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#1
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collant flow diagram for 85 300SD
Looking for a flow diagram, trying to understand how the collant should flow in and out of the heater core, through the 12V pump. lots of hoses in that small area.
Thanks to anyone who might shed some light on this for me. |
#2
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this help? simple design:
coolant comes out of the head into the monovalve then into heater core. monovalve is electrically controlled |
#3
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Quote:
that's not the diagram for an SD... and it pretty much ignores the monovalve. I'm thinking it's from a 240/euro book... looks like a manual valve in the diagram...
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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! |
#4
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Shadetree thanks for trying.
My moonflower has 4 ports, 3 are 5/8" and the 1 small 3/8" size Give or take one the metric thing. I just pulled the monoflow and aux water pump. Trying to understand the flow. Near as I can tell coolant is being pulled ( suction) down threw the MFV into the pump and discharged out to the engine compartment. But, why the two supply lines (larger ones next to each other) ? And what is the small one doing? Looks like it go's into a small block just below the windshield. What is that? |
#5
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I think there is a windshield defrost chamber built into the SD's monovalve circuit...
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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! |
#6
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The heater core is dual input, single discharge.
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#7
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Two supply lines and one discharge? Hmmmm this is interesting.
Anyone know if this is indeed the case? And why? My guess would be that it's an effort to not starve the AWP and keep it from cavitating ? One more question for all the mono flow experts, does all the coolant get pulled threw the small screen between the diaphragm and plunger stop? If so, this seems very restrictive. |
#8
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Quote:
Here is a picture; you can count for yourself: PeachParts FastLane Mercedes Parts Store It's a very common concept with heat exchangers; it's called "parallel flow." Quote:
No. |
#9
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Qwerty
Thanks for all the feedback, some how when I read your first response, I put a "I think" in front of it all. Sorry about that. I'll try and slow down when reading. so much to learn about these cars. |
#10
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sorry about that, i got that from the workshop CD for '85 SD. i guess that pic is wrong or is just very simplified
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#11
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Post #2 has the correct diagram.
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83 SD 84 CD |
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