Can i change piston rings on a 2.0 1g dsm motor from the oil pan as an entry point?

i poured trans fluid in the spark plug hole and let it sit. after replacing the plug drove it until the sticky ring straightened up. a day later i have low compression again in cylinder #2. can i pull the piston from below or will i need to take the cylinder head off?Can i change piston rings on a 2.0 1g dsm motor from the oil pan as an entry point?
It is absolutely impossible to remove the piston from the bottom. The cylinder block has ';webs'; that the manufacturers use to mount the crankshaft.





Speaking of crankshafts, how are you going to pull the piston down through that? How are you going to remove the crankshaft with the engine bolted to the transmission and a timing belt attached to the front?





The engine should come out and be rebuilt or replaced. The cylinders shouldbe bored and/or honed at a minimum.Can i change piston rings on a 2.0 1g dsm motor from the oil pan as an entry point?
You CAN pull it from below, but I don't advise it, your head side of the cylinder is beveled to aid in piston installation, your wear is also at the top of the cylinder, allowing the piston rings to ease into place. Remember, too that your clearances are much smaller at the skirt of the cylinder wall than at the head, this can cause you to cut your ring end gap too large just to fit them correctly.





If you drove the engine until the ring straightened up, are you sure the ring didn't twist and score the cylinder wall?
You're only going to replace the rings on one piston? Bit of a waste of time.





To do it properly, you should remove the motor and also replace big end and conrod bearings while the motor is out, and replace all the rings.





You MAY be able to get away with unbolting the engine mounts, removing the sump, jacking up the motor and removing the piston, however, its not the ideal way to do it. Im not familiar with the motor, but if it is a front wheel drive car, it will nearly be impossible.





Do things the proper way. Its far easier in the long run.
I agree with sfur74, you can't do it.