Z32 Coolant leak drivers side

Discussion in 'Technical' started by TordeK, Jun 5, 2021.

  1. TordeK

    TordeK Member

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    Just found a coolant leak on new zed. Appears to be coming from drivers side foot well / centre area… am I right in suspecting heater core?

    video of leak
     
  2. IB

    IB ?????

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    Heater core has sprung a leak.

    Short term fix is to bypass the heater core by using a J shaped heater hose to join the two heater hard pipes at the back of the engine.

    Proper fix is to replace the heater core.
     
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  3. MickW

    MickW Carntry member...

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    I agree with IB about 96 % :)
    In my case it was the valve for the heater core that was leaking. Good idea to replace both as you go.

    According to an old old thread, a hose from an EA Falcon will do for the bypass. Part number ED18472G
    I just used a generic curved hose from Supercheap. It was too long but your mates Stanley, Wiltshire, or Ginsu will help you sort that.
    And guys, when you think it through - you could just plug / cap off the heater core supply hard pipes at the back of the engine. The heater core has a valve which stops flow between those hard pipes until it's needed in the heater core anyway. It's not like you'll be compromising your cooling system by closing that flow path at the hard pipes. As in, you don't need to use a bypass hose. You should be fine to just cap them.
     
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  4. rob260

    rob260 Moderator Staff Member

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    Capping the heater pipes isn’t a good idea as the rubber deteriorates very quickly when in contact with ethyl glycol. Bypass is better.

    I have heater cores in stock (website link in signature) if you decide to go that way.
     
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  5. TordeK

    TordeK Member

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    I have a spare brand new heater core from a group buy back in 07 or 08 or something lol… might just take the opportunity to replace and and fix up the lifting dash at the same time… and the Speedo not working. Was going to take it for a run to drive over 140 to see if the speedo fixed itself but noticed water on my feet while warming her up…

    what’s the valve you speak of to replace at the same time as the core? Is there any other hoses I should replace at the same time as the core?
     
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