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

Dist Timing-1987 C4

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Old Oct 3, 2011 | 10:32 PM
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Default Dist Timing-1987 C4

What is the intial timing for the dist on a C4 (1987)? All the service manual says is "per the sticker on the radiator cover", which has long since gone.
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Old Oct 3, 2011 | 10:47 PM
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6 degrees with EST (timing ) connector disconnected
Don't forget to reconnect after adjusting timing
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Old Oct 4, 2011 | 12:05 AM
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Many of the early C4's have experienced timing mark movement on the dampeners.

You might consider checking TDC on the marks if your timing seems off.

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Old Oct 4, 2011 | 05:41 PM
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Originally Posted by rodj
6 degrees with EST (timing ) connector disconnected
Don't forget to reconnect after adjusting timing
If my FSM is correct you will also need to clear the code set by disconnecting the EST.
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