Your valves have probably tightened, rocker cover off get the feeler gauges out and check clearences.. Im in the middle of this problem at the moment
Just to add my compression was down on 3 cylinders with my valves being too tight, got them shimmed and the car ran a bit better but it still was hunting and white smoke etc, compression still the same though..
Just to add my compression was down on 3 cylinders with my valves being too tight, got them shimmed and the car ran a bit better but it still was hunting and white smoke etc, compression still the same though..