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Thread: Sealing a coolant sender unit

  
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    MPSMITH64's Avatar
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    Sealing a coolant sender unit

    Hi guys,
    Just a quick one, I have got to replace my coolant sender unit with a new one, and I was wondering if someone could please tell me what the best thing is I can buy to seal it with when I screw the new one into the side of the block, to stop it leaking..... Thanks for your help.

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    what year and engine?, they do not normally need sealant

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    Hi steve1412
    Sorry I should have said, its a 1.7 cdti van with a Z17DTL (ecotec) engine and the year is 2005......Thanks....

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    lee gsi's Avatar
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    You dont use sealer as the sender is tapered and when 'tight' its sealed.

    So dont ever tighten.
    The truth is always the truth even if you haven't realised it yet...

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    i have just done mine and altho the seal on the new unit should keep it sealed,i was taking no chances and used a small amount of clear sealant(which you can get in any car part diy store) around the seal on the new unit,and happy days no leaks .

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    should not need sealant then, but if you really want to then blue hylomar for water bourne areas

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    Thanks guys, for all your info......

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    lee gsi's Avatar
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    I take back what I said.

    Just bought a new one for Laura's car and it has a crushable metal washer on it.
    The truth is always the truth even if you haven't realised it yet...

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