SL55/63/65/R230 AMG: IC pump replacement help
Thread Starter
Member
Joined: Aug 2009
Posts: 146
Likes: 1
From: Oakdale, CT
2003 SL55 AMG
IC pump replacement help
I just got done installing my Johnson CM30 to replace the ailing stock Bosche pump. After a reasonably long drive, I'm starting to think my new pump may not be working at all. How imperative is it that you bleed the system after replacing the pump? The Johnson pump doesn't have the third small nipple for what I'm assuming is a bleed/vent line like the stock pump does. Is this something I can do without? My next plan of attack is to use a multimeter to determine whether the pump is actually running or not. If anyone has any pointers on the subject, I'm all ears. Driving an "N/A" SL55 sucks.
Super Member
Joined: Nov 2001
Posts: 801
Likes: 2
From: South Florida
SL65
The CM30 didn't work well for my car either.
I went with the stock OEM updated pump from my dealer.
I know it works because I have the fastest stock SL55 on dragtimes.com.
Check you wiring and get a scanner to see your IAT's.
I went with the stock OEM updated pump from my dealer.
I know it works because I have the fastest stock SL55 on dragtimes.com.
Check you wiring and get a scanner to see your IAT's.
MBWorld Fanatic!
Joined: Feb 2009
Posts: 6,897
Likes: 85
From: Central WI (BFE)
SL55, ML500 & Acura TL
I just got done installing my Johnson CM30 to replace the ailing stock Bosche pump. After a reasonably long drive, I'm starting to think my new pump may not be working at all. How imperative is it that you bleed the system after replacing the pump? The Johnson pump doesn't have the third small nipple for what I'm assuming is a bleed/vent line like the stock pump does. Is this something I can do without? My next plan of attack is to use a multimeter to determine whether the pump is actually running or not. If anyone has any pointers on the subject, I'm all ears. Driving an "N/A" SL55 sucks.
An NA 55 kompressor is no fun at all.
Good Luck
