c3 hdi engine sound problem

hi 2003 model c3 hdi sx there is 92 hp. There is no problem when the engine starts up. When the heat goes a little bit, the oil lamp lights up and the engine is running very loud. The trigger set has just changed

First of all, welcome to us. have the oil cooler checked. Look at the sentence setting again. Of course, before that, I have a question before the timing change.