Corsa 2004 engine grabs

When it stays locked, take out the spark plugs and try to turn it a key, if it is locked, take out the distribution strap and turn the cam and the cgueñal independently, in the corsa this can be done because you can not catch valves and you will know if it is locked from the cam or crankshaft

Good miñoca, I would start by checking the distribution point (time strap) and then the oil pressure, the car may have a very bad maintenance and this will get the filter to catch. Change the oil and filter and put an SAE10W40 medium grade. You would have to verify that the tanes (bumps) are the ones that have to carry, that they slide gently and easily inside the accommodation. Keep in mind that the whole problem has been changing the taits. Greetings,