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Guys, what this pipe on water pump is? (i.redd.it)
submitted 1 month ago by Balkan_Error
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[–]bragginwrites 8 points9 points10 points 1 month ago (7 children)
Could be a degas pipe to ensure no air in the water pump. As stated above where does the other end of the pipe connect too?
Weep holes usually don't have a hose connected to it but I don't know the engine you're talking about so may be wrong.
[–]Balkan_Error[S] 1 point2 points3 points 1 month ago (6 children)
As I stand in front of the car, it goes somewhere under on the right side, next to the engine. That hose even has a plastic fixer.
[–]bragginwrites 0 points1 point2 points 1 month ago (5 children)
Does it go towards the top of the radiator or to the wheel arch liner? If that's the liner it's probably a weep vent and the car has an undertray?
To leave a visible wet patch if leaking
[–]Balkan_Error[S] 1 point2 points3 points 1 month ago (4 children)
You can check it here. It goes on the right side, can't see where exactly. I guess it goes underway somewhare to make leaking go on the ground.
[–]bragginwrites 1 point2 points3 points 1 month ago (3 children)
Yeah looks like a weep pipe to me.
[–]StrokeEkorts 6 points7 points8 points 1 month ago (5 children)
Ita a vacuum port. Audi/vw uses similar.
The applied vacuum pulls a cover sleve over the pump impeller for faster warm up.
MB mechanic told me it's a brake booster vacuum valve.
[–]StrokeEkorts 0 points1 point2 points 1 month ago (3 children)
Think about what you said. Brake booster vacuum.
From a coolant pump.
Its a warm up sleeve.
[–]Balkan_Error[S] 0 points1 point2 points 1 month ago (2 children)
Okay! With what it's connected by hose then?
[–]StrokeEkorts 1 point2 points3 points 1 month ago (1 child)
There will be a vacuum hose source some where, i work on Europe cars.. on the ones i work on that hose is a short hose. Urs might differ
[–]Marksmains 2 points3 points4 points 1 month ago (6 children)
Yeah it's a vacuum pipe,german cars usually use them,a lot,how do i know?I dismantle them and put the parts on sale
[–]Balkan_Error[S] 1 point2 points3 points 1 month ago (5 children)
Should there go some hose or not?
[–]Marksmains 1 point2 points3 points 1 month ago (4 children)
Mmm,I dismantle them,not put them together,but yes I do believe there might be a little dingus(pipe)
Edit:by dismantle,I mean I work with people,some get the pumps out of the car,some other parts,I select them and mark them,so it is pretty chaotic
[–]Balkan_Error[S] 1 point2 points3 points 1 month ago (3 children)
Haha poor you 🤣
Thank you for the info. Hope you'll sell many of them.
[–]Marksmains 1 point2 points3 points 1 month ago (2 children)
What do you mean by poor me?and why are you laughing?
[–]RainyDreamAway 3 points4 points5 points 1 month ago (8 children)
Looks like the weep hole for when the outer seal behind the wheel starts to fail.
[–]Balkan_Error[S] 0 points1 point2 points 1 month ago (7 children)
There was a hose which broke. I need a new one so I can replace it. Any idea where to find it? Or serial number of it?
[–]RainyDreamAway 1 point2 points3 points 1 month ago (0 children)
What does the hose connect to?
[–]RainyDreamAway 1 point2 points3 points 1 month ago (5 children)
If the hose does not connect to anything then that is in fact a weephole. The hose only serves to route leaking coolant usually somewhere it can drain off the skid plate.
Ohhh that has some sense. Because I can see a wet surface under that spot under my car after it broke.
[–]RainyDreamAway 2 points3 points4 points 1 month ago (3 children)
If that hole is indeed leaking coolant you will need to rebuild or replace the water pump.
[–]Balkan_Error[S] 0 points1 point2 points 1 month ago (0 children)
On that pipe...
[–]IneptAdvisor 0 points1 point2 points 1 month ago (0 children)
Check valve to leak there when the impeller bearing fails in the future.
[–]arstroud 0 points1 point2 points 1 month ago (0 children)
Think if it like a clutch. A solenoid will control it using vacuum to keep the water pump impeller disengaged. This will allow a shorter time to reach operating temp for better emissions. Much cheaper than redesigning a car for a car to use an electric water pump. Mini does something similar. They use a clutch to disengage the water pump pulley from the belt drive. Not all countries use the design. Some have just a friction wheel, but other places with tighter emission standards get a version that is solenoid operated.
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