Another issue that plagues the 3.7 & 4.7 is carbon build up on the exhaust valves. Carbon builds up & hangs the valve open & spits the rocker. Pros & Cons of the 3.7 4.7.

Pros

Mopar engine, sort of.

Cons

Carbon build up on ex valve - spits rocker
Ex seats fall out - spits rocker
Lifter colapses/seizes - can break head, spits rocker
Sensitive to overheating - warps head

what ya gonna do?

Blown & Injected, need I say more? 71 Road Runner 04 Dodge Ram 2500 4x4 CTD