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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

O-ring on shaft of opti for 93-94 LT1?

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Old 11-01-2010, 01:19 PM
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Default O-ring on shaft of opti for 93-94 LT1?
im trying to help a friend rebuild his lt1 and i cant remeber if there is an o-ring that goes on the shaft of the opti his is a 93 thanks for any help
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Old 11-01-2010, 07:32 PM
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No theres no O-ring, Just a seal on the back of the opti and another in the timming cover.
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Old 11-01-2010, 08:09 PM
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Concur. No o-ring for opti. There is an o-ring for the water pump though.
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Old 11-01-2010, 09:04 PM
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Its a seal, I think its not sold separately, it comes with the timing gasket set.
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Old 11-01-2010, 09:57 PM
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Originally Posted by Speedy
Concur. No o-ring for opti. There is an o-ring for the water pump though.
Are you sure? I don't remember ever seeing an O-ring for the WP.
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Old 11-01-2010, 11:09 PM
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there is at least one o-ring on the splined shaft cause im in the middle of a rebuild.I check to see exactly where it is tomorrow.
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Old 11-02-2010, 06:31 AM
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The o-rings on the water pump drive (on both ends) are not for sealing, they are for dampening. Any conventional o-ring will work as long as the coupler fits snug over it.
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Old 11-02-2010, 07:13 PM
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Originally Posted by airfix
Are you sure? I don't remember ever seeing an O-ring for the WP.
Absolutely sure. What WRD72 said. And seal for opti, no O-ring like you said. Careful not to lose or damage the little spring on the opti seal.
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