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Undefined array key "userid" in .../vb/library/user.php on line 1594 Warning: Undefined array key "lastactivity" in .../vb/library/user.php on line 1610 Warning: Undefined array key "userid" in .../vb/api/user.php on line 6480 Warning: Undefined array key "userid" in .../vb/api/user.php on line 204 Warning: Undefined array key "privacy_options" in .../vb/api/user.php on line 246 Warning: Undefined array key "userid" in .../vb/library/user.php on line 5342 Warning: Undefined array key "userid" in .../vb/library/user.php on line 1594 Warning: Undefined array key "lastactivity" in .../vb/library/user.php on line 1610 What are the differences in 1969 3927186 heads? - NCRS Discussion Boards

What are the differences in 1969 3927186 heads?

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  • Allen N.
    • Today

    What are the differences in 1969 3927186 heads?

    I need to replace the heads on my wife's 1969 L-46 with the correct 3927186 heads. I find a lot of these heads off Camaros for sale. Are all 2.02/1.60 3927186 heads the same? If not, how do you tell the difference?
  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43193

    #2
    Re: What are the differences in 1969 3927186 heads

    Allen-----

    All 2.02/1.60 valve size GM casting #3927186 heads are the same (except for "dates", of course). However, not all GM casting #3927186 heads have 2.02/1.60 valve size. Many were made with 1.94/1.50 valve size. Externally, when the heads are mounted on an engine, you can't tell the difference between the "large" and "small" valve '186' heads. However, when you're shopping for a set of heads, as you are, which are off the engine, it's easy to tell the difference-----just measure the size of the valve heads.
    In Appreciation of John Hinckley

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    • Allen N.
      • Today

      #3
      Re: What are the differences in 1969 3927186 heads

      Joe,

      Thanks, you are a great asset to the NCRS community.

      Allen

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