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

95 optispark install help

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Old Aug 8, 2005 | 07:06 PM
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Default 95 optispark install help

I have a 94 LT1 I am building, and I am upgrading to the 95 timing cover, cloyes double roller gears and chain.
I got the new 95 opti today, and my service manual does not show any seal or o-ring behind the opti, where it sets into the timing cover, as my GM service manual shows the 94 setup (I don't know if the 95 is different).
Is there ant type of seal I need to install?
Also, there are areas machined into the shaft of the opti to go around the 3 camshaft bolts, and there are 3 slots that the long pin from the camshaft can go into. Am I correct that I put that pin into the slot that is marked different than the other 2 slots?
I am grateful for any help you provide.

prattman
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Old Aug 8, 2005 | 07:27 PM
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I can not help you with the second part of your question, but when I replaced the opti-spark last year on my 95, there was no gasket between the two, I too thought that was strange, but have had no problems as of yet.

Good Luck

Last edited by Gooseit; Aug 8, 2005 at 07:28 PM. Reason: Missed a word
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Old Aug 8, 2005 | 07:30 PM
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To up grade you need the 95 opti with the large base not the small one.
You also need to change the timing cover to the large hole.
They make 2 diff sizes.

The seal is in the new cover.
The pin goes into the water pump gear and you have gear to drive the pump.
The opti just has apin with splines with one slott in it,that has to be lined up.

Last edited by REDC4CORVETTE; Aug 8, 2005 at 07:47 PM.
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Old Aug 8, 2005 | 07:37 PM
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Opti seal for '95 type is in the Timing cover as shown:



also make sure your new Opti has these 2 rubber O-rings on shaft:




Last edited by MikeC4; Aug 8, 2005 at 07:42 PM.
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Old Aug 8, 2005 | 07:38 PM
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Gentlemen,

Thanks for the reply.
I have the 95 cover, and I bought the 95 Opti. Also have installed the hotcam withthe long dowel pin, justnot sure which slot the pin goes into.

prattman
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Old Aug 8, 2005 | 07:40 PM
  #6  
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MikeC4,

Got the seal installed already, thanks.
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Old Aug 8, 2005 | 07:49 PM
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yep, the dowel pin gous into the different looking slot:

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