Its not Bosch but it might help.
Source: https://www.youtube.com/watch?v=wLIJ_9Ercms&list=PLHJZ2jPhTMKf0VC7-s1bSBLSXSLI3qMav
That is exactly what I needed to hear, I totally forgot about the t stat closing that off.#2 would depend on the thermostat position, closed it recirculating the coolant back to the pump, open or blocks the tube forcing most of the coolant to go towards the radiator.
Should be some flow, but I doubt as much if it was dumping into the low pressure side of the radiator
Normal #2 is part of the turbo coolant circuit.. which I can't remember which way it flows
I think it looks tighter in the pics the real life, they actually fit really nice. The strut bar still fits and clears well. So all this will still be under the stock hood.Yeah, i was just going to ask if you mocked it up with flipped manifolds. That is right tight.
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There is one guy that’s has on a truck. He is on this forum and has an old thread with pictures. I don’t think he is active anymore tho. I’d like for him to see this. Edit: he’s on diesel placeTwins in the valley? On a car? Dang man, thats just nuts. I cant say anyone's ever put them that way on a truck, even though there's more room to do it!
I know I'm late to answer here and Adam already did a good job of answering your question, but since I'm just now seeing it, I will go ahead and answer just for clarity. The port labeled #1 in your picture is like you said, always under pressure pushing coolant out. The port at #2 is always suction and is used as the suction side of the turbo cooling circuit (the thermostat housing you are holding appears to be from an LML, and it looks like the pipe plug next to port 1 is blocking what would be the feed for the turbo cooling circuit). Port 2 will have less suction when the thermostat is closed because the tube it is tied into is the bypass for the thermostat to recirculate coolant through the engine when the thermostats aren't allowing coolant flow past them to keep from dead heading the pump and preventing hot spots in the block and heads. Once the thermostats open, the bypass pipe is blocked at the top by the front thermostat allowing the water pump to have more of a pull on port 2.Ive been staring at coolant diagrams alot today. Someone please make this makes sense lol.
Regarding heater core coolant lines. My one hose goes into the lower rad hose so lets call that pump suction.
In the picture below: 1) is where a LB7 other heater core hose goes into, supposed to be "pressure coming from heads" cavity under thermostat, right? So that would reason that position 2 is also cavity under the thermostat, BUT position 2 is also pump suction. Is there enough of a pressure differential at position 2 that my heater core would function? This seems like it would work as much as it seems like it wont..... ive definetly been staring at diagrams to long
Oh, or would the bypass not really se any flow once the thermostat opens? but it has to because thats where the turbo coolant comes back, which also must mean it a "suction side" someone please confirm or deny or pour me a drink.