Bad thermostat? Doesn't close enough to allow engine to warm up properly
it should start at cold
No, cold water is piped into the hot water tank and is heated by electricity or gas, it then flows out to the hot water taps.
the hot water valve shut off valve shuts off the hot water. The cold water valve shuts off the cold water. ;()
Cold Water is best. Cold water will solidify grease quicker and prevent it from sticking to the inside of the drain pipe causing stoppages.
Most definitely.
Not a good idea, you may and probably will crack and warp vital parts. Let it cool down on its own before even adding cold coolant into the system.
intake manifold gasket,head gasket,cracked head,cracked block. was it overheated? was cold water added to hot engine?
No. Hot or cold. This can be done by running the engine at the same time to ensure the fluid mixes. The danger would be introducing cold water into a hot engine which could crack the block.
Pouring cold water on a heated engine can cause thermal shock, which may lead to the engine block cracking or other components becoming damaged due to the sudden temperature change. It is important to allow the engine to cool down naturally before adding any water.
Have you checked your thermostat?
No. Let it cool down before you open the radiator cap and then put water in the radiator
Cold. If magnets get overheated, they can cease to work all-together.
pouring a bucket of ice-cold water on him/her always works
It is a physical change. The wax simply hardens in the cold water. You still have wax and you still have water; nothing new has been formed.
there can be several reasons, however it is usually due to overheating and/or sudden cooling --- such as overheating the engine and then pouring cold water into the radiator, etc. Occasionally, the engine manufacturer may have a flaw in the head casting or too thin metal, etc that will cause it to crack too.
If the engine is cold... it could mean that the radiator cap is too weak to hold and you need to get a new one. If the engine is HOT... it could mean that you have overheated it and you need to add water after the engine has cooled a bit, to prevent getting burned, be careful and use a towel to remove the cap to add coolant.