Rajadura in the engine head

Friends I continue with records discomfort at the Nissan Xtrail, which disappointment of car, they just mentioned that it has disarmed the engine again because it continues with damage, they have told me that the motor is probably the engine of the engine has a trizmature, they have taken it to the rectifier to do a test, I feel demoralized, why do you break the head of an engine? Is there somewhat way of repairing this crack and that is good? I do not know I feel very bad about what happened.

I request your collaboration, thanks

Friend the head or cylinder head, can be tried by sudden warming or as a manufacturing failure, apart from blows and molten of obvious motor, there is a pressure test, which is called hydraulic test, this determines some fissure of the cylinder head, there is also a repair, they enter and they are well no problem with that.

IVAN ESTIMATED:
Fizura in the cylinder head is because it has suffered a series of warm

Thank you friend, indeed as you say the car is prescaled as I indicate in the forum, Nissan Xtrail 2003 and just my birthday, went out they say for security, I waited for a moment and turned it out for it, I had refrigerant on the deposit, I walk more or less one 30 km. And I got off again, I waited rhrigrant, what I did not see is if there was oil, or verified if I had liquidated on the radiator, walk to Nissan and they told me that they would check it, the next day they gave me the report towards 18 months through they repaired it, to the Ochpo months of those entered and changed the radiator, that October 2010, I bought it in April 2011, I bought it in April 2011, I bought it in April. km. Until July 11. The mechanic that helps me out of Nissan disarm the engine and told me that the block package had burned and that is why it is pressed, I buy the original, from which the block is brushed and I do not know if the head or cover the block (apologize the ignorance for not knowing what it is), armo it last week and I was trying it, today they have told me that they have told me again. Proque is supposed to be a crack in the head and that they take him to the rectifier to do tests and see what happens, so far that they are today's 13ho I have no answer, I am demotivated and thanks for your support. As I tell you, I don't know anything about a mechanic and how little it is empirical, my question is, is the repair very well, with which they weld, there is a risk of losing the investment? Thank you all for your support and knowledge