[johnjzjz]

if you have damaged the cam bearing you have a problem - IF the bearing is driven out front to rear and will fall into the oil pan - i have never changed one with the motor in the car BUT if you could remove the front one pulling it forward NEVER tryed it that way you could just install the one - the cheap tool wont help you its just a lip sleeve that bangs the old one out - the HIGH dollar tool given to some one that does not know how to use it - well lets just say no one will rent that one anyway and it also does not remove the bearing in reverse like you need -

having said all of that i do believe it can be done its easier to install the new one than take the old one out - die grinder is out too much sand every place - maybe a small 3 finger puller on a slide hammer could be rigged interesting ideas about doing this but if your a novice - take the motor out its cheaper in the end -- jz