I took the car down to have the radiator flushed but the mechanics refused to do it because they say I have a couple of leaks in the head gasket and intake valve gasket.
First off, what is the intake valve gasket and where is this located?
Second, the temperature in the car gets a little over 200 during the warm months but not even close to 140 during the winter months.
Third, the reservoir tank overflows. I checked the hoses to the radiator and they are flexible. Problem is, I can squeeze them and it sounds like air being pumped into the reservoir. Does this mean that the thermostat is not working properly or not?
Finally, I have seen some oil in the reservoir tank. What is the sign for that?