? on bleeding the heat exchanger
08-31-2009, 12:58 PM
#1
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? on bleeding the heat exchanger
What's the best way to "activate" the heat exchanger pump (factory third generation Bosch ) to bleed out the air following a heat exchanger upgrade? I don't have a MB star or aftermarket equivalent, so I'm looking for other options here.
Can I just apply a 12V source (e.g., car battery) to the pump, or will that have too much amperage? If not an auto battery, what can be used as an alternative?
Also, I assume the engine does not need to be running for this process. Is that right?
Can I just apply a 12V source (e.g., car battery) to the pump, or will that have too much amperage? If not an auto battery, what can be used as an alternative?
Also, I assume the engine does not need to be running for this process. Is that right?
08-31-2009, 01:26 PM
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'06 E55, W204 C350, '04 Carrera C4S, '02 ML55 (Wife's)
Check the diy's... there's a couple of links... here's some;
https://mbworld.org/forums/w211-amg/...-pump-e55.html
https://mbworld.org/forums/c32-amg-c...ml#post2376178
https://mbworld.org/forums/w211-amg/...-pump-e55.html
https://mbworld.org/forums/c32-amg-c...ml#post2376178
08-31-2009, 02:37 PM
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08-31-2009, 03:27 PM
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you want to check this thread out..
its a bit newer and it has pictures too.
https://mbworld.org/forums/w211-amg/...-pump-e55.html
I also posted more details info on the process.
Basically, you can do it after your commute from work to home.
Pop the hood, remove the plug with a pair of pliers, place the small hose, routed to the reservoir,
turn on the engine let the bubbles disappear and turn off engine
remove hose and plug the IC line once more and close reservoir.
If the car is hot, the IC pump will come on. If the car is cold.. it will need to reach a certain temp before pump starts.
BTW: After installing a new IC pump a few weeks back, I have bled the system about 3 times.. and all 3 had air bubbles still showing up. Last night a had a few more, but much better than the first time.
-Joe
its a bit newer and it has pictures too.
https://mbworld.org/forums/w211-amg/...-pump-e55.html
I also posted more details info on the process.
Basically, you can do it after your commute from work to home.
Pop the hood, remove the plug with a pair of pliers, place the small hose, routed to the reservoir,
turn on the engine let the bubbles disappear and turn off engine
remove hose and plug the IC line once more and close reservoir.
If the car is hot, the IC pump will come on. If the car is cold.. it will need to reach a certain temp before pump starts.
BTW: After installing a new IC pump a few weeks back, I have bled the system about 3 times.. and all 3 had air bubbles still showing up. Last night a had a few more, but much better than the first time.
-Joe
09-01-2009, 09:28 AM
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My mercedes tech (who has been working at an independant shop since the 80's on only mercedes) said the same thing. Just change the pump out and no need to bleed w/a pump- just turn the heater on and leave the car in till no more bubbles. I questioned him 3 times and he confirmed it with another shop tech.
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09-03-2009, 12:50 PM
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good point.
I have done both way.. with and without clamping. You don't to clamp too hard, just enough to create preasure.
The clamping make pressure and the coolant flows quicker. I have done without clamping and I have obtained the same results. Just takes longer and there is a greater change you can spill coolant all over.
I know from experience.
I have done both way.. with and without clamping. You don't to clamp too hard, just enough to create preasure.
The clamping make pressure and the coolant flows quicker. I have done without clamping and I have obtained the same results. Just takes longer and there is a greater change you can spill coolant all over.
I know from experience.
