CX 2400 coolant leak
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  1. #1
    Fellow Frogger! doggiedog's Avatar
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    Default CX 2400 coolant leak

    Today I was listening around the engine for the annoying rattle at idle (in gear),
    around the timing cover, when I noticed a blob of coolant drip from the head area, onto the top of the timing cover. Looks like it has been leaking for a while.

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    Not having worked on alloy heads before, (I hate working with Alloy, I usually break ot strip things), I am a bit reluctant to just whip it off and put a new gasket in.
    Am I likely to find corrosion in the head, and need to find another head from somewhere?
    My other option would be to try Chemi-Weld, but with a new $600 radiator, Im a bit reluctant.
    My other option is to just try and retension the head, and see if it stops, the car was sitting for 7 years, and I've since done 15,000 kms in the last 7 months, possibly the gasket is just knackered.
    Also if I do take the head off, do I need to get it crack tested and surface ground?
    Thanks for any replies
    Attached Thumbnails Attached Thumbnails CX 2400 coolant leak-p2070054a.jpg  
    Terry


    1980 CX C-Matic Bleu Regate

  2. #2
    Real cars have hydraulics DoubleChevron's Avatar
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    Default

    If you follow the leak is it originating from the small hose that goes from the head to the base of the carby ??? This hose gets cracked with age and may leak around the clamps as it's simply so deteriated.

    I can't imagine a coolant leak from the area shown Is there an end plate on the head (I seem to recall there being one there) possibly this could just need a new gasket.

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    Shane L.
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  3. #3
    Fellow Frogger! doggiedog's Avatar
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    Default

    I'll check, but I saw the blob of coolant appear at the spot between the head and the block, then dribble off, I'll have to go over it with a fine toothed comb. I don't know about an end plate, I'll look.
    Thanks
    Terry


    1980 CX C-Matic Bleu Regate

  4. #4
    UFO
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    CitroŽn Tragic UFO's Avatar
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    I had a hard to find leak on the D recently. I was dead certain it was coming from the back of the block - there is some plate there - blah blah blah.

    However, the next day while waiting at the shops for Deb to grab something as we headed out in the D, I found the leak. It was a pipe that fed from the back of the waterpump to heat the carby. It was perished on an elbow.

    Point of this story is that all fluids can track a long way and make a leak "appear" where it isn't.

    I like Shane's suggestion.
    Craig K
    2009 C5 HDi Exclusive

  5. #5
    Too many posts! JohnW's Avatar
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    Quote Originally Posted by UFO
    I had a hard to find leak on the D recently. I was dead certain it was coming from the back of the block - there is some plate there - blah blah blah.

    However, the next day while waiting at the shops for Deb to grab something as we headed out in the D, I found the leak. It was a pipe that fed from the back of the waterpump to heat the carby. It was perished on an elbow.

    Point of this story is that all fluids can track a long way and make a leak "appear" where it isn't.

    I like Shane's suggestion.
    Agree with all comments. I'd add that coolant is amazingly good at bleeding at low rates through all sorts of gaskets. I have it coming through my copper-asbestos Renault 750 head gasket (small rate, 12 years!!!) and through Renault R8 water pump gasket (about 12 years too).

    Certainly my CX is dry at present.

    No doubt we'll hear where it is really coming from in time. Good luck.
    JohnW

    Renault 4CV 1950 (R1062)
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