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#16
12-11-2012, 09:35 AM
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the water pump gives flow to the hot water in the engine into the top of the radiator, and the radiator removes heat from it, so the cooled water is following gravity through the radiator... 
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! 
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#17
12-11-2012, 09:52 AM
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#18
12-11-2012, 09:56 AM
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Top engine hose goes to top rad connection on my 1997 S320.
__________________
 Present 1987 300SDL 1991 300SL 1990 560SEL 2001 ML320 Past 1969 200D 1979-82 1983 300SD 1984-85 1972 250C 1982-02 1995 S350 2011 1997 S320 2012
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#19
12-11-2012, 11:06 AM
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gravity affects all, of course, and certainly there is some gravity fighting in there, but the cooling action of the radiator combined with the heating action of the motor will cause gravity to assist the flow by heating.
the pulling of the cooled water pushes the heated water into the top of the radiator. the pump gives it more speed and volume, but technically it's not fighting gravity, since gravity is pulling on the colder denser water and the hotter less dense water rises to the top.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#20
12-11-2012, 11:46 AM
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^^ Whats your take on the both ends on one tank radiator, in my old diesel VW, which had a huge 30 inches long radiator the water had to go from right to left then back from left to right. I remember that car having an 89C thermostat and a 450W electric radiator fan. It only kicked on at half speed once in a while. That radiator had enough area to cool the coolant without problems.
When I bought the car someone had rigged a one pipe per tank side to side radiator in it with a chintzy made in PRC cooling fan, and it was always being a PITA - once everything original was in place it worked good, and I didnt even have the ducts that guide air to the radiator.
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2012 BMW X5 (Beef + Granite suspension model) 1995 E300D - The original humming machine (consumed by Flood 2017) 2000 E320 - The evolution (consumed by flood 2017)
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#21
12-11-2012, 11:48 AM
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Who knew such a simple thing as a radiator can be so...... complicated.  I wonder what the "dual compartment" is for. Sorry... just had to throw that in there.
__________________
 85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project
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#22
12-11-2012, 11:56 AM
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! ! ____ -- <---- This divider makes the end tank two compartments - without it water will just fall to the exit and not go through the radiator ! !_____>
__________________
2012 BMW X5 (Beef + Granite suspension model) 1995 E300D - The original humming machine (consumed by Flood 2017) 2000 E320 - The evolution (consumed by flood 2017)
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#23
12-11-2012, 12:49 PM
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In effect... they just did that to facilitate hose routing to one side of the engine and not because of some secret cooling voodoo.
makes hose install easier I guess... for the M104 that is.
__________________
85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project
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#24
12-11-2012, 10:23 PM
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FWIW most (all?) watercooled VWs have the hot water go in the bottom of the radiator and the cooled water come back to the head from the top hose.
-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#25
12-12-2012, 11:39 AM
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Quote:
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#26
12-12-2012, 12:30 PM
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my diesel VW had it the regular way, cold in from below, hot out at top, the thermostat regulated it like the MB does, it lets cold coolant in.
__________________
2012 BMW X5 (Beef + Granite suspension model) 1995 E300D - The original humming machine (consumed by Flood 2017) 2000 E320 - The evolution (consumed by flood 2017)
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#27
12-12-2012, 02:09 PM
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Well I'll be... I had to double check and sure enough I was incorrect
  -J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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