What direction the water circulates in small block chevy? [Archive] - El Camino Central Forum : Chevrolet El Camino Forums

: What direction the water circulates in small block chevy?


Vetterss
02-25-2011, 08:27 PM
Dumb question and I haven't had time to check into all the books. What direction or flow pattern does the water follow in a 350 small block Chevy? I have to put a valve in one of the hoses for my new after market air conditioning and need to know the flow pattern of the water. I specifically need to know which hose the water will flow from to enter the heater core. Is it the one connected to the manifold or the one on the water pump itself? Any help would be great!!

Sharp71
02-25-2011, 08:34 PM
From the pump to the heater core.

Mike P
02-26-2011, 03:48 AM
Actually the flow (pressure side) will be the hose fitting on the intake. The fitting on the water pump is the suction side and feeds back into the waterpump impeller in the same area as the bypass water.

kloudryder50
02-26-2011, 07:13 AM
thats right, you have to heat the water in the block first then pump it to the heater!!:poke:

JJLT1
02-26-2011, 07:47 AM
x2 mike,,thats what i allways thought..
and the "in" on the heater core is the bottom,,"out" is on top..:texas:

Sharp71
02-26-2011, 08:04 AM
my bad. what was I thinking!:dontknow:
That's what I get for posting on a Friday evening! :beer:

Marv D
02-26-2011, 11:31 AM
Pretty clever with the small block,, water goes from the bottom up, oil goes from the top down. go figure

theelcaminofactory
02-26-2011, 01:20 PM
Is this the case with all smallblock Chevys? (trick question) What's reverse direction as opposed to reverse flow?

steelybill
02-26-2011, 03:41 PM
I believe the smaller (5/8") hose is the pressure/inlet side on the heater core. Of course I could be wrong, I was once back in 1947.

texasjim
02-26-2011, 07:21 PM
I believe the smaller (5/8") hose is the pressure/inlet side on the heater core. Of course I could be wrong, I was once back in 1947.
Bill you must be like me I too was wrong back in the 50's turns ouy my mistake was thinking I was wrong when I really wasn't Jim:texas:

rangomr
02-26-2011, 07:29 PM
Bill you must be like me I too was wrong back in the 50's turns ouy my mistake was thinking I was wrong when I really wasn't Jim:texas:
:weird::nothingtoadd:

steelybill
02-26-2011, 11:20 PM
:smileyb::smileyb:

Vetterss
02-28-2011, 01:40 PM
Thanks everyone! Started off confusing but it all came together at the end.

ALAsh
02-28-2011, 01:50 PM
So does all of this still hold true if you are running a serpentine system which requires a reverse direction water pump....I wasn't clear on that...

Hope I'm not hijacking the thread but I think he did get the answer he needed.

1BadElky
02-28-2011, 05:59 PM
So does all of this still hold true if you are running a serpentine system which requires a reverse direction water pump....I wasn't clear on that...

Hope I'm not hijacking the thread but I think he did get the answer he needed.

a REVERSE ROTATION pump in a serpentine setup still pumps water in the same diection. the serpentine pump is just designed to do so by spinning the opposite direction of the V-belt pumps.


the Gen II LT1/LT4 are the only small blocks that use a REVERSE FLOW pump, which cools the heads first, rather than the block.

zach01s
03-01-2011, 01:10 AM
a REVERSE ROTATION pump in a serpentine setup still pumps water in the same diection. the serpentine pump is just designed to do so by spinning the opposite direction of the V-belt pumps.


the Gen II LT1/LT4 are the only small blocks that use a REVERSE FLOW pump, which cools the heads first, rather than the block.

I didnt know that. learn something new everyday lol