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Thread: Harmonic Balancer

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    Jedi Knight Healey Nut's Avatar
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    Harmonic Balancer

    Does anyone have a line on where to get one for a BT7 engine without having to mortgage my house and give up my first born for .....holy schmolly those things are expensive .
    "If it aint broke ....dont fix it "
    " Thats not an oil leak ..........its a special automatic British rustproofing system "
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    Re: Harmonic Balancer

    I have never priced one, fortunately. But have you tried Healey Surgeons in Tacoma Park, Md. They might have a used one. Also I just thought of a little shop near me here in Pa. It is called Sports Car Haven and addressed in Danville, Pa. or Bloomsburg, Pa. The owner is Lorne and he has had a few stripped Healeys in the past for parting out.
    About TV Shows-
    "...you really can't restore a car in 10 days. I don't want to watch a race where people have to restore it in a week. It's not going to drive, and those cars never work. In real life, it takes years to get it right. " Jay Leno.

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    Yoda
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    Re: Harmonic Balancer

    Dumb question: did BT7s come with a balancer originally, or are you looking for an upgrade, or ?

    You might try these guys. They rebuilt my BJ8 damper and I was pleased with their service.

    https://www.damperdoctor.com/

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    Re: Harmonic Balancer

    Quote Originally Posted by Healey Nut View Post
    Does anyone have a line on where to get one for a BT7 engine without having to mortgage my house and give up my first born for .....holy schmolly those things are expensive .
    Here's an option, shopping might cost you.....

    https://www.ebay.com/itm/Pro-Race-64...-/322893258295
    Dougie
    '65 BJ8 3000 MKIII GN.29
    '57 100-SIX MM Vintage Racer GN.1 #414
    Team Healey PDX

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    Yoda steveg's Avatar
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    Re: Harmonic Balancer

    You might be able to get a used one from British Car Specialists or Healey Surgeons and have it rebuilt by damper doctor.
    Steve Gerow
    Altadena, CA, USA
    Maker of most complete Big Healey rear disc kit
    Check out my galleries:
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    Re: Harmonic Balancer

    Quote Originally Posted by Healey Nut View Post
    Does anyone have a line on where to get one for a BT7 engine without having to mortgage my house and give up my first born for .....holy schmolly those things are expensive .
    Here is one possibility:
    https://www.bighealey.co.uk/performa...lley-bm-eng643

    Dan M.

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    Jedi Warrior BJ8Healeys's Avatar
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    Talking Re: Harmonic Balancer

    Quote Originally Posted by Bob_Spidell View Post
    Dumb question: did BT7s come with a balancer originally, or are you looking for an upgrade, or ?

    You might try these guys. They rebuilt my BJ8 damper and I was pleased with their service.

    https://www.damperdoctor.com/
    I wanted my original BJ8 damper rebuilt, so I sent an inquiry to damperdoctor via their website. No response -- ever. I did it again, same result. I called them, left a message. Same result. Did it again, same result. I can't say I was impressed with the interest damperdoctor showed in providing customer service.
    I ended up buying one of those expensive ProRace dampers from Moss after I saw one on someone else's car. Installing it was fun, since the X-brace in front of the radiator restricts the ability to swing a hammer, which you have to do after jacking the nose of the engine up to clear the cross-member and heating the thing up to drive it onto the shaft. It looks like a quality item (as most things made in Australia are), but the damper was built for Chevy's, etc. and happens to be listed as applicable to A-H 3000s. The numbers and degree markings on it are intended to be read from the left (driver's side, LHD cars), instead of the right like God and BMC intended. I didn't think the markings would stand out very well against the shiny silver damper, so I marked 15 deg. BTDC on it with white paint before installing it. I'm glad I did.

    I called the ProRace technical support phone number in California to discuss an issue. The number got me Sales. They referred me to a specific guy in Chicago. I called him and discussed the difficulty of installing it with the hammer because of the X-brace. His comment was "You seem to know more about Healeys than I do. I'm gonna keep your number and refer anybody else who needs help to you!". I haven't heard from anyone yet

    One more thing: the center recess of the ProRace damper where the dog nut goes does not allow room for a washer to be bent over to lock the nut like the original. I used Loc-Tite on the threads before torquing the nut to 90 lb-ft. I hope it stays there.
    Last edited by BJ8Healeys; 05-23-2019 at 05:15 PM. Reason: more info
    Steve Byers
    HBJ8L/36666
    BJ8 Registry
    Havelock, NC

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    Yoda steveg's Avatar
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    Re: Harmonic Balancer

    I used DamperDudes. They were responsive. It's been maybe 5 years and the damper is holding up.

    http://www.damperdudes.net//index.php?osCsid=33esbgunn2lshqi8mp0p5ljj74

    screenshot.1712.jpg
    Steve Gerow
    Altadena, CA, USA
    Maker of most complete Big Healey rear disc kit
    Check out my galleries:
    http://www.pbase.com/stevegerow


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    Yoda
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    Re: Harmonic Balancer

    I thought Damper Doctor website looked unfamiliar ... I think it was Damper Dudes I used. IIRC, they said Damper Dr sent them the tough ones they couldn't to.

