Please help with this madness.got the headgasket done on my mg zr 3months ago.it just blew a days ago.I paid £550 to this garage to fix.now its gone just can't believe it.should repairing a crack be included in that price.the oil is proper cream.it still drives.as well the guy that done it said after head gasket is done it needs3-4 oil changes is that right.should it go with in months of getting it done.please could someone help me.

Why was the original replaced did it leak internally as well? If that answer is yes then I would have sent the head to a machine shop for inspection and the garage should have done this in my opinion. As far as the price Im not sure but they should have mentioned in the work order whether it was inspected. If they knew it was cracked then the whole head should have been replaced. Just the way I think it should be done. I have replaced heads and rebuilt some American engines and I almost always send the heads off to be cleaned and inspected.