[Healeys] 100 fanbelts

Tue May 7 01:48:36 MDT 2024

All -

An excellent belt to use on the 100 is the Mitsuboshi RECMF-8440 which is a
perfect fit toothed belt.  These are sold for use in machinery but they sit
nicely in the groove and are not expensive at all.  You can order online no
problem.

Best,

Alan

On Tue, May 7, 2024 at 1:52 AM Harold Manifold <manifold at telus.net> wrote:

> A few comments on fan belts. Cog belts are better for small diameter
> pulleys like those found on our Healeys but are not a must have. I am not
> sure about 100's but the 6 cylinder Healeys have a 36 groove angle on the
> pulleys. Try to find a belt that is close to 36 degrees. The width of the
> belt is best determined by Ride-Out.
>
> Ride-Out is the distance from the outside diameter of the pulley to the
> top of the belt. For both the 3/8” and ½” pulley Ride-Out should be between
> 0.015” – 0.105” or about 1/16”. If the Ride-Out is outside of this range
> either the belt is worn out or it is the wrong size belt.
>
> [image: image.png]
> Note there should be a gap between the bottom of the belt and bottom of
> the pulley groove.
>
> To find the right belt for my 3000 I went to a supplier with a large stock
> and used trial and error to find the right length and width.
>
> Harold
>
> On Mon, May 6, 2024 at 9:48 AM Hank Leach via Healeys <
> healeys at autox.team.net> wrote:
>
>> Great story Bill...that's when $10 was ten dollars. The whole issue with
>> Healey belts is the tightness and I have seen quite a few fractured
>> generator mounts on the engines from being too tight. There is also a
>> caution in the service manual as to burning out bearings in the generator
>> if too tight.
>>
>> When I first saw a 100 belt I was amazed as to it's stoutness-only to be
>> outdone by the flywheel! I, too searched far and wide for the proper belt
>> and my spare from John Bull turned out to be incorrect. I took the original
>> belt to a John Deere store and found one that worked-used on tractors and
>> mowers. Just another source for those obscure items that Autozone does not
>> carry.
>>
>> The issue I had restoring my 100 revolved around the improper generator
>> pully (as John Harper say there are many) After assembly the belt did not
>> line up with the crank pulley-Kent Lambert (dearly departed) supplied the
>> proper pulley.  Hank
>>
>> --------------------
>>
>> From: "Bill Kollar via Healeys" <healeys at autox.team.net>
>> Reply-To: "Bill Kollar" <wkollar at nycap.rr.com>
>> To: <healeys at autox.team.net>
>> Sent: May 5, 2024 at 6:07 PM PDT
>> Subject: Re: [Healeys] 100 fanbelts
>>
>> This brings to mind a 54 BN1 Fan Belt Story.
>>
>> Mid to late 60's or so,  I was traveling home, in my  54, 100-4 after
>> going to the Sunday afternoon  NASCAR Sportsman/Modified races at Victoria
>> Speedway, off Rt 20 in NY.   On the way home I blew a fan belt while going
>> through a very small village, a one gas station town.   Since the gas
>> station was my only hope to get running again I walked there, went inside
>> and discussed the situation with the attendant/owner.  As expected, he did
>> not have a Healey belt in stock but he let me rummage through a bunch of
>> old belts he had stored in a back room.
>>
>> It took me about 15 or 20 minutes or so to find a belt that looked as if
>> it might fit, close to the proper width and length.  I believe it was a
>> belt for some tractor trailer.  He wanted $10.00 for it, I only had $5.00,
>> he took the $5 and I was off to attempt an installation.  I cleaned the
>> belt, as best as I could and installed It, the fit was not perfect but
>> basically okay  It did however protrude slightly higher above the pulley
>> than the one that had blown.  I left that belt on the car for a couple more
>> years with no further problems.
>>
>> ------------------------------
>>
>> On 5/4/2024 4:38 PM, mike brooks via Healeys wrote:
>>
>> The fanbelt for a 100 should be 3/4" wide and 1/2" deep in a V shape.
>> 3/4" wide (19mm) is not a currently standard metric size. I've just bought
>> a replacement  belt from one of the usual UK suppliers. It's 22mm wide and
>> doesn't sit in the pulleys properly. I then went to another supplier who
>> claims to be selling the correct width belt. It turned out to be exactly
>> the same 22mm size. I've researched this, and these belts are standard
>> modern metric size "C". The belt that came off my 100 ( it had been there
>> for at least 20 years and 12000 miles) was a B1130 B43 belt, 17mm wide. It
>> sat slightly low in the pulley grooves, but was much more flexible than the
>> 22mm belts and was altogether a better fit.
>>
>> What are others using for their 100 fan belts? Note I don't want to
>> convert to narrow belts and pulleys.
>>
>> Mike
>> 56 BN2
>>
>> Yahoo Mail: Search, organise, conquer
>> <https://mail.onelink.me/107872968?pid=NativePlacement&c=Global_Acquisition_YMktg_315_EmailSignatureGrowth_YahooMail:Search,Organize,Conquer&af_sub1=Acquisition&af_sub2=Global_YMktg&af_sub3=&af_sub4=100000945&af_sub5=OrganizeConquer__Static_>
>>
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>>
>> --
>> Ever Wonder ?
>>
>> _bill
>>
>>
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