Ever since I've had my cambelt and water pump done (bout three months ago) the temperature gauge takes a lot longer to reach half way (90) and if for instance I'm sitting in traffic it will drop to below the quarter mark, and much quicker if I have the blower on. I used to warm the car up about 10 mins before I left for work and it would nearly be at 90 but now after 10mins it's not even registering, and now it will never heat up to 90 on idle, I would need to drive it for at least 10-15mins for it to warm up properly.
Before the cambelt and water pump for instance If I drove to work (20 minute drive) gauge would have got to 90 and if I sat there and left it idling it would stay at 90.
Now it will get to 90 by the time I get to work but if I sat there on idle it would gradually make it's way down to below the quarter mark? I'm not very mechanically minded at all, thermostat or sensor maybe? anyone ever had this before?