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techtalk:ih:engmech03 [2019/06/12 03:09] hippysmack [Rod Play] |
techtalk:ih:engmech03 [2019/12/09 16:23] hippysmack [Aftermarket Head Gaskets] |
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|{{:techtalk:ih:engmech:1969_heads_by_monte03.jpg?direct&400|}}| | |{{:techtalk:ih:engmech:1969_heads_by_monte03.jpg?direct&400|}}| | ||
| 1969 Iron Heads ((photo by Monte03 of the XLFORUM http://xlforum.net/forums/showthread.php?t=166440&page=6)) | | | 1969 Iron Heads ((photo by Monte03 of the XLFORUM http://xlforum.net/forums/showthread.php?t=166440&page=6)) | | ||
+ | |||
+ | ===== Aftermarket Head Gaskets ===== | ||
+ | Cometic MLS head gasket torque: | ||
+ | There are six torque values in sequence: 9-14-22-35-42-42 (all in ft/lb) \\ | ||
+ | When using aftermarket gaskets, it's important to note that the torque values in the FSM are for OEM gaskets. ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?p=5793537#post5793537)) \\ | ||
+ | The OEM gaskets offer a squeeze factor unavailable with steel gaskets. \\ | ||
+ | |||
+ | When using the MLS torque specs, you'll find they are not that different from the FSM. \\ | ||
+ | For instance, after you get to 9 ft/bs, it's about a quarter turn to 14, then about a quarter turn to 22 and so forth. \\ | ||
+ | But using the actual values instead of counting turns gets a more even pull on all sides and allows you to feel when something isn't right. \\ | ||
====== Valves ====== | ====== Valves ====== | ||
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==== 57-69 models ==== | ==== 57-69 models ==== | ||
Check rods for (up and down) play as well as (upper end side shake or rod tip) with the pistons removed from the rods. ((HD 1959-1969 FSM (99484-69) pg 3C-7)) \\ | Check rods for (up and down) play as well as (upper end side shake or rod tip) with the pistons removed from the rods. ((HD 1959-1969 FSM (99484-69) pg 3C-7)) \\ | ||
- | Side shake measurement can be done with a ruler using the outside edge of the case as a base line. \\ | ||
When appreciable up and down play is found and side shake at the extreme upper end of the rod is more than the following specs; \\ | When appreciable up and down play is found and side shake at the extreme upper end of the rod is more than the following specs; \\ | ||
The lower bearing should be re-fitted. \\ | The lower bearing should be re-fitted. \\ | ||
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**Motorcycles using rod bearings with steel retainers**: \\ | **Motorcycles using rod bearings with steel retainers**: \\ | ||
Check rods for (up and down) play as well as (upper end side shake or rod tip) with the pistons removed from the rods. \\ | Check rods for (up and down) play as well as (upper end side shake or rod tip) with the pistons removed from the rods. \\ | ||
- | Side shake measurement can be done with a ruler using the outside edge of the case as a base line. \\ | ||
When appreciable up and down play is found and side shake at the extreme upper end of the rod is more than the following specs; \\ | When appreciable up and down play is found and side shake at the extreme upper end of the rod is more than the following specs; \\ | ||
The lower bearing should be re-fitted. \\ | The lower bearing should be re-fitted. \\ | ||
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==== 79-85 models ==== | ==== 79-85 models ==== | ||
Check rods for up and down play in lower bearings. ((1979-1985 HD FSM (99484-85) pg 3-25)) \\ | Check rods for up and down play in lower bearings. ((1979-1985 HD FSM (99484-85) pg 3-25)) \\ | ||
+ | Measuring side shake is no longer recommended in the FSM as in above. \\ | ||
When up and down play is detected, the lower bearing should be refitted. \\ | When up and down play is detected, the lower bearing should be refitted. \\ | ||
\\ | \\ | ||
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