Question about 1999 Daewoo Leganza

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What happens if the timing belt brakes - 1999 Daewoo Leganza

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Most of the time this will cause bent valves, Replace the timing belt and what caused it to break? Do a compression test to find out how much dammage was done. a complete rebuild kit is available from ebay $350.00 But Valves And replacing them is extra around $200.00

Posted on Nov 14, 2009

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Because your Leganza has what is called an "interference" engine, should the timing belt break while the engine is running, it may very well seriously damage your engine.

Interference Engines… If your timing belt breaks, the engine will continue to turn, but the camshaft stops. If any of the valves are open, and your engine is an interference engine, the piston will slam into the open valve and cause some real expensive damage. Most modern engines are built with very close tolerances, and to squeeze every last bit of power into a small package, engine manufacturers sometimes create issues with clearances.

Because you are asking this question, I assume you may have had the belt break and you were wondering what's wrong...or, if you are thinking it may be time to replace it and was wondering if you could put it off until later... do it right away to avoid major expense.

Posted on Nov 14, 2009

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Timing belts do not have any inbuilt indicators as to how "worn" they are, nor do they have any "health" indications as to how likely they are to break.

Timing belts can last for well beyond their quoted service life, however they also fail with no warning whatsoever. When they fail, the valves in the engine stop moving almost imeadiately, but the pistons keep moving. At least one piston will hit at least one valve and will do a lot of damage. Puting this sort of damage right to an engine in a car this old could easily cost more than the car's worth !

If it's more than 5 years since the belt was replaced, or you dont know when it was last repalced, I'd do it now. A small independant garage should do it for about £150 to 200 all in - if that seems a lot, rebuilding your engine, or buying a reconditioned one, would be at least £750.

Posted on Nov 14, 2009

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Bent valves are a sign of a broken timing belt and when that happens on an interference engine it can stop very quickly. Overheating and smoking might mean the engine suffered seizure and when that happens the engine will stop even quicker so it could seem like the brakes came on.

Other than those possibilities there is nothing to connect the two events together other than pure coincidence.

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A timing belt usually makes a loud squealing noise (like a 'shriek/scream') when it is worn or slipping, not a grinding noise.

A quick check - before you start the car - is to pour some water onto the inside of the belt where it goes around the pulleys. If there's no noise at start up, you know it is the belt at fault (or the metal pulley/s are worn).

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If the noise happens before the car moves - it obviously can't be your brakes. When backing up the noise may appear louder simply because your head is turned ..

If the noise is actually coming from a wheel, it possibly could be the backing plate on the brakes - the thin disk behind the brake may be rubbing on the rotor.

However.. a grinding noise ... if it is coming from the front of the engine in the general area of the timing belt be very wary - if a bearing or the belt fails, your engine will be history.

Why not give a mobile mechanic a call? Those guys are usually quite good and a lot cheaper than a workshop

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Probably lost the timing belt, and the parking brake is just a coincidence to happen at the same time/

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What happens when the timing belt brakes


It bends valve and hurts pistons,ITs not a good thing when this happens,Is this what the shop told you? and I hope this helps you?

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My extended warranty only covers if i kept up with Maintenance


that is required if the belt breaks what happens usualy is the pistons will come up and hit your valvs ruening your heads and it wont be covered.

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Timing belt broke


I hate to be the barer of bad news, if your timing belt broke, you will probably need to replace the heads also. Not a small job. When a timing belt brakes the timing is out (of course) and when that happens the valves hit the piston and bend. So remove the water pump belt, a/c belt and the alt. belt. you will have to remove the harmonic balancer through the right wheel well. Before you remove this make sure number one piston is at the top of the cylinder. Then unbolt the black plastic timing belt cover, clean all the debris out. When this is done check the all the pulleys in there to see if they are nylon or metal, if they are nylon replace everything (nylon cracks over time from stress). Once that is done you will have to remove the heads to check for valve damage. If damaged you will have to get new or used heads or have yours rebuilt.

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