Overheating after coolant crossover replacement

Discussion in 'LR4' started by Turley, Aug 31, 2018.

  1. Turley

    Turley New Member

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    2010 Lr4 140K

    So I replaced my coolant cross over pipe today under the manifold. Hooked everything up. Took it on the street I live on. No leaks, it just says it's running hot. And shows a high temp.

    1. Air pocket?

    2. Thermostat?

    3. Or something else.
     
  2. TheWidup

    TheWidup Full Access Member

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    Did you bleed the system? That's probably the source .
     
  3. Turley

    Turley New Member

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    I have not. Honestly not 100% sure how to do that. Any advice?
     
  4. TheWidup

    TheWidup Full Access Member

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    I think there's a bleeder valve on top of the reserve tank but I've never done it. From what i poked around and found it sounds like trapped air is a complete pain in these systems and hard to eradicate.
     
  5. Quijote

    Quijote Full Access Member

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    That has to be it.

    It can be a PITA to fully drain it and fully purge it. The key thing to remember is to start the engine to get the thermostat to allow coolant into the engine. Otherwise it will look like you filled it up but you are missing a lot of coolant.

    I'm sure you all know this, but just in case:

    https://www.google.com/search?q=pur...kQ_AUICSgA&biw=1536&bih=728&dpr=2.5#kpvalbx=1

    Even then, when I did my wife's Mini, the must have still been some air trapped because for several days after driving I would see the coolant level drop a little and had to top it off.
     
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  6. ktm525

    ktm525 Full Access Member

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    I believe there is also an air purge one of the hoses.
     
  7. Turley

    Turley New Member

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    She is up and running. Trapped air was the fix. Also ran a can of sea foam through her to make her feel good about her new plastic she gets to work on destroying.

    The two rings beside it, is where it broke.

    3BC94995-76CC-4708-B46A-D75EA162D503.jpeg
     
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  8. Quijote

    Quijote Full Access Member

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    Glad to hear it. Thanks for the photo.
     
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  9. Ric in Richmond

    Ric in Richmond Active Member

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    Exactly like mine. Clearly a product defect. I would go so far to say replace this pipe ANYTIME the manifold is off for any reason.
     
  10. BikePilot

    BikePilot Active Member

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    Is there not an updated version that solves the problem? Porsche had a fit of insanity and speced plastic cross over pipes on cayennes initially but then when they failed the replacement parts are metal and seem to have put a stop to the failure for good. I'd have hoped that rover would do something similar. If not maybe an adtermaafte supplier could fill the void.
     

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