[LeftOverParts]

Similarly, you could check your oil (dipstick on the left as you look at the engine, low one on the right is transmission) It should be amber if new oil or brown if older. Should not have gobules of oil and water mix.

There is a plastic pan under the engine so take a flashlight and look down with the hood open under the radiator and left side (as you look at the engine) to see if it looks wet.

Also check your carpet both front and middle seats along the center console, and front corners where your feet normally go for dampness in case it?s leaking on the inside from the heater cores. You might have to lift the mats and press down. If dry and there is no coolant smell in the car, you can probabaly rule that out.

Good luck.

 

[LeftOverParts]

Re no heat, also remembered that my 06 X has a heater valve that diverts coolant to the heater core. I believe the 01 X has one too. It is controlled from the cabin with a cable. It could be stuck and/or the cable could be stuck or broken. Picture attached shows where it is on an 06. Basically, look behind the engine on the fire wall about halfway down, passenger side, where the coolant hoses enter the cabin.

To check if the valve is working, it's easier if one person looked at the valve while another person was in the cabin and changed the heater temp from cold to hot and back, (key in position II). You might have to start the engine and then be very mindful and careful of the rotating/moving pulleys and belts. You should see the valve arm where the cable is connected move back and forth. The picture is when the temp was set to 75F. When the temp is set on "Low", the valve arm swings counter-clockwise to approx 3 o'clock. If the cable or arm isn't moving, when the engine is COLD and OFF, you could reach back there and try turning the arm by hand to the hot position, then start the engine, and check when it warms-up if the heater blows warm air.

To your question on the timing belt change affecting the transmission shifting, it should not. If coolant is in your trans, it could affect the shift quality and be damaging the trans.