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#61
07-18-2006, 10:58 AM
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Quote:
What is a WOT pull?
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Dr. Brad 2003 C320 4Matic Station Wagon 2002 C240 Elegance 1982 380 SEL Star Certified 
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#62
07-18-2006, 11:01 AM
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Wide Open Throttle
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#63
07-18-2006, 11:01 AM
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Quote:
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RM Smith 1988 560SL "Where is it again that we are going, and why are we in this handbasket"?
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#64
07-18-2006, 11:14 AM
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[QUOTE=Brian Carlton]This task is not the most simple of tasks.
The solution is the use of a commercially available condenser cleaner in conjunction with compressed air. Careful use of a pressure washer will also assist in the task, but, extreme care must be used to prevent bending any fins. You can buy this solution at most plumbing supply shops..... this is what the home repair guys put on your a/c condensors and then charge you 189 dollars for..... it now comes in a non-acid formula...very safe.... costs about 15 dollars a gallon... then you can do your home unit once a year....
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1989 300ce 129k ( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone) 1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus 1994 e320 Cabriolet 108k  1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it [/SIGPIC]
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#66
07-18-2006, 11:31 AM
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Quote:
Burns carbon deposits.
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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!
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#67
07-18-2006, 12:42 PM
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Dr. Brad:
Have been reading this thread today, and thought I might add to the 'diagnostic algorithm'... Don't think enough attention has been paid to the possibility of a dying water pump. Had a situation very similar to yours a few years back (no, no mountains in New York City, but a few very hot days with nasty stop-and-go traffic). Symptoms: water pump was gradually weakening, with the gradual loss of coolant at the pump's 'weep hole' as others have noted here. But it still worked for a heck of a long time - (months!), with the car driven virtually every day. Assumption?: water flow was at least adequate for most situations. It boiled over once when pressed, fully loaded, on a very hot day. Clearly, your mountain climb is this stressor. By the way, when healthy, this car never gets to 90 degrees under any driving conditions. Radiator was replaced about ten years ago, but because of a leak, not for overheating. Also, though apocryphal: I think the car runs cooler since I started using full-synthetic oil (many years ago). On the coolant: Ethylene Glycol is Ethylene Glycol, whether expensive or cheap, and whether USA or German-manufatured... Yes, chemically, there is a coolant-water ratio which is the optimal one for cooling, but this optimization is marginal - it wouldn't account for 20 degree difference in running temp. Auxiliary Pump: Very important, but mostly to handle the augmented thermal load - which is huge! - produced by the A/C condenser. Its primary purpose is to make this recondensation of the A/C coolant more efficient, thereby lowering the strain on - and increasing lifespan of - the entire A/C system. I am in the process of rebuilding mine myself, saving a several hundred dollar replacement with about $10 in parts. Point is, with the A/C off, the aux fan should not even enter the calculus re engine cooling. In fact, even with our 100-degree weather these days, with the A/C running, and with the aux fan out of the car while I fix it, the car is still running cool. Granted, my beast is a diesel, so runs cooler anyway, but still... Differential Diagnosis: R/O impending H20 pump failure. The Patient's Care Plan: Normal activity, including daily stress test. Monitor fluid output carefully! Lou PS - Have given up my practice so I'll have more time to work on my car!
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#68
07-18-2006, 02:16 PM
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I just got back home from an errand. It is 97°f outside now and my temperature gauge was on about 115°c in town. It wenr back down to 100°c back on the highway and even a little lower.
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2004 Toyota Sequoia Limited 4wd 1991 Lincoln Town Car Executive 1991 Cadillac Sedan DeVille 1988 Mercedes 300SEL 1972 Chevrolet Caprice Kingswood Estate 9-passenger wagon 1973 Pontiac Grand Ville (Prior MB's: 1974 240D, 1985 380SE, 1984 190D, 1993 400SEL)
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#69
07-18-2006, 02:26 PM
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Quote:
drain it, clean it....run it with water around town..... see what happens. i do discount the clogged exterior fin thing a bit.... but with a 20 year old car you never know..... the fins on my home condenser get pretty darn dirty in a couple of years... that's why i clean them once a year....
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1989 300ce 129k ( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone) 1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus 1994 e320 Cabriolet 108k 1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it [/SIGPIC]
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#70
07-18-2006, 02:28 PM
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Quote:
zerex and mb coolant are better aluminum protectorants. the best combination is probably water and water wetter... but then you wouldn't have any anti corrosion protection
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1989 300ce 129k ( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone) 1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus 1994 e320 Cabriolet 108k 1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it [/SIGPIC]
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#71
07-18-2006, 05:50 PM
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100-103 degrees today, AC blasting about as high as it will go. Driving in stop and go traffic, and it was up to 90C.
These cars should never run over 100C if the cooling system is in shape.
__________________
2016 Corvette Stingray 2LT 1969 280SE 2023 Ram 1500 2007 Tiara 3200
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#72
07-18-2006, 10:01 PM
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Heavens. Then I suppose that mine is not in proper working order. It was 97° here today, one of the hottest days we have had this year, so I was interested to see how high the gauge would go today. I did not even have my A/C on and it went to 3/4 way up on the scale.
 I do not even care anymore... what, with the stalling when the engine heats up and the not knowing when the timing chains were replaced and the worn camshaft, I will just drive it as long as it will go. I have already got my $1000.°° worth out of it.  I am guessing that my radiator may be clogged, since someone has been using "GREEN" coolant in the cooling system.  Quote:
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#73
07-18-2006, 10:26 PM
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Don't worry the chains will snap before it overheats!
__________________
2016 Corvette Stingray 2LT 1969 280SE 2023 Ram 1500 2007 Tiara 3200
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#74
07-19-2006, 05:47 PM
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Quote:
I also drove up the hill to pick up my son, then went down the hill and came back up, all within about 15 minutes, and the temperature guage rose to 100 degrees...mind you the aux. fan had kicked in.... So, she's still running hot, but not boiling over yet...we're suppose to hit the high 30s this weekend so we'll see how she hold out. I may pull the rad out this weekend and try to clean it. I'll post a picture and let me know if you think its dirty.... Brad.
__________________
Dr. Brad 2003 C320 4Matic Station Wagon 2002 C240 Elegance 1982 380 SEL Star Certified
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#75
07-19-2006, 05:51 PM
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Quote:
I considered the water pump in the differentials, but concluded that since the cooling system appeared to be well hydrated and not losing any fluids, I ruled it out. However, I will continue to monitor her fluids and report back to you after 48 hours. Cheers, Brad.
__________________
Dr. Brad 2003 C320 4Matic Station Wagon 2002 C240 Elegance 1982 380 SEL Star Certified
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