<div dir="ltr">Hank,<div><br></div><div>We may be going down that rabbit hole I mentioned before. Based on the picture you sent it looks like BN1 and BN2 pulley is for an SAE 7/8 or 28 series (7/8 x 32) series belt. The dimensions of the pulley for the 7/8 belt are:</div><div>Effective Groove Width - 0.785"</div><div>Groove Angle 34 deg</div><div>Groove Depth Min. - 0.709"</div><div>Rideout - 0.090" <a class="gmail_plusreply" id="plusReplyChip-0">+/- 0.045"</a></div><div><a class="gmail_plusreply"><br></a></div><div>Google "28445 Automotive cogged Belt" and you should see something close. Since you have a loose pulley may I suggest a trip to a good auto supply store and see how a 28 series belt fits the pulley you have.</div><div><br></div><div>I looked at the belt on the AH Spares website. I will suggest that given the size of the belt a cogged belt is a better option to more easily turn around the pulleys. The markings on the AHS belt are a bit of a red herring.</div><div><br></div><div>Hope this helps,</div><div>Harold</div><div><br><a class="gmail_plusreply"><br></a></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Sun, Mar 23, 2025 at 12:55 PM Hank Leach <<a href="mailto:gradea1@charter.net">gradea1@charter.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>Just went back to the AH Spares site and looked at the actual listing for the 100 belt.<span style="text-decoration:underline"> It has rideout</span> and appears to be the correct fit.(photos from site) Their notes as follows:</div>
<div>
<div>
<div>
<p>Austin Healey Fan Belt | 3/4-Inch Pulley | BN1 to BN2</p>
<p>"We have had these belts made to the correct O.E. 3/4 inch width unlike the reproductions available which sit to low in the pulleys making them less efficient and noisy."</p>
<p> </p>
</div>
</div>
<div>
<div>OE part number:</div>
<div>2H4238</div>
</div>
<div>
<div>Application:</div>
<div>BN1 - BN2</div>
<div> </div>
<div>Looks like<em>, if I can afford the shipping charge</em>, I should get one of these correct fitting belts. It even has the correct part number stamped to satisfy concours questions. Hank</div>
</div>
<br>-------------------- <br><br>From: "Harold Manifold" <<a href="mailto:manifold@telus.net" target="_blank">manifold@telus.net</a>> <br>To: <<a href="mailto:gradea1@charter.net" target="_blank">gradea1@charter.net</a>> <br>Cc: "Michael Salter" <<a href="mailto:michaelsalter@gmail.com" target="_blank">michaelsalter@gmail.com</a>>, "Healeys at Autox" <<a href="mailto:healeys@autox.team.net" target="_blank">healeys@autox.team.net</a>> <br>Sent: March 23, 2025 at 11:49 AM PDT <br>Subject: Re: Re: [Healeys] Correct V-belt </div>
<div>Hank et al,
<div> </div>
<div>I am not familiar with the pulleys on the BN1 and BN2 other than I have been told they are wider than both the 3/8" and 1/2" pulleys on the later Healeys. If someone out there has a pulley from a 100 and can measure the Effective Groove Width (the width at the top of the pulley) and the groove angle (it should be close to 34 deg.) I can determine the right series of belt. Length is more difficult.</div>
<div> </div>
<div>I will use my 45 year old SAE manuals as opposed to AI.</div>
<div> </div>
<div>Harold</div>
<div> </div>
<div> </div>
</div>
<div> </div>
<div class="gmail_quote">
<div class="gmail_attr">On Sun, Mar 23, 2025 at 11:37 AM Hank Leach <<a href="mailto:gradea1@charter.net" target="_blank">gradea1@charter.net</a>> wrote:</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>Harold-thank you! great article and completely understandable and useful. Now do you have anything about the monster V-belt on the 100? I think that is the belt both Michaels are talking about. This one is really hard to find, massive and often fitted wrongly thus eating up generator bearings. It was made to be mounted on the original truck(lorry) version 6 cylinder engine and carried over when the 4 (2660cc) was cut down and manufactured. I had nothing but pulley problems during my restoration. Would love to have a number for this one. Original belt part number 2H4238 fitting pulleys 1B1057 crank;1B1024 WP and 1B1727 dynamo. FYI AH Spares says this is the belt:
<table id="m_-8934612855065464866m_5584014619263123253ctl00_ContentPlaceHolder_dgProducts" border="1" cellspacing="0" cellpadding="5">
<tbody>
<tr>
<td><strong><a href="https://www.ahspares.co.uk/austin-healey/big-healey/cooling-heating-cht101-to-cht147/fan-belt.aspx" rel="noopener" target="_blank">CHT137</a></strong></td>
