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techtalk:evo:engmech03a [2019/08/04 14:23]
hippysmack [Using Double Nuts]
techtalk:evo:engmech03a [2019/12/10 02:32]
hippysmack
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 ====== Cylinder / Head Bolt Issues and Repair ====== ====== Cylinder / Head Bolt Issues and Repair ======
 ===== Sub Documents ===== ===== Sub Documents =====
-See also [[techtalk:​evo:​engmech03b|Time-Sert Repair on Engine Case Cylinder / Head Stud Hole]] ​in the Sportsterpedia for cylinder / head stud repair. +See also in the Sportsterpedia:​ 
- +  * [[techtalk:​evo:​engmech03b|Time-Sert Repair on Engine Case Cylinder / Head Stud Hole]] 
 +  * [[techtalk:​ref:​genmsr36#​warped_or_damaged_thread_repair|Warped or Damaged Thread Repair]]
 ===== Loose Head Bolt Studs ===== ===== Loose Head Bolt Studs =====
 A big concern about the studs becoming loose is the threads being stripped in the case. \\ A big concern about the studs becoming loose is the threads being stripped in the case. \\
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 With the bolts loosening, it is at least suspect that the threads or the hole strength is compromised. ((Hippysmack of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=2074117&​page=2)) \\ With the bolts loosening, it is at least suspect that the threads or the hole strength is compromised. ((Hippysmack of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=2074117&​page=2)) \\
  
-|  Weakest head stud holes in the case. ((photo by Hippysmack)) ​ | +|  Weakest head stud holes in the case. ((photo by Hippysmack))  |  Head bolt pulled out of the case. ((photo by Blue Scoot of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​p=5793625))  | 
-|{{:​techtalk:​evo:​engmech:​weakest_cylinder_bolt_threads_by_hippysmack.jpg?​direct&​300|}}|+|{{:​techtalk:​evo:​engmech:​weakest_cylinder_bolt_threads_by_hippysmack.jpg?​direct&​300|}}|{{:​techtalk:​evo:​engmech:​head_bolt_pulled_out_by_blue_scoot.jpg?​direct&​300|}}|
  
 There is a procedure in the manual for tightening the studs before installing the cylinders and heads. \\ There is a procedure in the manual for tightening the studs before installing the cylinders and heads. \\
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 ==== Using Double Nuts / Jam Nuts ==== ==== Using Double Nuts / Jam Nuts ====
 +Install 2 nuts on the top threads and torque the two nuts to 35ft pounds or higher. \\ 
 +Be aware the tall studs can stretch if it takes too much torque to break them free. \\ 
 +Be sure to use rags around the bore so as to not get any debris in the engine while removing the stud(s). \\
  
 |  Three jam nuts used here. ((photo by A 4 liter V8 eater of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​p=4442041#​post4442041))| |  Three jam nuts used here. ((photo by A 4 liter V8 eater of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​p=4442041#​post4442041))|