Nissan Sentra 2000 motor problem

Hello, I tell you, take the car to the workshop, they checked it with the scan and all good, the problem lies in the spark plugs as I know, since my car still has them as a factory had never changed them, two are broken one this pejada and the other burned, they had it for 2 days in workshop to be able to repair it, and I get very

expensive

Two days for a rare Mmmmmmm Mmmmm spark plugs, you take half an hour at most.

Hello thank you for your comments,,

what happens is that two spark plugs were broken when they took them out and the thread was inside one of them is stuck and the other came out problems, then the mechanic that must disarm everything told me to get the part that I stay inside ,, I saw them and if they were broken, but I do not know if I want to see my faulty face hehehe

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If it was not like that, and I began to vibrate from the change of the band, it is most likely that it has not been well synchronized, and some valve has been bent, so it is expensive, very careful friend, maybe the spark plugs is just a hoax, since they are changed in 5 minutes, and taking a broken spark plug, it is not great science, very careful