Help on '89 626 LX

So I know this is the honda forum, but we're all smart over here so I figured I would get a responce. I'm working on a '89 Mazda 626 Lx right now. It has a squeaking/rumbling sound coming from the lower left engine area. goes away every once in awhile then comes back. car has 233,000 miles, but runs good so it would be nice to have this fixed. I'm hopeing its a cheep fix, if you have any ideas what it might be let me know.