Are you saying that there was no pressure in the upper and lower radiator hose while the engine was hot???
Because that's physically impossible. If there's coolant in the system, and your engine is hot, there's definitely pressure in the hoses.
Now, while the engine's hot, feel the upper and lower radiator hose. If one is hot and the other is not, then your thermostat is stuck closed.
If the thermostat is good, then you'll have to check your water pump for flow.
With the engine cold, remove the radiator cap and start the engine. As soon as the thermostat opens, the fluid should start running out of the radiator. If it does, then your water pump is good. (Also check that the belts are tight)
Next, you'll have to pressure check the system. If the thermostat is good and you have proper flow, then you may have a blown head or intake gasket. This procedure is complicated and not necessary to explain unless everything else checks out first.
If not, write back and I'll help you from there.
Jan 22, 2010 at 3:42 PM