<td><strong><a href="https://www.ahspares.co.uk/austin-healey/big-healey/cooling-heating-cht101-to-cht147/fan-belt.aspx" rel="noopener" target="_blank">Fan Belt - Correct 3/4" Width</a></strong></td>
</tr>
</tbody>
</table>
3/4" wide. Moss has "original type" 021-066</div>
<div>Regards, Hank<br>-------------------- <br><br>From: "Harold Manifold" <<a href="mailto:manifold@telus.net" rel="noopener" target="_blank">manifold@telus.net</a>> <br>To: "Michael Salter" <<a href="mailto:michaelsalter@gmail.com" rel="noopener" target="_blank">michaelsalter@gmail.com</a>> <br>Cc: "Healeys at Autox" <<a href="mailto:healeys@autox.team.net" rel="noopener" target="_blank">healeys@autox.team.net</a>> <br>Sent: March 23, 2025 at 9:57 AM PDT <br>Subject: Re: [Healeys] Correct V-belt</div>
<div>Michael,
<div> </div>
<div>I want to save you from falling down the fan belt rabbit hole. A couple of years ago I wrote the attached article for our club magazine. It should help to give you a clear path forward.</div>
<div> </div>
<div>Harold</div>
</div>
<div> </div>
<div class="gmail_quote">
<div class="gmail_attr">On Sun, Mar 23, 2025 at 6:17 AM Michael Salter <<a href="mailto:michaelsalter@gmail.com" rel="noopener" target="_blank">michaelsalter@gmail.com</a>> wrote:</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>Michael, as I recall you are running an alternator on your 100. Has the original 100 generator pulley been fitted to the alternator, as the original alternator pulley would definitely require a totally different belt than would be correct for the 100 pulleys?</div>
<br>
<div class="gmail_quote">
<div class="gmail_attr">On Sat., Mar. 22, 2025, 8:19 p.m. Michael Oritt, <<a href="mailto:michael.oritt@gmail.com" rel="noopener" target="_blank">michael.oritt@gmail.com</a>> wrote:</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div class="gmail_default" style="color:rgb(51,51,255)">I went to the NAPA store today to get a V-belt and was sold a smooth belt with an FH (Fractional Horsepower) designation.<br>The packaging said it was for lawn and household applications of less than 1 HP. <br>I asked the sales clerk if an FH belt was suitable for automotive use and was told "Yes". <br>Now I see that Google AI says no--that such a belt is [i]not[/i] suitable for cars. <br>Who is right--AI or NAPA and if not FH which designation is correct?</div>
<div class="gmail_default" style="color:rgb(51,51,255)"> </div>
<div class="gmail_default" style="color:rgb(51,51,255)">Best--Michael Oritt</div>
<div class="gmail_default" style="color:rgb(51,51,255)"> </div>
</div>
_______________________________________________<br>Support Team.Net <a href="http://www.team.net/donate.html" rel="noopener" target="_blank">http://www.team.net/donate.html</a><br>Suggested annual donation $12.75<br><br>Archive: <a href="http://www.team.net/pipermail/healeys" rel="noopener" target="_blank">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive/healeys" rel="noopener" target="_blank">http://autox.team.net/archive/healeys</a><br><br><a href="mailto:Healeys@autox.team.net" rel="noopener" target="_blank">Healeys@autox.team.net</a><br><a href="http://autox.team.net/mailman/listinfo/healeys" rel="noopener" target="_blank">http://autox.team.net/mailman/listinfo/healeys</a><br><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com" rel="noopener" target="_blank">http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com</a><br><br></blockquote>
</div>
_______________________________________________<br>Support Team.Net <a href="http://www.team.net/donate.html" rel="noopener" target="_blank">http://www.team.net/donate.html</a><br>Suggested annual donation $12.75<br><br>Archive: <a href="http://www.team.net/pipermail/healeys" rel="noopener" target="_blank">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive/healeys" rel="noopener" target="_blank">http://autox.team.net/archive/healeys</a><br><br><a href="mailto:Healeys@autox.team.net" rel="noopener" target="_blank">Healeys@autox.team.net</a><br><a href="http://autox.team.net/mailman/listinfo/healeys" rel="noopener" target="_blank">http://autox.team.net/mailman/listinfo/healeys</a><br><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/manifold@telus.net" rel="noopener" target="_blank">http://autox.team.net/mailman/options/healeys/manifold@telus.net</a><br><br></blockquote>
</div>
<div> </div>
</blockquote>
</div></blockquote></div>