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Old 04-15-2003, 02:34 PM
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Removing A/C

Hello again, it's now heating up outside here in the "Great White North" and I've noticed that my coolant temperature is rising slightly higher than normal.

I had this problem last year, and a repair of my radiator and changing of hoses didn't help. I will go in to a pro this time for my rad flush as I have been doing it myself for the last two years.

I was just wondering if removing the A/C from in front of the rad will help. It currently doesn't work and the compressor was removed, all that remains is a hose conncted to the grill that sits in front of my rad. I'm guessing more air flow to the rad might do the trick.

The temperature, when it goes up, doesn't really rise significantly ( goes closer to 175 than to just in between 175 and the last notch on the gauge) so I figure it's something minor like that.

Please help.



1976 230.4 W115
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Old 04-15-2003, 03:33 PM
G-Benz's Avatar
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Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
Sounds like a Band-Aid approach to the problem...

If you are having cooling problems, you need to find the reason for the overheating. Even if you remove the A/C cooler, you still have an inherent overheating problem.

MB has a pretty sophisticated mechanism in place for monitoring and adjusting components for proper cooling. I wonder if upon removal of the compressor the monitoring circuit for that component was left open? The system will shut down the compressor if freon pressure is too low, or coolant temps reach a prescribed level.

Also, check those auxiliary fans. Do they operate at all? One turns on at some temperature, and the second one kicks at a higher temp. The fan velocity changes as well. A/C operation also affects how the fans operate.

Is the viscous clutch operational on your main fan (the one spun by the serpentine belt). The fan is usually free-wheeling until demand requires the clutch to kick in.

Temperature sensor may not be operating, or the water pump is starting to cause problems.

Bottom line is, there are a myriad of factors that could be affecting your cooling problems, and removing parts that were originally designed with the vehicle is not the way to fix it...
2009 ML350 (106K) - Family vehicle
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