Originally Posted by
splats
Depending what year the block & heads are, MAKE SURE THAT YOU HAVE THE OIL RESTRICTOR PLUG IN THE BLOCK (OR HEAD). It only took me 4 engine grenades before we found the problem. Its a $5.00 part that cost me thousands. Without it, it will pump all the oil to the head & starve the crank yet still have 50+ psi. If you use the factory head from THAT block, you should be ok. If not, check it. Apparently, this is unique to the 2.2/2.5 mopars. And for the rule nerds, its a factory installed plug that just pops into the oil passage TO the head. No rules creep or violation.