Don't fancy a £5000 bill for a new engine?, before you commit why not try Irontite. I had a common porous block syndrome on my 4.6 HSE and was facing such a bill.

This product cures most hairline cracks in engine blocks and heads, without the need to strip out the engine and re-build it. This product works on all water cooled engines cast or aluminum.

It's very easy to use, all you need to do is add it to clean water in the system, no anti-freeze, this is very important. Completely flush your system first, then just add Irontite (full instructions are on the bottle). You drive around for a couple of days to allow Irontite to find its way into all areas of the engine, then you need to drain the water out completely and leave overnight, this allows the Irontite to harden into a ceramic seal. You can then fill up with your usual water/anti-freeze mix.

Unlike other products this is a permanent repair and does not need to be re-done if you change your coolant. It is ceramic based and so can withstand the heat and stresses of a modern engine.

1 bottle treats up to 23 litres.