pmercury

iTrader: (2)

links updated 04.2020

sivikvtec

I’m in the process of building a bleed system and trying to understand the process.

Is this the correct sequence for starting with an empty intercooler circuit?

1) connect everything as shown in the first posts of this thread. Valve between the container with new fluid and intercooler fill hole is closed, preventing fluid from going into the intercooler circuit.

2) open valves at the intercoolers so the pump can suck air/fluid out of them

3) Turn on vacuum pump

4) Open valve from the fluid container, allowing fluid to flow into the intercooler circuit

Questions:

1) When do you open the valve to let fluid start flowing into the system? Do you wait until there is a certain pressure shown on the gage? What pressure?

2) Do you turn off the vacuum pump after opening the valve from the fluid container, or does the vacuum pump continue to run the whole time until the intercooler circuit is full?

Also, I’m trying something a little bit different and using this tank between the pump and intercoolers:

pmercury

iTrader: (2)

no


A)
turn on intercooler pump
open intercooler valve (first time both, once big air out on by one )
create vacuum to max
open fresh coolant tank that shoots in until vacuum pressure gone

use transparent hoses for intercooler outputs to check air live

close fresh input, build vacuum up again and restart the A cycle

it can take up to 25L / 6.6 Gallon to get all air out

sivikvtec

Thanks! Does the intercooler pump ever get turned off during the process? Or do you only shut it down after you are completely finished?

Swamp_Fox

Could we see a picture of your swirl pot set-up? Which swirl pot did you use?

pmercury

iTrader: (2)

I just leave it on but up to you

this is not about keeping it out, it's about removing air after opening the system or replacing hoses

the best thing to keep it out is the MB retrofit tank upgrade
never had air in again never

pmercury

iTrader: (2)

updated
added link to tank

2007 SL600

So... this tank catches any fluid that would otherwise be sucked into the vacuum pump?

Just still trying to wrap my head around this set up.

Thanks for your informative questions.

BenzNinja

iTrader: (4)

yes exactly

Vladds

This is a very important thread, subscribed.

NHSl550

I recently purchased the following parts:
Tank 2792000185
Metal hose 2790980891
Rubber hose 2790980283
Can any one update links to parts and pieces needed to build the bleeding tool?
Also, Will this pump work?

Swamp_Fox

I went to a hydraulic store with different fittings and valves assembled the center X section seen in the picture. You could use the picture to recreate something similar but I do not have any part numbers. The fittings on the intercooler (if my memory is correct) are low side AC quick connects and adaptor fittings go on the intercoolers.
Pmercury is the expert on this.

bicylindrico

Remove the fill cap, put a hose on the overflow nipple and fill the system to the top with coolant. place your hand over the fill opening, press open the schrader valve at one intercooler and blow into the hose you just placed on to the overflow nipple. Keep filling the neck as you continue to bleed the air out of each intercooler. This may take a dozen times going back and forth until you get a stream of coolant from each schrader valve. Leave the final fill level at just above the feed pipe that enters the main filler neck when cold.

Works every time and you don't need all the science kit stuff I see in all of your pictures.

krazykipa

Agree with the above. If you want a 99.5% effective bleed procedure without all the hassle, this is the way. Credit to this video: @ 28:00

Materials needed:
- Generic coolant bleed funnel
- 3/8” ID clear PVC tubing (around 5ft total)
- Schrader valve core removal tool
- Scan tool / DAS

1. Secure the funnel onto the low temp circuit fill cap.
2. Remove Schrader valve cores from both intercoolers.
3. Put about 2.5ft of PVC tubing onto each nipple, and place the ends into the funnel.
4. Fill funnel with about 300ml of coolant mix. (Assuming system is already full, not much is needed as it will recirculate)
5. Activate coolant pump.
6. Massage the hoses to force any larger bubbles along.
7. Let it run for about 5-10 minutes, until the flow is no longer aerated.
8. Stop the pump.
9. Disconnect the hoses and immediately install the valve cores. (The coolant in the funnel will prevent air from entering and instead force coolant out the nipples, use a few towels to avoid a mess)
10. Plug the funnel and remove it from the fill cap.
11. Enjoy your low intake air temps 😎

jfdturbo

Hey guys - I just did a coolant change in my intercooler circuit in the below video. I used a home-made bleeding system that worked pretty well. The process is not hard, but is a little time consuming to get all of the bubbles out. This is a 2012 S65 AMG. Hope this is helpful.
John

Hank Houston

Why are you guys making it so complicated? Why not just use a coolant vacuum filler to suck out all the air and then use the vacuum to fill the system? You could get one of these on Amazon for $30-$40 and you won't have to worry about which nipple to suck on

Vacuum coolant filler. super simple to use and they are cheap to buy

2007 SL600

Thanks for the post...just what I was needing.

Hank Houston

I'm not understanding why they're making it so complicated. Like do you really need to mess with the Schrader valves? I'm gonna buy one of these vacuum coolant refill kits and try to bleed mine this week. I'll let you know how it goes