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

URGENT need info on OPIT !!!!!!

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Old Aug 16, 2007 | 05:26 PM
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Default URGENT need info on OPIT !!!!!!

I need to know which of these holes do i need to place the little pin in????

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Old Aug 16, 2007 | 05:35 PM
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It will only go in one. I vote for the one at 4 o'clock.

If you had the engine at TDC when you removed it, the pin will be at 9 o'clock on the camshaft. Align the distributor driveshaft slot with the base timing mark and it should line up.

Last edited by InHot; Aug 16, 2007 at 05:40 PM.
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Old Aug 16, 2007 | 05:39 PM
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Originally Posted by InHot
It will only go in one. I vote for the one at 4 o'clock.

If you had the engine at TDC when you removed it, the pin will be at 9 o'clock on the camshaft. Align the distributor slot with the base timing mark and it should line up.

I agree.
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Old Aug 16, 2007 | 05:40 PM
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so yall are voting on the one at 4oclock..
and i ment to say opti
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Old Aug 16, 2007 | 06:45 PM
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Who the heck is OPIT!!??!! Never heard of him!! ( Or is it a her...)
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Old Aug 16, 2007 | 08:18 PM
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Originally Posted by joebuck
so yall are voting on the one at 4oclock..
and i ment to say opti
I am!
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Old Aug 16, 2007 | 08:39 PM
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It will only go one way. This shouldn't be a poll! Good luck with it!
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Old Aug 16, 2007 | 09:14 PM
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yup... one way...
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Old Aug 16, 2007 | 11:14 PM
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The hole that is different from the other two holes. As others have said, in this photo it's the one at 4 o'clock.

Be well,

SJW
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Old Aug 17, 2007 | 01:48 AM
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well it wasnt the one that was different than the other two... i just put it all back to gether and it backfired.. and didnt run ... so looks like my golf game has to be canceled 4 tomorrow
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Old Aug 17, 2007 | 07:52 AM
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Default Difference

What does the 92 LT opti.(splined shaft) look like and how does it line up???
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Old Aug 17, 2007 | 11:05 AM
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The 92 driveshaft has one larger spline on each end of the shaft. It can only go into the cam or the opti in one position.
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Old Aug 17, 2007 | 04:44 PM
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Originally Posted by joebuck
well it wasnt the one that was different than the other two... i just put it all back to gether and it backfired.. and didnt run ... so looks like my golf game has to be canceled 4 tomorrow
Sorry about the golf game but that was the right slot, so something else may be going on. Crossed plug wires? Bad component?
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Old Aug 17, 2007 | 04:47 PM
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Originally Posted by ROB502
What does the 92 LT opti.(splined shaft) look like and how does it line up???
As already stated the early opti will only fit (should only fit) on the shaft one way.
late model
early model



Last edited by aboatguy; Aug 17, 2007 at 05:26 PM.
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Old Aug 17, 2007 | 05:24 PM
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The 4' o clock position that has the notch. That is how I did my '95 T/A and never had a problem.
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Old Aug 17, 2007 | 07:15 PM
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Originally Posted by Road Agent
It will only go one way. This shouldn't be a poll! Good luck with it!
On the GenI you are right, on the GenII you are wrong. The GenII can be installed off time, I learned that the hard way. They seem to line up, bolt right on but can be installed wrong. Correctly aligned is as stated above, plus you should hear or feel a little 'pop' when they seat properly.
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Old Aug 18, 2007 | 11:08 AM
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Originally Posted by aminnich
On the GenI you are right, on the GenII you are wrong. The GenII can be installed off time, I learned that the hard way. They seem to line up, bolt right on but can be installed wrong. Correctly aligned is as stated above, plus you should hear or feel a little 'pop' when they seat properly.
Again, it will only go together one way. You may be able to force it but only one way will it "pop" together. You can also force a Gen 1 together incorrectly.
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