LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Aligning The Optispark

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Old 04-09-2009, 09:06 PM
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Aligning The Optispark

Ok, so after at first just putting the pin in the cam gears when it felt like it was in and not checking TDC I tried putting it all together and starting it. Still no start, except this time instead of just cranking, it make extra noises like it was trying really hard to start and missed/backfired through the intake. So I read that I must make sure the pin went in the right way as it can be misplaced but there is only one true way it can go in for ignition.

Now, my dad helped me the second time around to find top dead center and we turned the crank by hand using the rocker arms as reference until the exhaust and intake valves on the no.1 cylinder were compressed. I had just the pin by itself in the cam gear where I thought it should have been, letting it turn until TDC was reached, and when we stopped its at 2 or 3 o'clock. Now did we do something wrong to find TDC, or if not, were should it be inserted so the teeth are in the right groove, because I have read people saying 6 o'clock and 9 o'clock, which is it?

Oh and can I start it without the waterpump installed for a few seconds to see iof I got it right this time?

Last edited by MarcR94v6; 04-09-2009 at 09:15 PM.
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Old 04-09-2009, 09:54 PM
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1994? Goes like this: http://shbox.com/1/93-94_opti.jpg
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Old 04-09-2009, 10:10 PM
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yes you can fire it up without the pump on it
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Old 04-10-2009, 09:07 AM
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only the cam gear is too deep inside and I can't see the key slot on that side. I seem to have gotten it wrong the first time.
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Old 04-10-2009, 12:02 PM
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Originally Posted by MarcR94v6
only the cam gear is too deep inside and I can't see the key slot on that side. I seem to have gotten it wrong the first time.
Align the cam gear like in the lower right pic of my link. Then you should be able to see the slot. That is #6 TDC. Align the opti side and slide it straight on.
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