My 1989 Chevy van overheats and loses water but don’t see see water leak.? It happened when the smog tech I deled my van without turning the fan and then all the coolant spilled out. The engine still aims to be fine because I don’t see signs of water in the engine by checking the oil stick. I would appreciate any input.
crwdns2934109:0crwdne2934109:0
the leak may be a very small hole in a pipe, which spray the hot water on very hot metal body (like the engine) and the water evaporate, leave no trace.
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Hi @adis40481
With the vehicle safely parked i.e. transmission in park (AT) or Neutral (MT), handbrake applied and with a cold engine, remove the radiator cap and then start the engine.
After a short while, as the engine heats up you should see the coolant start to swirl in the neck of the radiator, indicating that the thermostat has opened and that the coolant is being pumped though the engine by the water pump.
Be ready to switch off the engine when it the coolant starts to flow because it expands as it heats up and will flow out of the neck of the radiator.
If the coolant doesn't flow at all and the engine heats up, turn the engine off before any damage occurs.
If it doesn't flow this could be due to a faulty thermostat, a faulty water pump or failing radiators hoses. Check the hoses by firmly squeezing both the upper and lower radiator and heater hoses. They should feel firm, stiff, and rigid. A hose that feels very hard or makes noises when squeezed is an indication of hardening or deterioration and may be failing internally affecting the flow of coolant.
Be safety aware when checking when the engine is running
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