Coolant Flow direction
04-08-2016, 08:54 AM
#11
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Join Date: 09-07-2008
Location: Mebane, NC
Posts: 1,016
Sorry FG didn't intend to give you a headache, it's good to excersise you brain some times. 
I've been looking at the parts and based on that observation I believe that flow does go from the T-Stat housing to the center of the of the wp. That would make the t-stat a backwards operating t-stat since the feed line to the t-stat housing comes from the lower-cold section of the radiator.
The T-stat housing itself has two connections that go to the heater core, one from the hot side, the other toe cooler side. Also, there is a small orifice that connects to two sides of the t-stat that I believe is air bleed orifice.
The t-stat cover/housing also has another port on it, that port with a hose, is connected to one side of the oil cooler. The other side of the cooler is connected to a tee in the radiator lower cold side hose.
Most all centrifugal pumps have the inlet in the center and the outlet is tangential from the diameter of the impeller. Our WP is in essence a centrifugal pump.
To be sure I'm going to connect a drill motor up the shaft of the water pump put it into a bucket of water and see which way the water flies... At that point it will be easy to work backwards.
Now my head hurts.
Dan, hows your project going?
Will be on our way to Oklahoma city on Monday to put this project to bed. Come back and may have to go to Orlando, universal, then out to Vegas to the MGM grand and then Orlando again. Isn't life on the road fun and glamorous... get to go to all these fun places to work our @$$ off.
I've been looking at the parts and based on that observation I believe that flow does go from the T-Stat housing to the center of the of the wp. That would make the t-stat a backwards operating t-stat since the feed line to the t-stat housing comes from the lower-cold section of the radiator.
The T-stat housing itself has two connections that go to the heater core, one from the hot side, the other toe cooler side. Also, there is a small orifice that connects to two sides of the t-stat that I believe is air bleed orifice.
The t-stat cover/housing also has another port on it, that port with a hose, is connected to one side of the oil cooler. The other side of the cooler is connected to a tee in the radiator lower cold side hose.
Most all centrifugal pumps have the inlet in the center and the outlet is tangential from the diameter of the impeller. Our WP is in essence a centrifugal pump.
To be sure I'm going to connect a drill motor up the shaft of the water pump put it into a bucket of water and see which way the water flies... At that point it will be easy to work backwards.
Now my head hurts.
Dan, hows your project going?
Will be on our way to Oklahoma city on Monday to put this project to bed. Come back and may have to go to Orlando, universal, then out to Vegas to the MGM grand and then Orlando again. Isn't life on the road fun and glamorous... get to go to all these fun places to work our @$$ off.
04-08-2016, 08:59 AM
#12
Technical Moderator
Join Date: 01-23-2009
Location: Fredericksburg, Virginia
Posts: 24,686
Good question Don.
But, is the water pump in fact a centrifical pump with straight vanes which slings fluid out ?
Or is it a simple pump with curved vanes that draws fluid in and pumps it back through the center shaft piping ?
Now I've got a headache. Trying to recall all that info I learned before retiring. 30 years of Apparatus Operator, Pump Operations and other classes.
You guys are making me crazy.
But, is the water pump in fact a centrifical pump with straight vanes which slings fluid out ?
Or is it a simple pump with curved vanes that draws fluid in and pumps it back through the center shaft piping ?
Now I've got a headache. Trying to recall all that info I learned before retiring. 30 years of Apparatus Operator, Pump Operations and other classes.You guys are making me crazy.
04-08-2016, 09:09 AM
#13
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Join Date: 01-23-2009
Location: Fredericksburg, Virginia
Posts: 24,686
Mine don't have any bleed orifice, maybe a SS thing. The heater operates in a bypass mode at all times. The housing attaches to ports in the cylinder head. In modern engines the T-stats job is to keep the coolant HOT, not cool, so yes, from the bottom makes sense.
04-08-2016, 02:57 PM
#16
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Join Date: 01-23-2009
Location: Fredericksburg, Virginia
Posts: 24,686
That's what I thought, but doesn't Drloch have an SS w/oil cooler?
He is talking about something else.
I think we may be using the wrong terminology re the pump. Is it a volute, not an impeller?
OOH, headache time. Sorry!
He is talking about something else.
I think we may be using the wrong terminology re the pump. Is it a volute, not an impeller?
OOH, headache time. Sorry!
04-09-2016, 07:47 AM
#19
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Thread Starter
Join Date: 09-07-2008
Location: Mebane, NC
Posts: 1,016
donbrew yes I have an SS and the engine I'm working with is an SS 2.0 turbo.
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