How would i know if a head gasket is cracked or leaking if i dont see the water.for a 2000 cadillac deville

water pumps do not boil but engine coolant systems do from lack of water . Water pumps leak and get bad bearings but the heat comes from blocked radiators-blown head gaskets--cracked heads --fans not working and the vibration is from pistons and rings trying to bind up in the cylinders from over heat situation

Vehicle has a hair line crack in head gasket. It will not register on compression test replace gaskets and have heads checked vehicle problem should be repaired

Unfortunately, with all you have done, it appears you may have a blown head gasket or cracked head if you cannot locate any other place that the water is leaking from. First of all I would check the car for leaks after you have been driving it and turned it off. The pressure builds up in the system right after the car is turned off and you may see leaks then that you never see. If you still dont see where the water is leaking from by doing this, then pull the oil dipstick up out of the tube and check your oil. If there is a white milky substance on the oil then there is water getting into you oil which indicates a bad head gasket or cracked head. If you still dont find water in your oil by doing that then your water/coolant is probably escaping through your exhaust by water vapor. Check your exhaust while the car is running (after it has warmed up) and see if there is any water vapor coming out. Put your hand in front of the exhaust and you should feel the moistness if there is water vapor, but you should see it as well. If so, again, it is a head gasket or a cracked head. Make sure you look for all leaks in hoses, etc, (including inside passenger floorboard from heater core leaking) before you totally conclude that this is the head gasket or a cracked head. If you cannot locate any other source for the leaks then the only thing left is the head gasket or head.

Check this porcedure for 2000 Cadillac Deville 4.6L SFI DOHC 8cyl...

These engines are know for leaking head gaskets. A good quick test for this is fill the coolant tank to the top with the cap off. Start the engine. If the the coolant blows out of the tank, you have a head gasket leak.

well I'd say that coolant is definitely leaking into the combustion chamber, albeit at a slow rate (for now). It could be anything from a blown head gasket to a cracked block or head. I'd get it to a shop as soon as possible and not drive it any more than need be until that point.

this problem is a leaking cylinder gasket(s)

do me a favor and pull the sparkplugs out get a compression gadge and do compression tests on all the cylinders they should be within ten psi of each other if not yes you have either a cracked head or a blown head gasket

Head gasket. There is antifreeze seeping into the cyllinder when it's not running. When you start it, it won't fire properly until that water is blown out the exhaust. Once it's gone, in a few seconds, just like you describe, it'll run fine. The antifreeze is then being blown out the exhaust. Re - white smoke.

2 Inspect Belt Incorrectly routed, adjusted, tensioned, missing, or worn water pump belt(s). 3 Inspect Oil Pan Gasket - Performance Ruptured, cracked or leaking radiator hose. 4 Inspect Radiator Cap Worn or damaged radiator cap 5 Inspect Thermostat Thermostat stuck closed 6 Inspect Fan Blade Broken, missing, or defective fan blade(s). 8 Inspect Water Pump Damaged, worn or leaking water pump. 9 Inspect Intake Manifold Plenum - Perform Leaking water pump gasket. 10 Inspect Cooling Fan Control Faulty cooling fan control or circuit. 11 Inspect Cooling Fan Switch - Radiator Faulty radiator cooling fan switch or circuit. 12 Inspect Engine Temperature Sensor Faulty engine temperature sensor or circuit. 13 Inspect Temperature Switch Damaged or faulty temperature switch or temperature switch circuit. 14 Inspect Fan Clutch Worn, loose or faulty fan clutch. 15 Inspect Ported Vacuum Switch Damaged, leaking, or faulty ported vacuum switch. 16 Inspect Radiator Obstructed radiator core or radiator cooling fins. 17 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders here is a list of things to check Shaun