    Edit: the Dudes have a Healey damper on the shelf; looks like a fair price:

    http://www.damperdudes.net//index.ph...0he4es6ethqb81

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    Jedi Knight
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    Re: Harmonic Balancer

    Steve Byers: ****! your story sounds conceptually familiar (i.e. I haven't walked into that particular wall with my nose, but sure expect to, depending on what I'm trying to do).
    I bought a dampner (damper? dampener?) for our BJ7 a few years ago from BPNW (British Parts North West) as it was on sale at the time. This was a shop install and I didn't hear any yelling and screaming: I believe that they were able to raise the engine enough to install it. There were doing a swack of other work on the car as well, so the rad etc. would have been out. 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

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    Yoda
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    Re: Harmonic Balancer

    Damper. There's an old story--urban legend, maybe--about an engineering professor that would splash water on students in the front rows and proclaim "THAT'S a dampener!"

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    Jedi Knight Healey Nut's Avatar
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    Re: Harmonic Balancer

    Quote Originally Posted by Bob_Spidell View Post
    I thought Damper Doctor website looked unfamiliar ... I think it was Damper Dudes I used. IIRC, they said Damper Dr sent them the tough ones they couldn't to.

    Edit: the Dudes have a Healey damper on the shelf; looks like a fair price:

    http://www.damperdudes.net//index.ph...0he4es6ethqb81
    I emailed these guys , its not in stock and it looks like they need a core exchange so if you dont have an exchange core its an extra 100$ .
    Fortunately I do have a core but if they dont answer my email then chances are they wont get my business .
    "If it aint broke ....dont fix it "
    " Thats not an oil leak ..........its a special automatic British rustproofing system "
    Best Healey in show ABCD Ottawa 2013
    Best Healey in Show Boot n Bonnett Kingston 2013

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    Yoda steveg's Avatar
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    Re: Harmonic Balancer

    They rebuilt mine. IIRC it took a couple of weeks, maybe 3.

    It's better to call than email. I'd never write off a small supplier because they didn't email me back.
    Steve Gerow
    Altadena, CA, USA
    Maker of most complete Big Healey rear disc kit
    Check out my galleries:
    http://www.pbase.com/stevegerow


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    Jedi Knight Healey Nut's Avatar
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    Re: Harmonic Balancer

    So after looking at Steve Gs pic in post 8 I took what I had to my sandblasting cabinet to see what I could uncover .
    Heres the results . My question is does the dampener look useable and correct for a BT7 , the ones on my BJ8s are much thicker .
    Also does the orientation of the dampener on the pulley matter ? I see a small drilled section on it which I assume was for balance .
    Attached Images Attached Images
    "If it aint broke ....dont fix it "
    " Thats not an oil leak ..........its a special automatic British rustproofing system "
    Best Healey in show ABCD Ottawa 2013
    Best Healey in Show Boot n Bonnett Kingston 2013

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    Yoda steveg's Avatar
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    Re: Harmonic Balancer

    It's the correct older version for your BT7. The later type are only used on late BJ8s.
    It's rebuildable. Mine has drill holes in the back from being balanced. Unless you can find an index mark to the pulley, you have no way of knowing if it was balanced to the pulley.

    The pulley bolts are coarse thread. Can't think of any other coarse thread bolts on a stock Healey.
    Steve Gerow
    Altadena, CA, USA
    Maker of most complete Big Healey rear disc kit
    Check out my galleries:
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    Jedi Knight Healey Nut's Avatar
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    Re: Harmonic Balancer

    Tks Steve .
    so if its rebuildable then what exactly is missing ?
    "If it aint broke ....dont fix it "
    " Thats not an oil leak ..........its a special automatic British rustproofing system "
    Best Healey in show ABCD Ottawa 2013
    Best Healey in Show Boot n Bonnett Kingston 2013

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    Yoda steveg's Avatar
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    Re: Harmonic Balancer

    You have the two parts of the balancer/pulley combo. You only need the 6 bolts to hold them together (item 37).

    From Moss catalog, "Internal Engine 100-6, 3000" section:

    screenshot.1715.jpg

    The rear of the pulley hub is a sealing surface. If it's pitted, suggest adding a speedi sleeve or redi sleeve.
    Steve Gerow
    Altadena, CA, USA
    Maker of most complete Big Healey rear disc kit
    Check out my galleries:
    http://www.pbase.com/stevegerow


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    Jedi Knight Healey Nut's Avatar
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    Re: Harmonic Balancer

    Tks Steve , good tip about the bolts , never gave it a thought till you mentioned it . Looked in the bolts bucket today and sure enough there are some coarse thread 1” bolts that fit .
    This rebuild is a challenge for sure as the guy who took it all apart (not me I bought the car in boxes)didn’t categorize anything , big parts in one box , bolts in a bucket and thats it .
    So rebuilding any section is 2hrs searching and finding then sandblasting n cleaning and reassembly is 15mins .
    "If it aint broke ....dont fix it "
    " Thats not an oil leak ..........its a special automatic British rustproofing system "
    Best Healey in show ABCD Ottawa 2013
    Best Healey in Show Boot n Bonnett Kingston 2013

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    Re: Harmonic Balancer

    I have an odd question: how out of balance do the older BT7 style dampers get? Can you "feel" a vibration when they're not right?

    I always assumed mine was fine, but I just happened to see it spinning at idle and it is NOT round (or at least not centered). I haven't measured it, but both inner and out plates have a very visible bobble.

    I do see lots of drill holes, so someone has balanced it in the past.... I'm not relishing pulling it out to investigate, but if it's really unbalanced, that can't be good.

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    Yoda
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    Re: Harmonic Balancer

    My take: Get your damper rebuilt. I've seen what happens when they self-destruct, and it ain't pretty (start with a new or repaired radiator).

    The damper, well, damps because there is a layer of rubber between two concentric rotating masses. Rubber is probably the most perishable substance on cars; AFAIK the rebuilders all use silicone (it looks different than original, but I don't know if even the concours judges know or care).

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