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What happens when a timing belt breaks - Blazer

When a timing belt breaks, the engine will stop (never happens unless its running). When you try to restart it:

  1. The engine will turnover with what will seem like extra energy (faster, easier than normal)
  2. The crankshaft and pistons continue as they always have
  3. The cam shaft no longer turns at all
  4. As a result, the valves no longer open and close. Instead they remain in the position dictated by where the camshaft came to rest.
  5. 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).
  6. Those with compression will not have a Fuel air mix as it cant get in through closed valves.
  7. There is the possibility with continued cranking that a piston can collide with an extended open valve causing further damage.
  8. Other symptoms include, gas smell, backfires through air intake and exhaust, the 'almost start', lots of battery power.

Best regards and good luck,

Mike

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2 Answers

while driving engine stopped and we cant get it restarted


Check the cam shaft is turning. ( broken timing belt) check that the engine has not over heated to the point of seizure.

Apr 16, 2014 | 2000 Hyundai Accent

1 Answer

runs eratic........won`t go .....engine makeing noise


Have you checked the timing belt yet ??
Depending on which engine you have, it may be an interference engine, which could damage the valves if the belt breaks while the engine is running or starting.

Apr 22, 2013 | 2003 Ford Focus

1 Answer

What happens if the timing belt breaks


The engine will stop running.
The 4 cyl turbo and 6 cyl engines are interference engines, which means the valves could be damaged if the cam stops and the pistons keep going.

Dec 12, 2012 | 2001 Volkswagen Passat

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what happens when timing belt breaks on a 1996 lexus es300


Hi Robert,

When a timing belt breaks, the engine will stop (never happens unless its running). When you try to restart it:
  1. The engine will turnover with what will seem like extra energy (faster, easier than normal)
  2. The crankshaft and pistons continue as they always have
  3. The cam shaft no longer turns at all
  4. As a result, the valves no longer open and close. Instead they remain in the position dictated by where the camshaft came to rest.
  5. 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).
  6. Those with compression will not have a Fuel air mix as it cant get in through closed valves.
  7. There is the possibility with continued cranking that a piston can collide with an extended open valve causing further damage.
  8. Other symptoms include, gas smell, backfires through air intake and exhaust, the 'almost start', lots of battery power.
I believe this answers your question.

Best regards and good luck,

Mike

Jul 17, 2010 | 1996 Lexus ES 300

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