It's official-- I HATE this M'F'n truck!!!!

[Russ]

The coolant filter should be run parallel to the heater hoses. The filter doesn't have enough flow to allow the coolant to run free though it. just T into the heater hose and run filter on a side line. It will still filter out the junk.

 

[defecater]

I understand what you are saying, but the instructions that came with it said to splice it straight into the line- either way, I need to know the direction of flow for the filter to work properly, ??no??

 

[typ4]

head to heater to water pump. Filter is to restricted to supply the heater.

 

[Agnem]

Like Russ said, the water is sourced at the head. The water pump is the return. Look here for how it should be done.