Not usually. 55C is actually the upper limit of an average estimate. Source: My loop has my GPU at 50C under load
Anyways @Kodtys , cooler degradation can happen after variable periods of time, and is influenced by the cycling of temperatures etc. Might be just time to get a new one. As it is an issue that has procedurally been augmented, it safe to say it's not an issue with contact but degradation.