How to rebuild an engine
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== Assembly == | == Assembly == | ||
*Always chase your threads with a thread chaser (not a tap) on all threaded holes, especially where torque values are critical, like head bolts holes, intake and exhaust holes, etc. | *Always chase your threads with a thread chaser (not a tap) on all threaded holes, especially where torque values are critical, like head bolts holes, intake and exhaust holes, etc. | ||
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*Clean all bolt threads thoroughly: A wire wheel on a grinder works well for this. | *Clean all bolt threads thoroughly: A wire wheel on a grinder works well for this. | ||
| − | *Be sure to check and verify before | + | *Clean and oil threads for a good torque reading but be sure that this is either what your manual instructs or is common practice for your engine/build. Take special care with soft metals like aluminum, as you may do irreparable damage. |
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| + | *Be sure to check and verify before reusing existing head bolts as some engines use "TTY" (torque to yeild) fasteners that should not be reused; new fasteners are required. | ||
| − | *Be sure | + | *Be sure to use anti-seize on the threads when using or replacing stainless steel fasteners, or when fasteners are threaded into aluminum. |
| − | *Always check the unit system and grade of replacement fasteners. Using metric instead of SAE threads, for example, is not in any way acceptable, nor is using ungraded or the wrong grade fasteners. Always use the fastener designated appropriate for your application. Using the wrong fastener will likely compromise the engine, its parts and/or put one at risk. In some instances, using too "strong" of a fastener may do more harm than good because they were intended to break before serious engine damage could occur. | + | *Always check the unit system and grade of replacement fasteners. Using metric instead of SAE threads, for example, is not in any way acceptable, nor is using ungraded or the wrong grade fasteners. Use caution if upgrading the fastener strength grade (i.e. using a Grade 8 instead of a Grade 5 fastener), "stronger" isn't necessarily "better". Always use the fastener designated appropriate for your application. Using the wrong fastener will likely compromise the engine, its parts and/or put one at risk. In some instances, using too "strong" of a fastener may do more harm than good because they were intended to break before serious engine damage could occur. |
== Testing and break-in == | == Testing and break-in == | ||
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