kk100

Hello all

I am getting the intercooler pump replaced in my W215 CL. I got the updated pump 0 392 022010 and the guy fitting it said that on the pump he is taking out there is a small outlet connecting to a pipe - and on the new one there is a nipple to connect the small pipe but the nipple portion is solid i.e. no small opening like the original one. I will upload a photo shortly. So my question has anyone experienced this before and will this create any issues, quick responces would be appreciated as he was planning on doing it in the morning if the pump is correct. Thanks

kk100

kk100

biker349

you had better research this and definitely don't take my word for it, but i believe i read somewhere that you need to open up the nipple, but check and make sure before you try this.

kk100

Thanks. I have done a bit more research and spoke to people who have fitted the new pump. Apparently it is just the new design of the pump and the nipple was left to connect the small pipe to prevent it from flapping about in the engine

principledchiro

The nipple is to be filed down to expose the orifice that self purges the pump. The hose attaches to it comes from the coolant recovery container.

kk100

Thanks for the reply.

What does the nipple do in terms of how the pump works - is it just like an overflow if there is too much pressure in the pump and returns it to the recovery container?

I just want to be certain before I do this so are you 100% sure that this what needs to be done i.e. file the nipple down to oppose the orifice?

Isn't it strange that MB sell a part that requires a solid element to be filed down in order for an opening to be created - I wonder why they didn't just create it with the opening in it in the first place.

Thanks

principledchiro

The nipple when not grounded down approx. 1/4 inch serves no purpose except for the E55 Kompressor, which didn't use it due to not having self air purging intercooler. The E55, CL55, S55, and CL65 use the same Bosche 10 I/C pump. The larger cars (not E55) use the nipple as a means to self purge air from the intercooler circuit (not sure about the CL65?). The nipple is grounded down to expose the orifice, then the small diameter rubber hose from the coolant overflow container is connected to the nipple. Check the coolant overflow container for a small diameter hose coming off it in addition to the larger diameter hose. If there, it goes to the nipple on the pump. Hope this helps. I have an 06 CL55 AMG (mods except 82 mm throttle body, approx. 610 chp).

biker349

thank you immensely. i thought i read that the nipple had to be ground down. i appreciate the explanation.

kk100

Brilliant, thanks for this - I had searched everywhere and could not find out anything.

biker349

does the cl600 need the nipple filed down? didn't see it on the list. is it only the supercharged models that have the tube, or do the turbo models have them as well?