What year did GM go to center bolt valve covers?
GM Genuine Parts 12631008 Engine Valve Cover
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Open Apr 12, 2025 - 07:38 AM
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Apr 12, 2025 - 07:38 AM
General Motors (GM) introduced center bolt valve covers with the launch of their redesigned small-block V8 engine in 1987. This change was part of the transition to the new generation of engines, known as the L98 in the Corvette and other vehicles. The center bolt design provided improved sealing and reduced the likelihood of oil leaks compared to the previous perimeter bolt design.
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GM Genuine Parts 12631008 Engine Valve Cover
This GM Engine Valve Cover is an original and genuine part. It is made to fit your Chevrolet Colorado or Suburban, and has a 12 19631008 stamped on it. This Valve Cover covers the opening at the front of your engine for protection from debris and wear.
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