Question about 2000 Daewoo Leganza

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Broken timing belt. Are valves bent? - 2000 Daewoo Leganza

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9 times out of 10, yes.

Posted on Oct 06, 2010

  • Thomas Campbell
    Thomas Campbell May 04, 2011

    Yes because this car is an interferrence motor which means if timing belt snaps that the piston heads will stop but will not stop the valves coming down when the car is in motion so bent valves so you can get a new head at a salvage yard and replace the top of head of motor so here is a web site for you to help you out. The timing belt for this car has to be changed every 60,000 miles or less so do not take the chances of running your car to the max of this 60,000 miles but also you can check out the timing belt by just taking off the two clips that is holding the camshaft plastic cover to see the top of it where the timing belt is at so if the belt is showing streach marks then replace it as soon as possible. Here is web site: http://en.wikipedia.org/wiki/Interferenc...

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Your engine is an interference fit so if the belt broken while it was running then you have bent valves.

Posted on Dec 23, 2010

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SOURCE: Replaced timing belt not running right

The Lanos engine are an interference engine. If you have bent valves, remove a plug wire one at a time and see if there is no change in the idle. My guess, one of them isn't going to change anything. That would be the cylinder that has the bent valves in. I had a Lanos in my shop with a broken timing belt and the head had several bent valves. I wouldn't be surprised at all if you also have bent valves.

Posted on Jan 29, 2009

csmock132
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SOURCE: broke timing belt and bent valves . i have

When you put on the head there are two oil pressure plugs under the cams with reverse torque heads. Did you put them in the new head?

Posted on Mar 14, 2009

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2 Answers

Does a broken timing belt automatically mean bent vales?


No you don't always bend valves typically with 4 or 6 cylinder engines are equiped with free floating engines that when the chains or belts break it allows the engine from creating greater damage to other parts of your engine

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Are you replacing a broken timing belt? Or are you replacing a belt because it's due by miles? If the belt is broken, i strongly suggest inspecting for bent valves. Daewoo is notorious for bending all valves and breaking valve guides in the cylinder head when the timing belt breaks. The broken belt is also common.

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There is a Technical Service Bulletin (TSB) that may apply to your situation. It is bulletin number IB00-S005.

This TSB addresses re=timing of the camshaft sub-gear in the event the timing belt was broken or the cams were rotated with the timing belt removed.

The only other thing I can suggest is to check for bent or broken valves. Popping back through the intake can only be caused by three things.
1. Camshaft timing incorrect
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Its got damage, bent valves. replace every thing on timing belt, tensioner, pulleys, water pump. The head needs to go to a machine shop and bent valves replaced.

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The Lanos engine are an interference engine. If you have bent valves, remove a plug wire one at a time and see if there is no change in the idle. My guess, one of them isn't going to change anything. That would be the cylinder that has the bent valves in. I had a Lanos in my shop with a broken timing belt and the head had several bent valves. I wouldn't be surprised at all if you also have bent valves.

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