e46 Cooling system replacement

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  1. e46 Cooling system replacement
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    thumbitin's Car Details
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    Alright guys,

    I have a e46 325 sport, about to have its service II. Its just done 70k.

    While its there I was wondering if its worth having the cooling system replaced as it seems they can be a weak point at this mileage? Apparently the hoses can start to go brittle and can leak and also the pump could do with a replacement with the metal rather than plastic propeller pump?

    Are they any kits off the shelf you can buy? Its seems there are in the US but not over here. I would rather do the whole system rather than having to do bits here and there.

    Not a problem if I have to buy the parts individually, just easier to do it in one.

    Anyway, thanks in advance.

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  3. #2
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    izzy_007's Car Details
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    Tbh I would have the radiator inspected to see if it is likely to mess up. It usually starts to bow. Otherwise I would just leave it

  4. #3
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    Just stick to replacing the anti-freeze every two or three years and most things should be fine for many more miles. Coolant systems are a bit like the engine block itself, change the fluids regularly with a quality product and it will serve you well

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    As stated above, the rad needs close inspection. After 8-9 years they are either about to go pop or are on their last legs. Get either a Behr or Nissens, but avoid the nasty 60-80 quid ones as they're crap. The clip fit hoses last well as does the much maligned plastic impeller pump, but a new KWP steel impeller pump is only 30 quid. A pump, rad and maybe a header tank, new antifreeze and replace the drivebelt.

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    the cheaper one arent crap, the fitting might require some aligning but they are perfectly fine. a lot of people skimp on stuff thinking its rubbish but that isnt always the case

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    Quote Originally Posted by Brimstone View Post
    After 8-9 years they are either about to go pop or are on their last legs
    Broad statement, the radiator on my 8 year old E46 was fine, no rust, not breaking apart at the bottom

  10. #7
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    Quote Originally Posted by matthew_henson View Post
    Broad statement, the radiator on my 8 year old E46 was fine, no rust, not breaking apart at the bottom

    Plenty of them have though - and being aluminium/plastic, rust isn't really an issue.

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