Originally Posted by TOPFUELF250
Well, I finally installed my PMM coolant filter. Very easy install but one of the fittings wanted to keep leaking. I think I finally got it tight enough to stop it. We'll see. To all of you that installed the PMM filter, you might want to take a look at how close your heater hose is to the down pipe. I ended up cutting about 2" off of the heater hose just to move it away from the down pipe. I can imagine the heat coming off of that thing might take a toll on the heater hose. Just a heads up.
In regards to the downpipe, there are some variations in the hose and it may need to be trimmed. We recommend if you have the heater control valve to remove it from the vehicle completely and move the vacuum line to the closed nipple on the heater box. This really seems to be the easiest install on those trucks because the length of the heater valve crimps the hose up.
As far as threads go, put a generous amount of teflon tape on the threads, wrapped in the opposite direction as the threads. Doing it the same direction as the threads essentially unwraps it as you thread it in and will ALWAYS cause a leak.