Transmission Fluid. Many cars have a transmission cooler built into the radiator to cool the transmission fluid. Sometimes there is an internal rupture in the system spilling transmission fluid into the radiator thus mixing with the coolant.
When your car smells like the engine is hot, is the engine hot? If it smells hot and the engine is not hot, then you have coolant escaping onto a hot surface. You may have bad radiator hoses, a leaky radiator, a blown gasket, or some other problem. You need to find the leak.
A cracked head.
There are basically 2 causes. One cause is condensation which is normal. This is the hot exhaust hitting the cold parts causing water to accumulate. It goes away after the system warms up. The other cause is a blown head gasket which is very serious. If the water smells and taste sweet, it is coolant and you have a blown head gasket. Stop driving the car immediately and have it repaired. Other signs of a blown head gasket are coolant in the oil, air bubbles coming from the radiator inlet with the cap off.
If it is loosing coolant, it is either leaking or you have a blown head gasket. You say it is not leaking or burning it. Sorry, but you are incorrect. It is doing one or the other. Sometimes a leak can be in a location where the coolant evaporates before hitting the ground. Check you oil for the presence of coolant. Smell the tailpipe, if it smells sweet, you have a blown head gasket. Remove the radiator cap and start the cold engine. Watch and if you see bubbles, blown gasket. Feel underneath the water pump at the weep hole. If you feel coolant, bad pump.
Have a 94 Honda Civic LX. Radiator develope a hole and overheated the engine. Dealer quoted price of $1900 to replace cylinder head gasket, valve covers, timing belts, water pump (other things as well). Plus replace radiator. Cost includes sending out gasket for surfacing.
Other than a leak, a blown head gasket. Very serious, so stop driving until this is repaired if you suspect a blown head gasket. Serious engine damage will occur.Other than a leak, a blown head gasket. Very serious, so stop driving until this is repaired if you suspect a blown head gasket. Serious engine damage will occur.
Remove the head and replace the gasket. No other way to fix it.
You must replace the defective gasket. There is no other permanent fix.
If fumes are coming into a car it is most likely not going to be coming from a head gasket. The more likely places will be a blown exhaust gasket, exhaust doughnut, or some other type of exhaust leak.
The most common is the head gasket. BUTDepending on the engine there can be several other causes.
If you can find no outward leaks, and you are sure its not being blown back into the overflow reservoir by a bad radiator cap, the only other explanation would be a blown head gasket, but if that were the case you would see white smoke from your exhaust, and smell a sweet smell from your exhaust. check all hoses and other possible locations for leaks before exploring the head gasket, many people lose their coolant through bad radiator caps while they are driving and never realize until its too late, it will spill out the overflow on the road and virtually nothing while sitting still.
Intake manifold gasket