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  • Additional coolant flow, SR head

    Anybody ever seen anybody put an additional -6 or so coolant vent on the rear of an SR head to promote more cooling to the rear cylinders?

    Been contemplating it lately.
    '18 Chevrolet Volt - Electric fun hatch for DD duty!


    DefSport Koni Sleeve and Spring Perch Buy!!!
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  • #2
    i saw on this article for a ka24de a long time ago. they had it for a different purpose though.



    Although there's a port on the front water neck, which can be connected to an air separator tank, we opted to incorporate Auto Staff's water bypass block. This provides an additional source to remove any trapped cavitations in the cooling system.
    http://www.superstreetonline.com/how...a24de-buildup/

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    • #3
      It does help remove trapped air as well, and I'd likely return it to a surge tank for that purpose. But it also promotes flow to the rear of the cylinder head where it does tend to stagnate a bit. ive seen some newer engines with plastic block inserts that would encourage coolant flow up to the head. I figure kind of the same thing.

      One issue is knowing how far up the coolant port goes in the head. And where to drill exactly. Hmmm. Maybe I'll experiment with it. I can always plug/weld it up if it's a no go.
      '18 Chevrolet Volt - Electric fun hatch for DD duty!


      DefSport Koni Sleeve and Spring Perch Buy!!!
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      • #4
        Are there freeze out plugs on the backside of the sr20 head?

        I can't find a pic of a sr20 head on the back side. It only shows pics of the inside or of the ports

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        • #5
          I don't think there are freeze plugs on the back. I'll go check my VE head later though. It has "freeze plugs" for the rocker shafts.
          '18 Chevrolet Volt - Electric fun hatch for DD duty!


          DefSport Koni Sleeve and Spring Perch Buy!!!
          http://www.nissanroadracing.com/showthread.php?t=5902

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          • #6
            if there is a freeze plug for coolant i was going to say you should fab something that can be put in the whole for the sr20 community

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            • #7
              The VE oil solenoid blocks most the back of the head. Don't think I'd be hitting a coolant passage - so no drilling for me. Maybe a DET head is a better option for this.
              '18 Chevrolet Volt - Electric fun hatch for DD duty!


              DefSport Koni Sleeve and Spring Perch Buy!!!
              http://www.nissanroadracing.com/showthread.php?t=5902

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