EVO: Engine Mechanicals - Sub-09C

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====== EVO: Engine Mechanicals - Sub-09C ======
====== Evo Motor Mount Specs ======

The 1986-1991 FSMs list no torque specs for the rear mounts or lower front mounts. \\
There is only one spec in the 79-85 FSM (rear motor mounting bolt-nut: 16 to 24 ft lbs) and the 86-90 rear mount is the same part from 84-90. \\
For the rest, there are general "Torque Value" charts in the front of the service manual. ((1986-1990 HD Sportster FSM pg 1-8)) \\
It lists general torque values for bolt types but not specific mounting bolts. \\
It also says to torque to these values given in the tables unless specified otherwise. There are two charts (English and Metric). \\

Below is a list of torque values from the different year model FSMs. \\

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|  **1986-2003 Motor Mount Torque Specs in HD Service Manuals**  ||||||||
|Point of \\ Torque|SAE|Metric|Year Model|Point of Torque|SAE|Metric|Year Model|
|Rear Mount \\ Fasteners|16-24 ft-lbs \\ 25-30 ft-lbs|21-33 Nm \\ 34-41 Nm|1985→1990 \\ 1994-2003|Neg Cable Nut \\ to Rear Mount Stud|68-80 in-lbs|7-10 Nm|1994-2003| 
|Lower Front Mount \\ to Engine|25-30 ft-lbs|34-41 Nm|1994-2003| Lower Front Mount \\ to Frame|25-30 ft-lbs|34-41 Nm|1994-2003|
|Upper Front Mount \\ to Head|21-27 ft-lbs \\ 25-30 ft-lbs|28-36 Nm \\ 34-41 Nm|1986-1989 \\ 1990-2003|Upper Front Mount \\ to Frame|30-35 ft-lbs |40-47 Nm|1986-2003|
|Top Center Mount \\ to Heads|21-27 ft-lbs \\ 25-30 ft-lbs|28-36 Nm \\ 34-41 Nm|1986-1989 \\ 1990-2003|Top Center Mount \\ to Frame|30-35 ft-lbs|41-47 Nm|1986-2003|

----
\\

The charts below are from the torque value charts in the 86-90 FSM. \\
{{:techtalk:ref:svcproc:bolt_head_grade_markings.jpg?direct&300|}} ((drawing by Hippysmack)) \\

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|  **SAE  Torque Value Chart per Bolt Type**  ||||||||
|Bolt size|SAE 2 \\ 74,000 psi \\ Low carbon|SAE 5 \\ 120,000 psi \\ Medium carbon \\ heat treat|SAE 7 \\ 133,000 psi \\ Medium carbon \\ alloy|SAE 8 \\ 150,000 psi \\ Medium carbon \\ alloy|Socket head \\ cap screw \\ 160,000 psi \\ High carbon \\ quenched tempered|Socket head \\ set screw \\ 212,000 psi \\ High carbon \\ quenched tempered|Studs|
|#6|-|-|-|-|-|9 in/lb|Use \\ SAE \\ 2,5 and 8 \\ values \\ when \\ grade \\ is known \\ with nut \\ and \\ sufficient \\ strength|
|#8|-|14 in/lb|-|-|-|16 in/lb|:::|
|#10|-|22 in/lb|-|-|-|30 in/lb|:::|
|1/4"|6 ft/lb|10 ft/lb|13 ft/lb|14 ft/lb|16 ft/lb|70 in/lb|:::|
|5/16"|12 ft/lb|19 ft/lb|25 ft/lb|29 ft/lb|33 ft/lb|140 in/lb|:::|
|3/8"|20 ft/lb|33 ft/lb|44 ft/lb|47 ft/lb|54 ft/lb|18 ft/lb|:::|
|7/16"|32 ft/lb|54 ft/lb|71 ft/lb|78 ft/lb|84 ft/lb|29 ft/lb|:::|
|1/2"|47 ft/lb|78 ft/lb|110 ft/lb|119 ft/lb|125 ft/lb|43 ft/lb|:::|
|9/16"|69 ft/lb|114 ft/lb|154 ft/lb|169 ft/lb|180 ft/lb|63 ft/lb|:::|
|5/8"|96 ft/lb|154 ft/lb|215 ft/lb|230 ft/lb|250 ft/lb|100 ft/lb|:::|
|3/4"|155 ft/lb|257 ft/lb|360 ft/lb|380 ft/lb|400 ft/lb|146 ft/lb|:::|
|7/8"|206 ft/lb|382 ft/lb|570 ft/lb|600 ft/lb|640 ft/lb|-|:::|
|1"|310 ft/lb|587 ft/lb|840 ft/lb|700 ft/lb|970 ft/lb|-|:::|

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|  **Metric  Torque Value Chart per Bolt Type**  ||||||||
|Bolt size|SAE 2 \\ 5,202 kg/cm² \\ Low carbon|SAE 5 \\ 8,436 kg/cm² \\ Medium carbon \\ heat treat|SAE 7 \\ 9,350 kg/cm² \\ Medium carbon \\ alloy|SAE 8 \\ 10,545 kg/cm² \\ Medium carbon \\ alloy|Socket head \\ cap screw \\ 11,248 kg/cm² \\ High carbon \\ quenched tempered|Socket head \\ set screw \\ 14,902 kg/cm² \\ High carbon \\ quenched tempered|Studs|
|2|-|-|-|-|-|-|Use \\ SAE \\ 2,5 and 8 \\ values \\ when \\ grade \\ is known \\ with nut \\ and \\ sufficient \\ strength|
|3|-|-|-|-|-|-|:::|
|4|-|-|-|-|-|-|:::|
|5|-|-|-|-|-|-|:::|
|6|-|-|-|-|-|1.0|:::|
|8|-|1.6|-|-|-|1.8|:::|
|10|-|2.5|-|-|-|3.4|:::|
|6.4|8.3|13.8|18.0|19.4|22.1|8.1|:::|
|7.9|16.6|26.3|34.6|40.1|45.6|16.1|:::|
|9.5|27.7|45.6|60.8|65.0|74.7|24.9|:::|
|11.1|44.3|74.7|98.2|107.9|116.2|40.1|:::|
|12.7|65.0|107.9|152.1|164.6|172.9|59.5|:::|
|14.3|95.4|157.7|213.0|233.7|248.9|87.1|:::|
|15.9|132.8|213.0|297.3|318.1|345.7|138.3|:::|
|19.1|214.4|355.4|497.9|525.5|553.2|201.9|:::|
|22.2|283.5|528.3|788.3|829.8|885.1|-|:::|
|25.4|428.7|811.8|1161.7|968.1|1341.5|-|:::|

\\

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