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--></style></head><body lang=DE link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US>My thought is that a dowel pin has no other function than matching the parts together. The pin is not a press fit in most cases.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>This means, if the dowel pin get rotational forces, then all is too late and the car has to be parked.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The rotational force get transferred by the clamping force and the resulting friction between fly wheel an crank only.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Cheers<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Chris <o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Gesendet von meinem Windows 10 Phone</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='border:none;padding:0cm'><b>Von: </b><a href="mailto:fot@autox.team.net">Steve Yott via Fot</a><br><b>Gesendet: </b>Donnerstag, 22. Juni 2017 12:55<br><b>An: </b><a href="mailto:sjanzen@me.com">'Scott Janzen'</a>; <a href="mailto:sbarr@McCarty-Law.com">'Barr, Scott'</a><br><b>Cc: </b><a href="mailto:fot@autox.team.net">'FOT'</a><br><b>Betreff: </b>Re: [Fot] TR4 ARP Flywheel Bolts Question</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>Properly made and installed that would be an good solution. Issue is that if they are not sized properly and they should have a t-shape and be counter sunk they can cause even worse failure.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The right bolt used with the proper washer has a very large surface area and the bolt itself is shouldered resulting in a pretty strong install.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The next best thing to do IMHO is to install a second dowel pin. The real purpose of the bolt is to hold the flywheel onto the crank but the main strength is the counter sunk flywheel over the face of the crankshaft and the dowels holding the rotation forces. This way if the bolts should break you have two dowels which will prevent the flywheel from flying in an egg shape and destroying everything in its path.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Now the absolute best thing is to not use an aluminum flywheel! There is a reason they are not allowed in Europe….. Buy a steel flywheel and use 6 to 8 bolts then most of the issues are gone. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>IMHO<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Steve Yott<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Scott Janzen [mailto:sjanzen@me.com] <br><b>Sent:</b> Monday, June 05, 2017 3:28 PM<br><b>To:</b> Barr, Scott <sbarr@McCarty-Law.com><br><b>Cc:</b> timmmurphh@gmail.com; Steve Yott <tr4@wi.rr.com>; STEPHEN BOROWSKI <biznzman@pacbell.net>; FOT <fot@autox.team.net><br><b>Subject:</b> Re: [Fot] TR4 ARP Flywheel Bolts Question<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-US>Don't you guys use steel inserts in those flywheel holes?<br><br>Sent from my iPhone</span><span lang=EN-US style='font-size:12.0pt'><o:p></o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US><br>On Jun 5, 2017, at 7:55 AM, Barr, Scott via Fot <<a href="mailto:fot@autox.team.net"><span style='color:#0563C1'>fot@autox.team.net</span></a>> wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>This is what it looks like if you forget to chamfer the flywheel holes to clear the radius under the head.</span><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><image001.jpg><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Fot [<a href="mailto:fot-bounces@autox.team.net"><span style='color:#0563C1'>mailto:fot-bounces@autox.team.net</span></a>] <b>On Behalf Of </b>timmmurphh--- via Fot<br><b>Sent:</b> Sunday, June 04, 2017 5:53 PM<br><b>To:</b> 'Steve Yott' <<a href="mailto:tr4@wi.rr.com"><span style='color:#0563C1'>tr4@wi.rr.com</span></a>>; 'STEPHEN BOROWSKI' <<a href="mailto:biznzman@pacbell.net"><span style='color:#0563C1'>biznzman@pacbell.net</span></a>>; <a href="mailto:fot@autox.team.net"><span style='color:#0563C1'>fot@autox.team.net</span></a><br><b>Subject:</b> Re: [Fot] TR4 ARP Flywheel Bolts Question<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks for the clarification Steve, that makes sense.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Tim<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span lang=EN-US> </span></a><span lang=EN-US><o:p></o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Steve Yott [<a href="mailto:tr4@wi.rr.com"><span style='color:#0563C1'>mailto:tr4@wi.rr.com</span></a>] <br><b>Sent:</b> Sunday, June 4, 2017 4:56 PM<br><b>To:</b> <a href="mailto:timmmurphh@gmail.com"><span style='color:#0563C1'>timmmurphh@gmail.com</span></a>; 'STEPHEN BOROWSKI' <<a href="mailto:biznzman@pacbell.net"><span style='color:#0563C1'>biznzman@pacbell.net</span></a>><br><b>Subject:</b> RE: [Fot] TR4 ARP Flywheel Bolts Question<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>The reason they state to not use washers is they are afraid that the washers used will (1) not be hard enough and will compress under the bolt head and (2) all ARP bolts have very liberal radii between the head and shank. If there is a tight fitting washer this would be strain on this radius and could break the head.