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

Front crank seal leaking

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Old Jul 20, 2018 | 11:31 AM
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Default Front crank seal leaking

On my 96 LT4, I noticed light oil on the bottom of the front oil pan and the crank sensor connector is covered with oil. Looks like the crank seal has a small leak. There are no oil drips on the ground. Should I replace the seal now or wait till it gets worse, like when it starts dripping on the floor?

Last edited by turbobuick33; Jul 20, 2018 at 11:32 AM.
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Old Jul 20, 2018 | 01:37 PM
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Originally Posted by turbobuick33
On my 96 LT4, I noticed light oil on the bottom of the front oil pan and the crank sensor connector is covered with oil. Looks like the crank seal has a small leak. There are no oil drips on the ground. Should I replace the seal now or wait till it gets worse, like when it starts dripping on the floor?
Remember that timing chain cover has three seals; do them all at once.
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Old Jul 20, 2018 | 04:28 PM
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Can also be the crank sensor o-ring.
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Old Jul 21, 2018 | 05:57 AM
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It could be the crank sensor o-ring. The opti-spark and water pump was replaced a few thousand miles ago. I assume the timing cover seals were replaced but not sure.

Last edited by turbobuick33; Jul 21, 2018 at 06:04 AM.
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Old Jul 21, 2018 | 07:37 AM
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That barely even qualifies as a leak.
Clean it off with brakeclean and then reinspect it at the next oil change.
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