Timing tabs and damper TDC lines SBC
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*A third timing mark was used from about 1978 to about 1995. It is at the 12 o’clock position- or 40º before the keyway. This damper uses a timing cover that has the tab welded on at about the 12 o'clock position. Professional Products lists the years for this type damper line as being 1984-1995 and is a 6-3/4” diameter damper. | *A third timing mark was used from about 1978 to about 1995. It is at the 12 o’clock position- or 40º before the keyway. This damper uses a timing cover that has the tab welded on at about the 12 o'clock position. Professional Products lists the years for this type damper line as being 1984-1995 and is a 6-3/4” diameter damper. | ||
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| + | ==Relocating the damper line== | ||
| + | Below is an image of a damper that was originally for a 12 o'clock timing tab- notice where the original TDC line is located. | ||
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| + | In this case, it was necessary to use a different tab so the engine could be timed easier, because of the view being blocked from using the 12 o'clock tab and damper line. | ||
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| + | So, the bolt-on timing tab and timing cover was used, and the damper line relocated by hacksawing a shallow groove into the damper at the correct location to indicate TDC on the bolt-on tab. The new line can be easily highlighted with white paint, etc. so it can be identified as the correct line to use when timing the engine. | ||
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| + | [[File:RELOCATED DAMPER LINE.jpg]] | ||
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==Checking the timing tab/damper for accuracy== | ==Checking the timing tab/damper for accuracy== | ||
If you're unsure, or just want to check the accuracy of the tab and damper mark for TDC, [http://www.crankshaftcoalition.com/wiki/Determining_top_dead_center DETERMINE TDC] and [http://www.crankshaftcoalition.com/wiki/How_to_make_a_timing_tape MAKE A TIMING TAPE] will help you to see for yourself. | If you're unsure, or just want to check the accuracy of the tab and damper mark for TDC, [http://www.crankshaftcoalition.com/wiki/Determining_top_dead_center DETERMINE TDC] and [http://www.crankshaftcoalition.com/wiki/How_to_make_a_timing_tape MAKE A TIMING TAPE] will help you to see for yourself. | ||
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