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

LT1 Valve Cover orentation question

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Old Dec 31, 2024 | 12:54 PM
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Default LT1 Valve Cover orentation question

Are the LT1's center bolt valve covers directional? I.E. is there a up and down? The passenger side has the PCV hose connection towards the firewall but I was wondering if the driver side could flip upside down. The pattern in the ribs has always looked backwards to me.


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Old Jan 1, 2025 | 06:25 PM
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There is not a directional bolt pattern. OEM valve covers have drippers molded into top side that should be over rocker arm nuts. The PCV vent hose hole is on passenger side. Picture appears to be aftermarket covers
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Old Jan 2, 2025 | 07:31 AM
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Valve cover in pictures is the LH '92 LT1 only....ribs towards the front of the engine is correct👍
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Old Jan 4, 2025 | 12:12 PM
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I cant speak for the factory valve covers, but i know my aftermarket valve covers (which of course had to be modified for the alternator setback) do indeed have a ‘what side is up/down orientation ‘ matters

the drip tabs in them around the center bolt guides are longer on one side vs. the other

so the tabs wont clear my aftermarket 1.7:1 rockers if you try to install it upside down


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