coolant flow

[honourablepickle]

can some one tell me which of the two pipes to the heater matrix is flow and which is return please ?
car in bits again as massive heater upgrade in progress
ta

[GV]

Looking at the rear from the front of the car - the hose on the right is return. However, i don't think it matters as I've reconnected my hoses sending the coolant in the opposite direction as before with no sign of any trouble...it might even do it some good!!

[honourablepickle]

thanks for that gv - you're right it doesn't matter normally which way it flows through the matrix but as i'm fitting a booster pump to circulate the water through three different heater units i dont want it working against the engine pump
r

[adam quantrill]

The one that gets hot first - is the flow, the other - the return.

[honourablepickle]

pity i just ripped it all out without checking really adam

[GV]

I did that with my power steering hoses! I've put them back with new hoses on using the connectors as a guide as they are both at different angles...