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>The 7/16” ARP bolts used on Chevy flywheels is what I fit to TR’6, late Spitfires and modified TR4 cranks. These bolts come with the special washers to use with them. I have used a proper washer under the 3/8” ARP bolts many times with no problems using a correct washer. You can also use an ARP crown wheel bolt for the same purpose and these come with proper washers.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Steve Yott <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Fot [<a href="mailto:fot-bounces@autox.team.net"><span style='color:#0563C1'>mailto:fot-bounces@autox.team.net</span></a>] <b>On Behalf Of </b>timmmurphh--- via Fot<br><b>Sent:</b> Sunday, June 04, 2017 1:59 PM<br><b>To:</b> 'STEPHEN BOROWSKI' <<a href="mailto:biznzman@pacbell.net"><span style='color:#0563C1'>biznzman@pacbell.net</span></a>>; <a href="mailto:fot@autox.team.net"><span style='color:#0563C1'>fot@autox.team.net</span></a><br><b>Subject:</b> Re: [Fot] TR4 ARP Flywheel Bolts Question<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>FWIW<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I just got a set of ARP 206-2802 flywheel bolts from Pegasus for the TR4. They are for “BMC A series”. The instruction specifically says, “DO NOT USE ANY WAHERS”, yes, all in caps for emphasis! They further state that ARP will not be responsible for failures is washers are used. The instructions also say, “Make sure there is an adequate chamfer under the bolt holes on the flywheel to clear the radius under the head of the bolt.” Torque is 55 Ft-Lb with specified lubricants on the threads.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I’ve never had that much good luck grinding the ends of bolts and still having it square so as not to start it cocked and runing the female threads. Maybe it’s just me</span><span lang=EN-US style='font-family:"Segoe UI Emoji",sans-serif'>😊</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Tim<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Fot [<a href="mailto:fot-bounces@autox.team.net"><span style='color:#0563C1'>mailto:fot-bounces@autox.team.net</span></a>] <b>On Behalf Of </b>STEPHEN BOROWSKI via Fot<br><b>Sent:</b> Friday, June 2, 2017 3:28 PM<br><b>To:</b> FOT List <<a href="mailto:fot@autox.team.net"><span style='color:#0563C1'>fot@autox.team.net</span></a>><br><b>Subject:</b> [Fot] TR4 ARP Flywheel Bolts Question<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><div><div id="yui_3_16_0_ym19_1_1496435068370_3242"><p class=MsoNormal style='background:white'><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black'>Does anyone have experience using the ARP flywheel bolts sold by Moss and others?</span><span lang=EN-US><o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1496435068370_3241"><p class=MsoNormal style='background:white'><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black'>I understand that you may have to shorten the bolt or it breaks the rear seal???</span><span lang=EN-US><o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1496435068370_3257"><p class=MsoNormal style='background:white'><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black'>Are they supposed to have a washer or not?</span><span lang=EN-US><o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1496435068370_3239"><p class=MsoNormal style='background:white'><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span lang=EN-US><o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1496435068370_3240"><p class=MsoNormal style='background:white'><span lang=EN-US style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black'>Thxs. Steve</span><span lang=EN-US><o:p></o:p></span></p></div></div></div></blockquote><p class=MsoNormal style='mso-margin-top-alt:5.0pt;margin-right:36.0pt;margin-bottom:12.0pt;margin-left:36.0pt'><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman",serif'>_______________________________________________<br><a href="mailto:fot@autox.team.net"><span style='color:#0563C1'>fot@autox.team.net</span></a><br><br><a href="http://www.fot-racing.com"><span style='color:#0563C1'>http://www.fot-racing.com</span></a><br><br>Donate: <a href="http://www.team.net/donate.html"><span style='color:#0563C1'>http://www.team.net/donate.html</span></a><br>Archive: <a href="http://www.team.net/archive"><span style='color:#0563C1'>http://www.team.net/archive</span></a><br>Forums: <a href="http://www.team.net/forums"><span style='color:#0563C1'>http://www.team.net/forums</span></a><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/fot/sjanzen@me.com"><span style='color:#0563C1'>http://autox.team.net/mailman/options/fot/sjanzen@me.com</span></a><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>