EURO KNG

Is it easy to change ? or should I have someone do it? also any suggestions where to buy it from thanks in advance.

D_Star

You would need to remove your bumper to change the intercooler pump.

1qikctr

It's easy, you should come to the mini meet held in millbrae. I can give you a quick VERBAL over view on how to changed out the IC pump.

EURO KNG

Hey 1qickctr , I really wanna go to the meet but I might have some family stuff to do on the 15th.If I can get out if it I will be there for sure.

60n5pt1

I've done this twice, first on a OEM Bosch and then a Ford Lightning 150.
I now have the CM30.
Never had to remove the bumper, obviously, the wheel has to come off first and the wheel well cover.
The actual remove and replace time only took me about 45 minutes which included removing the bracket and rewiring (splice) the leads with wire nuts.
If you're using the CM30, you can't use the original bracket (too big). I used the clamp that came with the CM30 but could only bolt one hole of the clamp. Make sure you tighten it enough (add a lockwasher). Worse case if the bolt loosens and falls off, the inlet/outlet plumbing would still keep the pump from going anywhere. Total time I'd say, is about 1 1/2 hours.
good luck!

pointman

Is a "coolant circulation pump" the same thing? *hides*

Gramma_Benz

See this thread:

https://mbworld.org/forums/c32-amg-c55-amg-w203/146457-1fastc32-s-cheep-intercooler-pump-replacement.html

EURO KNG

Just ordered the intercooler pump from code3 .

Fifth Ring

I used a Ford Lightning pump. The wiring needs to be spliced b/c Ford doesn't use the same plug as MB. There's a lot of little fussy work associated with the change, and you'll scrape a knuckle or two tightening belt clamps, but read the write ups here and take your time.

Buy some good stainless hose clamps. The factory crimp-on clamps cannot be re-used. (And getting them off was a b!tch.)

EURO KNG

Is it easy with the johnson pump from code 3 or the same ?

Gramma_Benz

Should be easier if not the same. I THINK the wiring harness with the CM30 is plug and play.

D_Star

I should have went with your route!

Gramma_Benz

Here's some specs for reference:

https://mbworld.org/forums/showpost.php?p=2386179&postcount=1

Well ive been looking over performance specs for the stock IC pump, the Johnson cm30 pump, and various other pumps on the market... I have done quite a few dedenbear pumps on cobras. The overall performance increase is unbelievable. it drastically lowers intake temps. I just need to figure out whether its worth it or not

Heres what ive come up with

:: Stock pump ::
Inlet: 20mm
Outlet: 20mm
Capacity: 14 lpm / 3.7 gpm
Current Draw: 2.1 amps

:: Johnson pump ::
Inlet: 20mm
Outlet: 20mm
Capacity: 22 lpm / 5.8 gpm
Current Draw: 2.2 amps

:: Dedenbear IC pump ::
Inlet: 3/4 npt
Outlet: 3/4 npt
Capacity: 56.8 lpm / 15gpm
Current Draw: 2.8 amps

Now considering that I am putting a larger heat exhanger on my car, i am afaid that the Stock/Johnson pumps just dont flow enough fluid to support the gallon's worth of increase in the cooling system. Although the dedenbear pump does cost about twice as much as a johnson, it flows about 3 times as much fluid.

SilverBulletAMG

According to results from C3P, the intercooler is the bottleneck so even with a bigger pump it won't matter past a certain point. They even eluded to the fact that too much flow could do damage to the system and cause it to run hotter as it gets backed up in the intercooler. I would think 15gpm is WAY overkill unless you went with a bigger, higher flowing IC.

Gramma_Benz

Actually, I should have also made reference to post #15 in this same thread by Vadim @ VRP:
Unfortunately the graph no longer links.

https://mbworld.org/forums/showthrea...79#post2386179

OverDrive

Since hes busy maybe you can give me a quick rundown\tip at the meet

60n5pt1

Code3 carries the same CM30 model. It only comes with two lead wires and a
c-clamp.

pointman

Help a brother out!

60n5pt1

:: Stock pump ::
Inlet: 20mm
Outlet: 20mm
Capacity: 14 lpm / 3.7 gpm
Current Draw: 2.1 amps

:: Johnson pump ::
Inlet: 20mm
Outlet: 20mm
Capacity: 22 lpm / 5.8 gpm
Current Draw: 2.2 amps

The strange thing is the CM30 is a much smaller unit than the stock pump but has more capacity and faster flow rate. You could not use the OEM bracket to hold down the CM30 pump because it has a smaller diameter.

Giorgiojustini

I tested my intercooler pump and found there is no power coming through the harness. Tested fuse #5 and it has power. Wire short? or is there a relay or other fuse to look at? When does the pump come on? Thanks.

320 dreamer

ressurection of an ancient thread! check the fuse in the trunk. i believe you have a 20 amp fuse there. pump comes on approx. 2000 rpm . stays on until engine shut off

Giorgiojustini

Thanks for your reply. I let the engine idle for about 10 minutes, put a 12V test light on the wire harness and tester did not light up. The 7.5 amp fuse in trunk did work. Im thinking a short in wire or is there a relay between fuse and pump that activates the circuit? Is this pump thermal activated?

mmisra

Hi, new on this - on that coolant pump,I hhave 2003 c32, replaced coolant pump for second time in May, but same thing has happened again. Is there a problem with relay or something- thats what MB are saying. How long should it take to fix this?? Thanks

60n5pt1

This is a do-it-yourself. Otherwise, pay thru the nose at the stealership. Roughly a 1 to 1.5 hour job.
Get the Johnson CM30.

I've never had a relay problem with the Intercooler Pump.

danish

Once again I have to change my IC-pump. This time the crappy Bosch lasted for almost a year... I decided to with the Johnson CM30 so I got one from the US. You can imagine my surprise when I saw that the pump is made in Sweden, where I live! Will install it in a few days, thanks Vomit for the help in the forum...