My friend's Jetta is overheating, the top radiator hose is hot and the lower is cold. Heater blows cold. I'm almost certain it is the thermostat.
Unfortunately, every time I look for a guide, the pics are different. Were it my car, I would just mess with it, but it isnt and I want to get it right first. Is it where the top radiator hose meets a plastic housing with an electrical connection? This is on the driver's side of the engine block and the top radiator hose enters it, and the heater hose leaves it.
If anyone has any tips on how to do this or things to look out for, please let me know.
Thanks in advance.