When a timing belt breaks, the engine will stop (never happens unless its running). When you try to restart it:
- The engine will turnover with what will seem like extra energy (faster, easier than normal)
- The crankshaft and pistons continue as they always have
- The cam shaft no longer turns at all
- As a result, the valves no longer open and close. Instead they remain in the position dictated by where the camshaft came to rest.
- As a result, there will be no compression in 75% of your cylinders (without compression, the engine cranks faster when you try to start it, no resistance).
- Those with compression will not have a Fuel air mix as it cant get in through closed valves.
- There is the possibility with continued cranking that a piston can collide with an extended open valve causing further damage.
- Other symptoms include, gas smell, backfires through air intake and exhaust, the 'almost start', lots of battery power.
Best regards and good luck,