dan1495

I have read so much about IC pumps failing through the years that I have been waiting for it to happen to my '03 25,000 miles SL55, and maybe it has.

After a 5 mile trip down the freeway in 30 degree weather I tried to (very) quickly accelerate from around 50 MPH. It felt like the car died, which it did not, and I coasted to a stoplight. When leaving the light it felt like the car was in some sort of "limp home" mode. I shut the car down, waited about 5 minutes, re-started the car and everything was back to normal.

Does this sound like an IC pump beginning to fail or something else?

Thanks.

320 dreamer

yep. common ocurance

Chris-W

Without a doubt it was your IC pump. If you had carried on driving it it would have cooled down and come back on line.

IngenereAMG

It sounds like the IC pump.

FLSL55

Get the OEM one. The CM30 others use IMHO is not as good as the current MB one.

They have worked out all the kinks over the years on the OEM one. I think it's on it's 6th version.

JackStraw

I thought IC pump issues typically presented themselves when the outside temperature is high. The OP said the temperature was 30 (Fahrenheit, I assume). Anyone care to enlighten me?

sound 8

I think he meant 30 degrees Celsius , about 86 degrees. WARM.

Sunir

Can you elaborate on how you justify this? I am curious to learn more as almost everyone says the CM30 is a better pump than factory, especially when you add some mods like TB, Pulley and tune etc...? Isn't this true of am I missing something? I had my IC pump replaced in Feb '09 but was thinking of switching to CM30 when adding a few mods...

anyone have any insight on CM30 vs. factory unit (relatively recent)?

320 dreamer

outside temps only play a small part. if the pump doesnt circulate the fluid it heats up rapidly and the iat's raise to a point the ecu shuts down the s/c to protect it. run your car in cold weather and grap the s/c still hot!!

dan1495

Thanks for all of the replies. The outside temperature was 30 degrees F, which made me wonder also, but it sounds like that might not make much difference.

JackStraw

If 320 dreamer is correct, your loss of power should be highly reproducible, even in cold weather, because you have a broken IC pump and your supercharger shuts down. Does it happen every time you drive it the way you did that day? Maybe you need a few more data points.

dan1495

I agree - I'll take it out this weekend and see what happens. I'm probably going to replace it regardless since it appears to just be a matter of time before it fails.

FLSL55

I think the newest OEM factory pump is reliable as opposed to the older ones. I feel the CM30 has a harder time keeping the flow rate up as the coolant reaches operating temps and above.

I have the new OEM pump in my SL55 and I have the fastest 1/4 mile record for a 100% stock SL55 so you know it's workin!

NikleinR6

Where did you buy the new pump?
What is the part number?
How much was it?

Thanks in advance.
Nick

FLSL55

My car is under warranty. I think the pump is around $360 or so from the local MB dealer.