Thank you all for your replies.
We have tried comparing it with the other parameters and everything seemed normal it was just the EGT that was abnormal which is why it seemed rather mysterious.
However upon another compressor wash the problem dissapeared, exceedance value was 30 to 40 C, I'm assuming that there was some impurity inside the engine that the B1 guys failed to see, which was causing the problem.
Anyways Thank you all once more, I appreciate your help.