<div dir="ltr">Hi Phil,<div> Are those 6mm class 12.9 socket head cap screws? If so, that's very similar to the powertune venier sprockets for the 6 cylinder engines. I've used them a few times without issues, although the Goodparts option with 5/16 bolts is much more confidence inspiring on a race engine.</div><div> </div><div>For the 6mm bolts, I use blue loctite 243, and torque them to about 11 ft-lbs.</div><div><br></div><div><br></div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Jason Sukey</div><div><span></span><span></span>JS Performance Motoring, LLC<br></div><div>440.984.7720</div><div><a href="mailto:jason@jsperformancemotoring.com" target="_blank">jason@jsperformancemotoring.com</a><br></div><div><a href="https://www.facebook.com/JSPerformanceMotoring/" target="_blank">https://www.facebook.com/JSPerformanceMotoring/</a><br></div></div></div></div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Sep 23, 2024 at 8:24 AM vfracing--- via Fot <<a href="mailto:fot@autox.team.net">fot@autox.team.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><div style="font-family:arial;font-size:16px"><div dir="ltr">Hi all;</div><div dir="ltr"><br></div><div dir="ltr">After completely and embarassingly blowing cam timing on two consecutive engines i bought from Moss a so-called "vernier" adjustable cam timing sprocket made by Powertune. It consists of a hub and sprocket held in relative position to each other with 6 Allen head cap screws near the periphery of the sprocket. The cap screws have a fancy machined and anodized aluminum washer under them to spread the load. (See picture).</div><div dir="ltr"><br></div><div dir="ltr">My question/concerns are:</div><div dir="ltr"><br></div><blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px"><div dir="ltr">Is this robust enough to hold position? Is the friction between hub and sprocket sufficient? </div><div dir="ltr"><br></div><div dir="ltr">Do the aluminum "washers" hold up or do they creep over time, reducing the clamping load and allowing it to slip?</div><div dir="ltr"><br></div><div dir="ltr">Does anyone have a suggestion for the torque spec on the 6 Allen headed cap screws (no specs given with the sprocket) or the hub to cam (book says 24 - 26 ft lbs).</div><div dir="ltr"><br></div><div dir="ltr">Should I assemble this Loctite between the hub and sprocket to keep it from slipping?</div><div dir="ltr"><br></div><div dir="ltr">Or should I send this back and get a more robust unit? If so, where can I get a better one?</div></blockquote><div dir="ltr"><br></div><div dir="ltr">Thanks!</div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">Phil Gott</div><div dir="ltr"><br></div><div dir="ltr"><br></div></div></div>_______________________________________________<br>
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