hey, just wondering if anyone else has had the same problem ive had. ive had 3 2.8's and a 3.1 in my 88 z24. the first two 2.8's had 3or4 rods knocking at onece and the 3.1's oil pump went out and locked up the engine. my current motor, 2.8, is still running strong. anyone else have serious trouble like me?