Radiator question
 

How do you tell how many "passes" a radiator has?
I hear people say they have four pass radiators with a level of smugness rarely attained by man.

i feel like an idiot for asking this. It seems like it shoud be so obvious.

Thanks,

Whomp!

So, ...

No Replies.

was it really that stupid of a question?

You ought to be able to tell, simply by observing very closely, your rad.

Got a pic?

Crap ... I don't have anyplace to host a pic.

more 'passes' = greater head loss
their "smugness" = foolishness

the number of passes refers to reversing direction

Well, being a bear of very little brain, all it took was a minute or two to figure out my heater core is a 4 pass. I think I may have too much heater core for my pump, but we'll find out.
I'm waiting on some 1/2" hose barbs from McMaster, then its time to put the whole thing together.

Hello!
I sent Your question to Hard Ware Labs and got this answer from someone called Willie:

The terminology was derived from the number of turns the coolant would make
inside the radiator.

A single pass rad would simply have two single-cavity top and bottom tanks.
While two pass radiators would have a single cavity bottom tank with a 2
cavity or dual upper tank (more reliable than single tank dual cavity)
configuration.

Hope it helps You.
regards
Mikael S.