Yes, if it's a 3 cylinder
sounds like timing belt has slipped so crank and rocker arm are out of sink(timing). get a book from auto parts store , will tell you how to check
Do you mean interference type or non-interference type? If this is what your asking, it is a non-interference type. this means that the timing belt can brake and no damage to the engine will accur. interference type means that if the belt brakes the pistons can hit the valves and bend and or brake stuff. don't worry about it on a geo metro I had two brake and it just stops running and replacing the timing belt takes 45 min to replace, it's easy. "BUGS"
YES
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...
yes, if it's a 3 cylinder Mr Geo Metro yes, if it's a 3 cylinder Mr Geo Metro
according to Gates.com the answer is no
When the timing belt breaks, the engine goes completely out of sync. The engine dies and cannot be restarted. It is my understanding that the 1993 Geo Metro 1.0 has a non-interference engine. What that means is that though the belt breaks, chances are the engine is not destroyed and replacing the timing belt will resolve the problem. In the case of an interference engine, unusually the engine pistons come in contact with the valves and causes severe engine damage. Regularly replacing the timing belt according to the manufactures recommendations, will keep the engine running smoothly for many years.
Interference engines are quite common in consumer automobiles, so even though the specific information is harder to find it is still most likely an interference engine.
VAlves are fine it will not bent valves
Oil check valves are designed to stop the drain-back of oil. A replacement valve costs between $25 and $30 depending on where you buy it.
zxcvbnm,
ACCORDING TO THE CHILTON MANUAL YES. EDIT: According to the manuals and parts description, they say these are interference engines. The SOHC versions are not interference while the rarer DOHC versions are interference engines. Since they are not aware of what engine you are working on, they would rather be safe and tell you it is an interference engine. I would have destroyed at least two of these engines if they were interference. I have changed timing belts and been off a few teeth at first.
No, 95 - 97 are self-adjusting, hydraulic lifters.