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If the timing chain in your 22 liter Chevy engine broke will the valves be damaged?

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Answered 2006-03-09 17:01:54

no the valvesn will not be damaged this is not a intefearance motor

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The 4.3 Chevy is a non-interference engine. This means the valves cannot hit the piston unless either the connecting rod or valve retainers break. This is highly unlikely if the chain is only broken due weakness or fatigue.


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As I understand it, a freewheeling engine, such as the 2.3 liter Ford is an overhead cam engine that will not crash the valves if the timing belt breaks. A 350 Chevy uses a timing chain since the cam is in the block. If the timing chain breaks on that, you're out of luck.


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Yes it is. Mine bent 6 valves. When the upper timing chain guide broke and chewed up the rest of the guides and gears. If the valves were bent than the engine is an INTERFERENCE ENGINE. A non interference engine has clearance between the valves and the cylinder head so if the timing belt lets go and the valves are in the intake or exhaust position they would clear the cylinder heads causing no damage to either. So the answer to your question is NO the engine is not an non interference engine


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Assuming you're talking about the TDC (dohc) motor. Unless you are Very familier with this engine I would'nt advise you to try setting it on your own. The 3.4L dohc or TDC engine requires very precise cam timming. There is only a .010 inch valve clearance between the valves and piston. In most cases, when the timing belt breaks on these engines the piston strikes the valves. These engines have sodium filled valves and are easily damaged. You should consider having a compression test done before even attempting to install a new timing belt. Which also should be installed by a qualified technition. The timing marks are "painted" on @ the factory and probably are no loner visible.


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If it is a gas engine it has a chain. If it is a diesel, it has a timing belt, and is an interference engine. The belt must be changed every 60,000 miles. It is highly unlikely that the chain will break without prior symptoms, alerting you to the fact that it is worn out. If it did happen to break, it will do no damage to the internal engine as this is not an interference engine. No, but you will be stranded. Chains last a very long time. If you are hearing chain noise or having trouble keeping the engine in time, the chain needs replacing.


It does not have a timing belt, That engine has a timing chain and gears and they normally last the life of the engine.


That requires an engine scanner to set the timing.


It requires an ENGINE SCANNER to set the ignition timing on that year of engine.


of course the valves get messed up in a timing belt failure. a simple way to fix it though would be to replace the timing belt and have one of your friends start the car. then proceed to try and keep the belt in place with your hand, in attempt to straighten the valves. This previous answer just shows the lack of knowledge allowed to answer questions on the internet. FYI, There are interference engines and clearance or non-interference engine. The former have longer valves that can hit the pistons when the timing belt or chain breaks or gets out of timing. In a Toyota, only the intake valves are usually damaged. In a BMW, the pistons are usually damaged requiring a near total engine rebuild. In clearance or non-interference engines, the valves are shorter and do not hit the pistons when the timing belt or chain breaks or gets out of time. In this case, the car stalls and needs to be towed to a mechanic for a new timing belt. As an unofficial rule of thumb, I look at the factory's recommended maintenance schedule. If it recommends changing the timing belt at 50 or 60,0000 miles, it is likely an interference engine. If the change interval is 100,000 miles or more, it is likely a clearance or non-interference engine. Also, if the timing belt is not well protected, like with a flimsy plastic cover, it is usually a non-interference/clearance engine. Timing chains can break or jump sprocket teeth and damage the timing chain cover. This can be due to a chain guide or tensioner failure. In an attempt to reduce vehicle weights or some such weak reason, many engines that had lifetime double link chains now have single link chains subject to failure. Yea, Toyota...


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