I have been told that I need to rebuild my low end its wicked bad knock and i dont want to let it go to far. I want to know what is needed i guess... its either that or put a GSR into it but not sure if it will bolt in. rather rebuild it instead...
the motor is a b20a5

 

no a gsr will not go into a 3g prelude. the only motor swap currently possible without all custom parts is an h22.

first thing you'll need to do if you decide to rebuild is verify the condition of the crank and rods and bearing seats in the block. if all of those are good, you can usually get away with just replacing the bearings and any gaskets/seals you can get to. a lot of times you can even do it without pulling the motor. sometimes you can even do it without pulling the head if the rings are still in good shape; just by dropping the pan and girdle and replacing strictly the bearings

 

^^^ What this guy stated.

Pull the crank, take it to the machine shop for inspection. Do what they recommend (if it's a respectable machine shop - one with a familiarity with Honda/Acura/Toyota/Nissan doesn't hurt either).

Replace all bearings, although, you could probably get away with just rod bearings since mains typically don't go bad too often. But it's a good idea to refresh everything. If you reuse any main bearings, be sure to keep them in the exact positions.

If the engine's leakdown is great, you can avoid replacing the piston rings as well. But if the engine has some mileage and wear, you'd probably want to replace them as well.

 

now can i do it in two stages first do the rods and bearing then do the pistons and rings or does it all have to be done at the same time.. casue its my only car and i need to get to and from work and school. but even though both are bseries it wont work. not even with diffrent mounts? and i have read on here that the power to weight is completely off on the h22 in 3rd gen is that tru or myth?

 

If this is your only car and youre still in school, and since it sounds like youre relatively unexperienced, I wouldnt undertake this project until I could afford to have some down time.

 

You should do it at the same time. Rods and pistons have to go in together; there is no way around that. But you can do the piston rings, and leave it sit in order to do the bearings later. But what would be the point in that? Do it all at once so you don't lose track of anything.

Not sure what you're trying to say regarding the H22 and the B20 in the Prelude. The H22 makes a lot more power, so it will change the power to weight considerably. But I don't see that being bad. Perhaps you mean weight distribution???

 

that is what i ment by the weight with the distribution. the reason i asked about the pistions and rings is because its not smokeing... so right now im working on a budget so you all know how that is.. and i have a few friends that are in honda tech program and there job is honda so i have the resources to get it done i just wnat to know my options first.. a motor swap is my last option if i need to do it then it needs to bedone. but im a very hands on person and i accel fast.. and when i want it dont i get **** donw if that means working on the car for 15hours stright then ill do it.