
    Toronto, ON
    Posts
    18,711
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    57
    Thanked in
    54 Posts

    Re: Alternator help - please.

    Quote Originally Posted by nomad View Post
    Do you still have a fan clutch? They are notorious for failing. I you are removing the belt the pump and fan wouldn't be turning would it?

    Kurt
    do still have a fan clutch - how might I diagnose it?
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

  11. #11
    Jedi Knight
    Join Date
    Dec 2008
    Location
    Calgary, Alberta, Canada
    Posts
    950
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Alternator help - please.

    The genertor on our BJ7 appears to be very unhappy, particularly when first starting it up. Diagnosis was the traditional approach of holding a long screw driver to my ear, and then putting the blade on various potential points (dynamo, block adjacent to water pump, etc. etc.). Sure lots of mechanical noises, but also sure looks like the 'dynamo'. The car is tucked away for the winter and I'll worry about replacing it/rebuilding it come Spring, as it'll be warm a month before I really want to get it out on the roads (waiting for the City guys to have a chance to clean the sand and gravel off). Similar timing for the motorcycle. Doug
    1959 pristine 948 cc Bug-Eye; DCOE, 5 speed; bought 1971
    1960 BE bought 1971 & stored since; body tub restored and reassembling (1275; etc.)
    1962 AH 3000 BJ7; 3rd owner (1982?); in shop Oct. 2015 for paint job - home soon!
    1962 VW Meyers Manx clone dune buggy; stripped last winter and being reassembled
    1969 Kawasaki 500 H1 Triple, orig. owner; stored since 1973, but runs again! 1999 Buell S3

  12. #12
    Yoda
    Join Date
    Dec 2008
    Location
    South Dakota
    Posts
    3,928
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Alternator help - please.

    Quote Originally Posted by JPSmit View Post
    do still have a fan clutch - how might I diagnose it?
    I guess first I would see if there is any play in it but the only way to be sure would be to remove the fan and clutch. Maybe just removing the fan would stop it from making the noise and that would be a pretty good indication of the problem. Your vid sure sounded like something a bad fan clutch would do.

    Kurt
    65,66 Midget
    57 Berkeley, MGA
    Working on quality rather than quantity

  13. #13
    Great Pumpkin JPSmit's Avatar
    Join Date
    Nov 2004
    Location
    Toronto, ON
    Posts
    18,711
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    57
    Thanked in
    54 Posts

    Re: Alternator help - please.

    Quote Originally Posted by nomad View Post
    I guess first I would see if there is any play in it but the only way to be sure would be to remove the fan and clutch. Maybe just removing the fan would stop it from making the noise and that would be a pretty good indication of the problem. Your vid sure sounded like something a bad fan clutch would do.

    Kurt
    I will say that the old clutch got pressed on to the new water pump - so I could have transferred the problem
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

  14. #14
    Great Pumpkin JPSmit's Avatar
    Join Date
    Nov 2004
    Location
    Toronto, ON
    Posts
    18,711
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    57
    Thanked in
    54 Posts

    Re: Alternator help - please.

    well friends, I am stumped. I got the engine back together, and nothing has changed.

    To recap, it still makes the noise.

    It did go away when the fan belt was off.
    I have a new system for holding on the alternator and it is straight.
    I had the stethoscope on it and the alternator doesn't seem to be it.
    I find that the closer I get to the fan the quieter it gets and the further (on the water pump housing) the noisier it gets.
    (Remember I did change the water pump)

    When I rev the engine it seems to "push through" the sound and at higher revs I don't hear it - remember, it comes and goes.

    I took it for a test drive and it is definitely there, and, troublingly, I can feel it in the clutch.

    So, could it be something as ominous as the thrust washers?

    I am open to any and all ideas right now.
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

  15. #15
    Yoda Jim_Gruber's Avatar
    Join Date
    Dec 2006
    Location
    Apollo Beach, FL
    Posts
    5,474
    Blog Entries
    2
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Alternator help - please.

    If you’ve got a 1500 under the bonnet that could be it. A BF Screwdriver to see movement on the harmonic balancer might be in order.
    Jim Gruber - Apollo Beach, FL
    Bugsy I - '68 Sprite w BE Bonnet - Gone but not forgotten
    Bugsy IV - '60 Bugeye - 1,275+.040 and a 5-Speed - CA Car - 2nd Owner from new - 10/12 Painting done, reassembly, cutting, and buffing in progress.

  16. #16
    Yoda
    Join Date
    Dec 2008
    Location
    South Dakota
    Posts
    3,928
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Alternator help - please.

    Just got around to listening to the vid. Could the fan on the alternator be loose? I believe that they are held in place just by tightening the nut and nothing else. Sounds like that or perhaps the fan clutch.

    Kurt
    65,66 Midget
    57 Berkeley, MGA
    Working on quality rather than quantity

  17. #17
    Great Pumpkin JPSmit's Avatar
    Join Date
    Nov 2004
    Location
    Toronto, ON
    Posts
    18,711
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    57
    Thanked in
    54 Posts

    Re: Alternator help - please.

    Quote Originally Posted by nomad View Post
    Just got around to listening to the vid. Could the fan on the alternator be loose? I believe that they are held in place just by tightening the nut and nothing else. Sounds like that or perhaps the fan clutch.

    Kurt
    I did have an alternator guy spin it up on a machine and he heard nothing - but I will certainly check - thanks
    John-Peter Smit
    1976 MG Midget
    1969 Vauxhall Viva GT
    1958 Fiat Multipla (Barn art)

  18. #18
    Yoda
    Join Date
    Dec 2008
    Location
    South Dakota
    Posts
    3,928
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: Alternator help - please.

    JP, I'm guessing, like everyone else, but that noise doesn't sound like something that could be coming from inside the engine. Still if I had a 1500 I would check for crank end play to see if it was out of spec just from others experience. It seem's to be in concert with accelerating and decelerating. If the alternator isn't the issue i would sure suspect the fan clutch. Process of elimination. BTW, my engine diagnosis listening device has always been a piece of heater hose. I always though that worked the best.

    Kurt
    65,66 Midget
    57 Berkeley, MGA
    Working on quality rather than quantity

  19. #19
    Yoda TOC's Avatar
    Join Date
    Jun 2008
    Location
    Floe Ice, Antarctica
    Posts
    6,242
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    20
    Thanked in
    20 Posts

    Re: Alternator help - please.

    Or a cracked fan blade. Look closely. And do NOT lean over the fan or the known blade escape routes while listening.

  20. #20
    Freshman Member
    Join Date
    Dec 2019
    Location
    Southampton NY
    Posts
    3
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Alternator help - please.

    How are your thrust washers ?

Bookmarks

Posting Permissions

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