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Timing mark

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Old 01-25-2012, 02:51 PM   #1
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1987 Wagoneer
Default Timing mark

87 4.0

There are two holes in the harmonic balancer, but no zero mark for TDC. Do the two holes serve the purpose of a mark?
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Old 01-25-2012, 05:01 PM   #2
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1990 Comanche

The marks are there. Look more closely. Ignition timing is not adjustable BTW.
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Old 01-25-2012, 05:12 PM   #3
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1997 Cherokee

Holes are there to balance the HB. The timing mark is actually like a small cut in the back side. Some HB's dont have a timing mark on the front side so it might be hard to see, espeically if it's under the gauge on the timing cover.

What is it you're trying to do?
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Old 01-25-2012, 05:12 PM
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