The engine timing is off. If timing chain slips will it damage anything else. i,e valves, bearings, ect,.

The 2004 Chevrolet Optra features an attractive 2.0L Dtech 16-valve engine. In an intervention engine, valves and pistons share the same space in the combustion chamber, and if the timing belt (or timing chain) breaks or slips, valves and pistons are at risk of blowing, which can severe engine damage so it is important to adhere to the recommended timing belt replacement intervals to prevent such issues.

Yes a broken chain could sound like and cause a 'no start' condition.

Unfortunately I believe this is what's called an 'interference' engine. In other words, if the chain slips or breaks it COULD cause the tops of the pistons to come into contact with the valves. Bending the valves and possibly causing piston or cylinder head damage.

Also if I'm not mistaken the water pump is also run off of the same chain. So IF you find the chain broke or slipped it may or may not have caused serious damage to other engine components. The water pump isn't a big deal but the valves, pistons, or cylinder head could add up real quick expense wise.

Being attempted starting has already occurred (which is understandable as that's the first reaction when a vehicle stalls) any damage that may have happened is already done. Now it's a matter of diagnosing to see how bad it is.

When attempting to start the engine it will turn over with a rather non-rhythmic sound if the chain broke or jumped time.

Sorry for the 'gloom and doom'. Simply trying to give a straightforward answer.

IF the belt slipped or broke there may be damage. to check for valve damage remove valve tappet cover and check valve clearance ,if the clearance is excessive there is damage . bent valves and damaged pistons .

P0017 Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B)

Symptoms of a P0017 will or may include: Malfunction Indicator Lamp (MIL) illumination The engine may run but with reduced performance The engine may crank but not start The engine may exhibit a rattle near the harmonic balancer indicating the tone ring is damaged The engine may start and run, but poorly Causes Causes may include: Timing chain stretched, or timing belt skipped a tooth due to wear Misalignment of timing belt/chain Tone ring on crankshaft slipped/broken Tone ring on camshaft slipped/broken Bad crank sensor Bad cam sensor Damaged wiring to crank/cam sensor Timing belt/chain tensioner damaged An improperly torqued crankshaft balancer A mis-built or mis-timed engine A loose or missing crankshaft balancer bolt The CMP actuator solenoid stuck open The CMP actuator stuck in a position other than 0 degrees

P0300 Random/Multiple Cylinder Misfire Detected

Symptoms may include: the engine may be harder to start the engine may stumble / stumble, and/or hesitate other symptoms may also be present Causes A code P0300 may mean that one or more of the following has happened: Faulty spark plugs or wires Faulty coil (pack) Faulty oxygen sensor(s) Faulty fuel injector(s) Burned exhaust valve Faulty catalytic converter(s) Stuck/blocked EGR valve / passages Faulty camshaft position sensor Defective computer

I think you had better have a local shop inspect this for a failed engine connecting rod.

Sounds like it could either be a spun out main bearing or camshaft bearing or it could be knocking from low octane gas, depending on how loud it is. A main bearing or camshaft bearing that is spun will make an unmistakably loud cyclic noise. While, the low octane gas will cause a softer random rapid knocking sound that sounds like a babbling brook. Check for codes in the engine that might explain why there is an octane related knock, like a knock sensor not working or something like that. Good luck on finding a solution to your knocking problem.

The best way i know is to ake off the rocker box set it to tdc then brake the chane in half atatch the new one to yhe old and hand turn the engine with a ratchet ect the turn will feed the chain around bottom cog inside the engine keep turning untill the new chain has come through all the way disconect the old chain and join the two new ends together job done just make sure the timing marks on the head and at tdc if it slips you will have to fet itvrevtimed again hope this makes sende ivan

Check the vehicle manual for recommended mileage for replacing the timing chain.Locate the timing chain,you will need to replace it if the automatic chain adjuster "also known as the tensioner " is damage or worn.Drain the cooling system and disengage the negative battery cable.Undo the spark plug wires and set the No.1 piston at Top Dead Center ( TDC ) of the compression stroke. Disconnect the engine undercover,vacuum and fuel hoses,harness and connectors,drive belts, power steering reservoir,alternator and bracelet,upper radiator hose and,air doct,front exhaust tube,intake manifold collector supports,collector and exhaust manifold and distributor.Prop up the oil can and take out the front engine mounting,the valve cover and camshaft sprockets,cam bearing caps and camshafts,cylinder head bolts, cam sprocket cover,upper chain tensioner,chain guide and the chain,idler sprocket bolt,cylinder head,intake manifold and cylinder head gasket and the steel oil pan. Place a steel cutter between the steel and aluminum oil pans.Slip the cutter around the the edge of the oil pan and disengage the steel oil pan,baffle plate,oil strainer and front tube. Secure the vehicle on jack stands and place a seal cutter between the oil pan and the cylinder block,slip the cutter around the edge of the oil pan.

you should be ok.. i have never seen valve damage on one of these engines after belt breaking..just retime everything and install a new belt..make sure you check water pump and tensioner bearing for looseness/wear