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K-Series Radiator


SPW

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I need a new radiator for my 1.6K series and having read through several previous threads on radiators it seems there are a lot of issues with leaking aluminium radiators, particularly from Caterham. I'm leaning towards a Radtec replacement from what I've read but would welcome any thoughts, positive or otherwise on Radtec or any other possible options.

If anyone has a decent original copper radiator they want to sell please let me know as would also consider a direct replacement.

Steve

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Radtech are excellent, great customer service too.  Just make sure you use blue coolant, I experienced two rounds of leaks using orange over the course of two years. Radtech offered service exchange and repairs even paid for the shipping at their cost. Zero issues since switching to a blue coloured product.   

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Thanks for the feedback. Just ordered from Radtec, had the "which coolant" discussion, recommend blue as expected but red won't invalidate warranty apparently.  Seems to be a can of worms having read the various threads highlighted by JK and their explanation seemed more based on anecdotal evidence of its impact on the brazed joints rather than anything more scientific. Will have another read of the coolant threads after a couple of wines tonight!

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The other thing to watch out for with Radtecs is to fit them square, without any twisting. They don’t like it and leak. Basically, when you mount it to the mounting brackets, use washers to shim the fit, as the brackets are unlikely to be perfectly square.
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