Radiator Drain and Flush

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  • ChrisB
    Low Range
    • Dec 2007
    • 40
    #1

    Radiator Drain and Flush

    My IIA's control valve for the heater blew, and I am awaiting back-ordered part from our hosts to repair it. When I do, I want to drain and flush the radiator.

    Can y'all give any tips to a rookie on draining and flushing the system?

    Also, what type/brand of rad. fluid do you recommend?

    What mixture of fluid and water do you recommend? Winter temps in Birmingham, AL often dip below freezing and occasionally into the teens.

    Finally, I have a late IIA (1970). There is no "obvious" place for a heater control lever to go on the dashbooard. Prior to the valve going, I just opened bonnet and open/closed lever on valve assembly.

    FYI. I am running a 2.25L petrol.

    Thanks,

    Chris
    Tags: None
    • scott
      Overdrive
      • Oct 2006
      • 1226
      #2
      it was fairly easy on mine. i had to spay a little liquid wrench on the pepcock located bottom of radiator driver's side. i have a LHD
      '64 Series IIA 88 Canvas Tilt
      '68 Series IIA RHD Ambulance
      '76 Spitfire 1500
      '07 LR3 (Series Recovery Vehicle)

        Comment

        • greenmeanie
          Overdrive
          • Oct 2006
          • 1358
          #3
          The heater valve is controlled using a push/pull cable. It should be mounted in the same panel as the oil pressure gauge at about the 4 or 5 o'oclock position from said gauge.

          If it is missing there is a cable available from Checkers/Kraggen or whatever its called where you are that looks right and is the right length but very cheap.

          WHen routing it it pays to sleeve the top end in the engine bay with plastic or rubber hose to prevent it shorting out the coil. Yes, that was another duh moment for me.

          For the valve you will also probably need the adapter boss from the thermostat housign to the valve as this changed on the SIII from the original SIIA design. On the SIIA tere was a mounting bracket and a short piece of hose. On the SIII the bracket is deleted and a rigid boss RNC568 used instead.

          I hope this helps
          Gregor

            Comment

            • ChrisB
              Low Range
              • Dec 2007
              • 40
              #4
              Gregor:

              Thanks for the tips on both issues. I will look into the cable.

              It's actually the adapter - RNC568 - that is on back-order.

              I appreciate your help.

                Comment

                • Jim-ME
                  Overdrive
                  • Oct 2006
                  • 1379
                  #5
                  Can the short hose/bracket mounting on a 2a be replaced with the later adapter? Try Rovers Down South for the adapter if you are in a hurry.
                  Jim
                  Last edited by Jim-ME; 01-14-2008, 07:43 AM.

                    Comment

                    • greenmeanie
                      Overdrive
                      • Oct 2006
                      • 1358
                      #6
                      Originally posted by Jim-ME
                      Can the short hose/bracket mounting on a 2a be replaced with the later adapter? Jim
                      Yes

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