And the point here is: "If it sounds too good to be true, it probably is!"
Joe
Richard B Gosling wrote:
>
> You may recall, a couple of months ago, I posted a message saying that,
>despite
> my scepticism, I had had a positive experience with a 'Magic Cure In A
> Bottle', in this case a cylinder block crack healer. Here is the updated
>(and
> less happy) story.
>
> The Magic Cure did exactly what it said it would do, after I followed the
> instructions on the back. I added the product to pure water in the coolant
> system, left it in for 3 days normal driving (with the thermostat removed),
> then drained the coolant system and re-filled with normal coolant. The block
> no longer leaked - I had been adding about a pint of water every day or two
> before then. (This was on my wife's Citroen, not Daffy, but the message is
> universal).
>
> All was well for several weeks. Then, my wife had to start topping up the
> coolant again, first a little, then more often. She is now adding a pint or
> two almost every day. The 'Magic Cure' did stop the leak, but only
> temporarily. I work in engine design, specifically analysing the structural
> strength of engines, so I can theorise here a little (but this is NOT gospel,
> just my guess-work...). Cracks don't just develop and then stop after a
> while, they usually keep spreading and growing until they get somewhere -
> either a significant change in the cross-section of the metal, or the other
> side of it. So, the 'Magic Cure' may well have blocked the existing crack,
> but it did not stop it growing, and soon the leak was back again.
>
> At this stage I could use the product again, and hope that it would plug the
> new, enlarged crack. However, my wife is fed up with the car, and it is
> getting on a bit, so we are trading it in. If the AA inspection goes OK, in
>a
> couple of days we will have a new (well, '89) Audi 100 Avant Quattro to play
> with! 2.2 litre 5-cylinder, 4WD, should be a bit more fun than the 1.4
> Citroen BX...
>
> My scepticism with 'Magic Cures in a Bottle' is renewed with vigour...
>
> Richard & Daffy
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