C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

optispark replacement

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Old Apr 18, 2004 | 12:13 AM
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From: fort wayne in
Default optispark replacement

when replacing the optispark on a 94lt1 does the gear drive have an offset to go in one way only :chevy :rolleyes:


[Modified by jpslt1, 5:15 AM 4/18/2004]
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Old Apr 18, 2004 | 12:39 AM
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Default Re: optispark replacement (jpslt1)

Yes the back of the opti-spark unit on a 94 LT1 has a offset on it. It only installs one way and one way only. If you look really close you will see a flat spot on the spline. I hope this info helps you out.
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Old Apr 18, 2004 | 02:00 AM
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Default Re: optispark replacement (Anghellic_Life)

Don't forget to put the waterpump drive back on too, or it'll overheat it about 3 seconds! (not to mention ripping it back apart...) :thumbs:
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Old Apr 18, 2004 | 06:17 AM
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Default Re: optispark replacement (Anghellic_Life)

Yes the back of the opti-spark unit on a 94 LT1 has a offset on it. It only installs one way and one way only. If you look really close you will see a flat spot on the spline. I hope this info helps you out.
:iagree: BUT.....it IS possible to put the drive cam "off" a few teeth. You need to use an inspection mirror when installing to make sure it's oriented correctly.
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Old Apr 18, 2004 | 09:42 AM
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Default Re: optispark replacement (Alchemist)

BUT[/color].....[/i][/b]it IS possible to put the drive cam "off" a few teeth. You need to use an inspection mirror when installing to make sure it's oriented correctly.
Being that the opti drive is splined with a flat spot, you would literally have to beat it on, to get it a couple of teeth off.

Alchemist, step back from the car and put the big rubber hammer down. :D


[Modified by STL94LT1, 8:45 AM 4/18/2004]
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Old Apr 18, 2004 | 11:46 AM
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Default Re: optispark replacement (STL94LT1)

thanks for the information everyone :cheers:
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Old Apr 18, 2004 | 02:32 PM
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Default Re: optispark replacement (STL94LT1)

Being that the opti drive is splined with a flat spot, you would literally have to beat it on, to get it a couple of teeth off.

Alchemist, step back from the car and put the big rubber hammer down. :D
:lol: :lol: :lol: Oh...i was ready to use the BMFH on the plastic pig before i got it all figured out! :lol: :lol: :lol:

But there was no "forcing" involved when this happened...and the unit mounted flat and everything....but DAYUM did it run nasty!!!
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