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  1. P

    3.0l replacement head

    your opinion noted
  2. P

    3.0l replacement head

    HEllo; Ok, so corrected on Gm part being made by Gm. 1988 3.0. However, through Mercruiser help. with the serial number that I have, indicates the engine is from 70's sometime. I bought 8m0115134. We discussed cutting down the rocker stud towers as the height difference is the dimension of the...
  3. P

    3.0l replacement head

    Mercruiser has made a new head (8m0115134) for 3.0l. Modernized to work with new fuels , hardened valve seats, s/s valves, screw in rocker studs. Really cool! HOWEVER, the screw in studs set the rockers higher than the oem head. This makes the pushrods too short(34532) What is the new...
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