Timing

Discussion in 'Engine & Performance' started by Billyjoe12, Nov 13, 2017.

  1. Billyjoe12

    Billyjoe12 Junior Member

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    i know this is really weird but when timing my 79 k10 350 the indicator on the Hb only shows up when the timing light is hooked up to cylinder 6 not cylinder 1 does anyone know why this would happen? The truck does run.
     
  2. HotRodPC

    HotRodPC Administrator Staff Member

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    Moved your thread from Site News to Engine Performance to get you some help here.

    Sounds like something is 180 degrees out. But, go ahead and time it off the #6 and see it runs. If it's good, does it really matter where the light times from? Most of us actually time by ear since timing chain wear, distributor wear and such in these old engines can affect the light making it lie to you like a $10 crack whore. There's still reasons to use a timing light. I verified a bad harmonic balancer by using a light for example. If you're not real good at timing by ear, it'll at lest give you a base to start from. I prefer using a degreed timing light and I can verify timing by marks as called by the book. Then advance or time by ear and performance from there, lock it down where I like it, then use the light again to find out where my happy place is and record that. Next time I check my timing I can put it right back in the same place and if performace isn't as good then I know I have even more timing chain wear and will compensate even further. That's just me though. I'm certain others will disagree or have a different technique how they do their.
     
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  3. RustyPile

    RustyPile Full Access Member

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    Actually, you can set timing from #1 and #6 cylinders.. They fire 180 cam degrees apart and 360 crankshaft degrees apart.. I suspect either you're not connecting the light to #1 plug wire or you have some "cross fire" that affects the timing light.. To help prevent this, I always connect the light to the wire in a area where the wire spacing is widest...
     
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  4. 74 Shortbed

    74 Shortbed Full Access Member

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    Also if the pick up is directional, make sure it faces the right way..
     
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  5. Honky Kong jr

    Honky Kong jr Super Sarcastic Man

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    I usually go at the plug....
     
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  6. 74 Shortbed

    74 Shortbed Full Access Member

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    Yep, the arrow faces the plug.
     
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