Q: 91 vw golf is overheating after hitting a curb. Took out thermostat just to check if that's the problem. Still overheating. Repla

If the suspension, alignment, or perhaps drive axle is damaged such that the engine becomes overloaded, the engine could overheat. Another possibility is an exhaust pipe was damaged creating a restriction. Normally, a collision won’t cause any of the "typical" faults that lead to overheating hence those novel suggestions. If, however, the overheating originates from the more usual causes, the ones to look for would be low coolant level (including that due to leaks), a faulty thermostat, a plugged radiator, a faulty radiator pressure cap, collapsed hoses, non functioning cooling fans, and a faulty water pump or drive belt. Certain engine faults, such as a leaking head gasket, poor engine running condition or exhaust blockages can also cause overheating. An important thing to keep in mind is once an engine has overheated, you should replace your engine cooling thermostat because episodes of overheating can damage the thermostat. If the thermostat is damaged, and left in place, that can set the stage for future cooling system problems. If you desire that this overheating problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine overheating diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.