Originally Posted by
donovan
The HPOP has been a problem, and so has the fitting that holds the oil line in place. It is not as common as the EGR Cooler. STC fitting how many times did ford revisit that one.
A LOT of HPOP's are replaced unnecessarily simply because of the STC fitting failure and incorrect diagnosis OR a tech too lazy to properly diagnosis the problem. I've never seen any discussion that the later HPOP's were a problem....more like virtually bulletproof.