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Compression Check Specs

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Waxer, Mar 7, 2000.

  1. Waxer

    Waxer 1/2 ton status Author

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    Location:
    Long Beach, CA.
    I'm about to do a Compression check on my motor to see what kind of condition it is in. Does anyone know what psi the cylinders should be at? It is a 350 in my 74 K5. HEI ignition. Thanks in advance

    <img src="http://www.geocities.com/waxerk5/waxsk5.jpg"
     
  2. mike race

    mike race 1/2 ton status

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    Location:
    Orlando, Fl
    i was told 160psi +- 10-15

    k5 broke but not dead
     
  3. White Knight

    White Knight 1/2 ton status

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    Location:
    Ft Worth,Texas
    Haynes says 150 psi-8 cylinder, 130 psi- 6 cylinder, with a maximum variation between cylinders of 20 psi...WK
     

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