I bought this car some 3 months ago. Previous owner said he changed cambelt at 123000 km in 1997. He swears to me that it is true so I quess that is it. Now the car has 159000 km and it is 2003. So it is 36000 km, and 5 1/2 years on it, do I have to change cambelt or not? It is made by "Daiko" which is good brand. I opened cambelt cover and it looked good. A few times, when it was really cold it squaled for few seconds. What is recommended cambelt change intervals for Opel Kadett GSI 16V?