Direction of Engine Mount Bolts? - Zenith Aircraft Builders and Flyers2024-03-28T15:13:45Zhttps://zenith.aero/forum/topics/direction-of-engine-mount-bolts?commentId=2606393%3AComment%3A611163&feed=yes&xn_auth=noWell, I got my bolts yesterda…tag:zenith.aero,2018-02-09:2606393:Comment:6123712018-02-09T20:37:18.592ZJim Davishttps://zenith.aero/profile/JimDavis449
<p>Well, I got my bolts yesterday and I was surprised but happy I got them to go from inside the fuselage out to the firewall :-). I did temporarily remove one of the an3 bolts from each mount bracket and then just a teeny tiny ream with the drill bit and all is good.</p>
<p> Thanks for the feedback - you all are the best!</p>
<p></p>
<p>- Jim</p>
<p>Well, I got my bolts yesterday and I was surprised but happy I got them to go from inside the fuselage out to the firewall :-). I did temporarily remove one of the an3 bolts from each mount bracket and then just a teeny tiny ream with the drill bit and all is good.</p>
<p> Thanks for the feedback - you all are the best!</p>
<p></p>
<p>- Jim</p> For rivets I am quite sure yo…tag:zenith.aero,2018-02-05:2606393:Comment:6113202018-02-05T13:19:50.900ZJoe Hopwoodhttps://zenith.aero/profile/JoeHopwood
<p>For rivets I am quite sure you are right. But if you think of hole being drilled at ten degree angle, I am pretty sure that is OK. Especially for bolts as large as the engine mounts. My flying 601 has over 700 hours and all is well. I check torque every year.</p>
<p>For rivets I am quite sure you are right. But if you think of hole being drilled at ten degree angle, I am pretty sure that is OK. Especially for bolts as large as the engine mounts. My flying 601 has over 700 hours and all is well. I check torque every year.</p> I'll have to check the FAA ma…tag:zenith.aero,2018-02-04:2606393:Comment:6110932018-02-04T18:38:50.159ZGlenn Davishttps://zenith.aero/profile/GlennDavis
<p>I'll have to check the FAA manual but I think I remember reading that over sized and elongated holes are a no-no.</p>
<p>I'll have to check the FAA manual but I think I remember reading that over sized and elongated holes are a no-no.</p> Thanks Jim,
I must have sligh…tag:zenith.aero,2018-02-04:2606393:Comment:6113702018-02-04T16:51:47.946ZJoe Hopwoodhttps://zenith.aero/profile/JoeHopwood
<p>Thanks Jim,</p>
<p>I must have slightly elongated the hole but don't remember for sure. I do for sure remember that first ones that came with kit, bolt was welded in place. For only 10 degrees, the elongation required would not be very much.</p>
<p>Thanks Jim,</p>
<p>I must have slightly elongated the hole but don't remember for sure. I do for sure remember that first ones that came with kit, bolt was welded in place. For only 10 degrees, the elongation required would not be very much.</p> Sure, it's the engine mount b…tag:zenith.aero,2018-02-04:2606393:Comment:6111632018-02-04T13:31:45.608ZJim Davishttps://zenith.aero/profile/JimDavis449
<p>Sure, it's the engine mount brackets themselves. The front edge is canted back about 10 degrees I think. There just isn't room to get a long bolt through from the inside. I'll take a pick later today.</p>
<p>Sure, it's the engine mount brackets themselves. The front edge is canted back about 10 degrees I think. There just isn't room to get a long bolt through from the inside. I'll take a pick later today.</p> Do you mind sharing what the…tag:zenith.aero,2018-02-04:2606393:Comment:6110792018-02-04T13:08:21.838ZJoe Hopwoodhttps://zenith.aero/profile/JoeHopwood
<p>Do you mind sharing what the immovable object was that was in the way? Some times just a slight change in assembly order can make all the difference in the world.</p>
<p>Do you mind sharing what the immovable object was that was in the way? Some times just a slight change in assembly order can make all the difference in the world.</p> I think I'll be doing the sam…tag:zenith.aero,2018-02-04:2606393:Comment:6111562018-02-04T01:36:40.428ZJim Davishttps://zenith.aero/profile/JimDavis449
<p>I think I'll be doing the same as you - Davis's Unite :-)</p>
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<p>I think I'll be doing the same as you - Davis's Unite :-)</p>
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<p></p> No, My bolt heads are FF. I k…tag:zenith.aero,2018-02-04:2606393:Comment:6111552018-02-04T01:31:46.350ZGlenn Davishttps://zenith.aero/profile/GlennDavis
<p>No, My bolt heads are FF. I know I'm a disappointment to the Davis name but I could not get the bolts to go thru like you guys did short of beating the hell out of it or elongating the hole .I researched it and put em in back asswards, I can't remember if Viking supplied them or not but I don't think so.</p>
<p></p>
<p>Glenn Davis</p>
<p>5362P</p>
<p>No, My bolt heads are FF. I know I'm a disappointment to the Davis name but I could not get the bolts to go thru like you guys did short of beating the hell out of it or elongating the hole .I researched it and put em in back asswards, I can't remember if Viking supplied them or not but I don't think so.</p>
<p></p>
<p>Glenn Davis</p>
<p>5362P</p> Hey Glenn,
Did you use bolt…tag:zenith.aero,2018-02-04:2606393:Comment:6110642018-02-04T01:19:09.462ZJim Davishttps://zenith.aero/profile/JimDavis449
<p>Hey Glenn,</p>
<p> Did you use bolts from Viking? If not, what did you use? Are they facing out (threads on the engine side of the firewall)?</p>
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<p>Thanks - Jim</p>
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<p>Hey Glenn,</p>
<p> Did you use bolts from Viking? If not, what did you use? Are they facing out (threads on the engine side of the firewall)?</p>
<p></p>
<p>Thanks - Jim</p>
<p></p> According to the FAA acceptab…tag:zenith.aero,2018-02-04:2606393:Comment:6111522018-02-04T00:25:51.168ZGlenn Davishttps://zenith.aero/profile/GlennDavis
<p>According to the FAA acceptable methods ,techniques and practices it is preferred to torque the nut if possible but torquing the bolt is not prohibited. Page 7-298 for those interested.</p>
<p></p>
<p>Glenn Davis </p>
<p>5362P</p>
<p>According to the FAA acceptable methods ,techniques and practices it is preferred to torque the nut if possible but torquing the bolt is not prohibited. Page 7-298 for those interested.</p>
<p></p>
<p>Glenn Davis </p>
<p>5362P</p>