bremereric
FMJ Body Moderator
Thanks mrold...answered my own again yesterday....old pictures tell the story...smaller opening on the left goes to the intake...larger on the right goes to the pump...Did a search, from what I can gather the small side (pass side) is the heater cores INlet, the larger one (drivers side) is the OUTlet side. Not knowing which is out on your engine I cant give that answer.
A copy and past from the info i got : {the heater core has different sized nipples and the engine should also. The smaller of the two is the inlet on the core or outlet on the engine so it would be on the outflow side of the cooling system. The larger of the two is the outlet on the core and goes to the inlet side of the pump. Just like a hydraulic system you want the larger hose to be the suction hose.}
also from a different poster....{The inlet to the heater core should be on the passenger side and be fed by the hot water coming from the intake. This is on a non-AC car.}
Hope its clear as mud for ya bremereric