"Key won't enter ignition so unable to start the car."

"No"

"Car is stuck in On position on the ignition and the key is outside of the ignition, the key doesn’t go fully in, and I can’t turn either way to switch off the car or start it"

The user didn't provide a description

"Timing chain kit replacement"

"intermittent overheating"

"don't think so"

"Diagnostics doen by mechanic is that the head gasket is blow but they don thave the specilaised cambelt tooling to perfrom repair"

"The water boils in the coolant tank"

"Head gasket needs to be replaced."