every radiator I put in ends up leaking
 

I have gotten 3 radiators in the last 4 months and noticed I'm starting to leak coolant again all the leaks are coming from the bottom of the rad in the aluminum..
there all AutoZone rads do you think its the rads that suck or is it something else going on ?

must be a bad batch ... you can get a Denso radiator from rock auto for about $60 or so.

Re: every radiator I put in ends up leaking
 

I bought the full aluminum radiator from ebay about 5 years ago, and solved radiator leak once and for all. The weak point on most radiators is the plastic areas. Just save yourself the trouble and get full aluminum.

I am not sure how yours is leaking though.