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#46
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See below... http://pages.prodigy.net/jforgione/MB_CTS.html I used on of his switches in my fomer 1991 420SEL and it worked just fine in heavy, So. Calif stop and go traffic. For some reason the W124, with the M103 engines tend to run a tad hotter than othe Benz engines.
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Current Benzes 1989 300TE "Alice" 1990 300CE "Sam Spade" 1991 300CE "Beowulf" RIP (06.1991 - 10.10.2007) 1998 E320 "Orson" 2002 C320 Wagon "Molly Fox" Res non semper sunt quae esse videntur My Gallery Not in this weather! |
#47
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So Far So Good
Hi everyone:
So far so good. Here's a summary of what has happened so far:
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Dr. Brad 2003 C320 4Matic Station Wagon 2002 C240 Elegance 1982 380 SEL Star Certified |
#48
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Try doing what I did. First ground out your Aux. Fan switch to see if the fan works. If it spins, the fan is probably good. Or you could try hooking the fan up to a 12 volt battery and see if it spins. I've learned that if the fan is good, but it doesn't spin at high temperatures, your switch is probably at fault. The fan will only spin when the temperature gets too high...and the temp would definitely rise with the AC on. I've been told that the fan doesn't necessarily turn on when the AC is on, just if it gets too hot. Try changing grounding the switch and let us know if your fan works.
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Dr. Brad 2003 C320 4Matic Station Wagon 2002 C240 Elegance 1982 380 SEL Star Certified |
#49
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The switch appears to have solved my problem. I'm still not sure if the fan is suppose to run whenever the AC is on, or just when the coolant temp rises above 100 degrees.
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Dr. Brad 2003 C320 4Matic Station Wagon 2002 C240 Elegance 1982 380 SEL Star Certified |
#50
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Thanks drbrad for the part number, actually my car (89 300SE) uses a different switch, I got the part number from the dealer. I hope that solves my problem. Thanks again.
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1989 Mercedes 300SE 1992 Mercedes 190E 2.3 1992 Mercedes 300E (3.0) |
#51
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These cars shouldn't run near 100C during normal driving.
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1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200 |
#52
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Current Benzes 1989 300TE "Alice" 1990 300CE "Sam Spade" 1991 300CE "Beowulf" RIP (06.1991 - 10.10.2007) 1998 E320 "Orson" 2002 C320 Wagon "Molly Fox" Res non semper sunt quae esse videntur My Gallery Not in this weather! |
#53
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By 100°C. on the gauge, the thermostat is certainly fully open and the cooling system is doing all it can possibly do with the airflow that it has through the radiator. Radiator airflow is assisted by two different fans and further assisted if the owner would clean the fins periodically. |
#54
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Fin Cleaning
Thanks Brian, LGB and Hattie
What's the best way to maintain the rad? i.e. What's the easiest way to maintain fin cleanliness? I think I'm running within normal range for temperature. The needle typically sits between the 80 degree and 100 degree marks, and only rises to the 100 degree mark when I go up the hill.
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Dr. Brad 2003 C320 4Matic Station Wagon 2002 C240 Elegance 1982 380 SEL Star Certified |
#55
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#56
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Easy!
Thanks Brian:
I did read your previous post on how to clean the rad. I was hoping there might be an easier way to do this. I'm not sure I want to tackle taking the rad out.... Brad.
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Dr. Brad 2003 C320 4Matic Station Wagon 2002 C240 Elegance 1982 380 SEL Star Certified |
#57
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I took the rad out and spent two hours with compressed air and some foaming bath cleanser. It was not all that clean when I finished, although it was significantly better than when I started. Don't even bother to clean it in the vehicle. Next time I use a commercial condenser cleaner or I'm not bothering either. |
#58
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I did several 0-80mph WOT pulls today, 90 degree temps. I just managed to get the needle to almost move a bit, she was almost up to 85C!
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1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200 |
#59
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Hill still the problem
Ok...I've been driving for a few days with the new sensor.
Under all driving conditions the car temp guage remains between 80 and 100....I assume it is running in the high 80s as it is closer to the 80 degree mark. I never hear the Aux. Fan kick in under normal city driving with the ambient temps in the mid 20s. HOWEVER, the temperature continues to rise to just above 100 degrees celcius when I tackle the hill. No matter what the ambient temperature is, the Auxillary fan has to kick in to keep the temperature at just over 100 degrees. The car has NOT boiled, but it sure does rise when put under the stress of driving up the hill. I am seriously considering pulling the rad out and doing the cleaning as Hatterasguy and Brian have suggested. Any other ideas? Brad.
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Dr. Brad 2003 C320 4Matic Station Wagon 2002 C240 Elegance 1982 380 SEL Star Certified |
#60
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I have not mastered the art of the cleaning yet and will make an attempt with condenser cleaner, and, possibly some pipe cleaners. Hold the radiator up to the sun and look between the passages..........you'll see what your task will be. When you get done, it should be perfectly clean through the passages..........not an easy task by any means. If you have any tips after you do the job, please advise. BTW, a temperature of 100°C. is nothing to be concerned about. Two of these will also bump 100°C. on any significant load. |
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