307 coolant leak
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Thread: 307 coolant leak

  1. #1
    Fellow Frogger!
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    Default 307 coolant leak

    My wife's 307 sedan- petrol, manual-is losing coolant. I topped it up tp the correct level,bled it and took it for a long run then parked it and waited -not a drop! But after standing over night there was a puddle underneath again. There seems to be some signs of leakage around the back of the water pump but its hard to see without removing the battery.Any ideas? Am I looking at a new water pump?

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  2. #2
    1000+ Posts driven's Avatar
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    check to see if coolant coming from weep hole in water pump, underneath
    Will run down water pump casing
    It so water pump probably on way out.
    Change timing belts at same time.
    Normally change water pump at timing belt changes
    jo proffi, JohnW and tazfrog like this.

  3. #3
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    Battery and water pump are well separated. Which engine is this? Is it wet on top of the gearbox?

  4. #4
    Too many posts! JohnW's Avatar
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    The 306 engines are prone to thermostat housing warpage and leakage. May not be relevant of course but no-one's mentioned it. Just a thought.
    JohnW

    Renault 4CV 1951
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    Renault Scenic 2005 (wife's)
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    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

  5. #5
    Fellow Frogger! dmccurtayne's Avatar
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    Heater core isnít leaking and coming out the ac drain pretty common on petrols

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