This is precisely why I loathe the typical aftermarket warranties dished up by used-car yards. They are written very carefully to cover the stuff that won’t go wrong, and not cover the things that typically do fail or break. It’s often been said that these warranties are not worth the paper they’re written on, and here’s proof yet again.

What does it matter if the engine failure was caused by a radiator that is blocked, broken, cracked or leaking? The bottom line is that a dud radiator (sold with the rest of the car) appears to have caused the car to overheat and destroy its engine. And yet the fine print of this warranty will allow the warranty company to wriggle out its responsibility to repair an engine it accepted money to cover. The ACCC should get involved in this grubby end of the car trade and sort it out. Now.

As for your friend, I’m not sure what can be done. Allowing somebody with the right legal background to read the warranty might be a good idea. But the used-car dealers who profit from these warranties know the fine print backwards. And I suspect that even if the blocked radiator exclusion hadn’t scuppered her warranty cover, the fact that a previous owner did his own servicing (and therefore, no stamped service book) would have been an alternative get-out for the warranty company. Actually, that’s a thought: If the service book wasn’t fully stamped, should the warranty have even been offered when the car was sold? I’d be asking that of the car-yard.

I’d also be asking who diagnosed the radiator as the problem. If your friend noticed coolant disappearing but not leaking on to the ground, I’d say that was more consistent with a blown head gasket – for which these early Carnivals were infamous. Find out if a blown head gasket is covered in the warranty. If it is, I’d be very suspicious about blaming the radiator. And yes, I’m absolutely suggesting that you’re potentially being lied to about the cause of the engine failure to move the official reason into an area not covered by the warranty. I reckon I’d be having the RACQ (which has a fair bit of clout in these matters) inspect the engine and rule on what caused the meltdown.

Meantime, forget about a $7000 engine. Find a parts recycler (we used to call them wrecking yards) that specialises in second-hand engines and get a good, tested, used engine fitted. Just make sure it doesn’t have the same head gasket problem.

THIS is a common problem with early Carnivals. Kia rebuilt engines when it was widespread, and I guess the engine in yours was rebuilt by the previous owner. I would be sure to have the engine rebuilt by someone who knows what they're doing so that hopefully it won't happen again.

KIA doesn't recommend fitting its cars with LPG. But if it is fitted, Kia will continue to honour the warranty, provided the fault or problem cannot be attributed to the LPG system. Some companies automatically void the entire warranty when an LPG system is fitted. You should talk to the installer about the warranty he offers and make sure you fully understand it. Generally, the installer must cover the LPG system components and the installation, leaving the carmaker to pick up the cover for the rest. If an engine problem arises a dispute can arise between the installer and the carmaker.