Originally Posted by cortrim1
you can replace the rod bearings for about $30-50 but its hard to do with the motor in the car(not 100% sure it can be done with out removing the motor). A compression will tell if you have bad rings or a valve issue. A stethoscope could help you pin point the location of the noise.
1. not a good idea to do the bearings in the car(don't do it)
2. if the crank is mard at all it will need to be re-surfaced(or replaced)
3. buy a JDM motor and just swap then when you get a chance rebuild the motor that has the bearing problem. At that time you can set it up any way you want ie. turbo, high CR , or what ever.
Just my opinion, i have found it to be the easiest way for me. Lets hope it is just something simple and you have it fixed tonight.