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#1
10-13-2006, 11:03 AM
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top radiator hose collapses
on my 87 300D after sitting over night--is this a sign of head gasket problem. No oil in water or water in oil or overheating. Radiator cap is new,engine runs smooth--
thanks Joel 
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#2
10-13-2006, 11:30 AM
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How is the coolant level? Also, when was the last time the hose was changed?
The hose collapse is from a vacuum created by temp difference. Water does not compress, but steam will, and as steam condenses, the pressure decreases to the point that atmospheric pressure is greater than the pressure inside the hose, resulting in a collapse. A waek hose or low coolant level is usually the culprit. CSX had a tank car collapse after workers steam cleaned the interior, during cold weather, and did not vent the car to keep the pressure even. The car collapsed like an aluminum can. I can send you a picture of it.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K 90 Dodge D250 5.9 Cummins/5 speed. 400K Gone and still missed...1982 w123 300D, 1991 w124 300D
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#3
10-13-2006, 11:50 AM
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I would love to see that pic!
-nB
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'83 300D Turbo Current: ???K mi - 19.2mpg -> 17.4mpg -> 22.9mpg  ---> ODO Died  bought at: 233.8K mi - 10MPG  For $1.00  3.5 cylinders work: 320 320 100 340 280 Got insurance? FarmersReallySucks.Com
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#4
10-13-2006, 12:06 PM
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ditto
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#6
10-13-2006, 12:28 PM
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took me 9 seconds on google to find it:
   
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-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#7
10-13-2006, 12:38 PM
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I'd love to know the dimensions of that tank. Hmmm.... 14 PSI times 144 times the area of the tank in square feet...
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1978 Ford F-150 351M 2002 Kia Spectra 1.8l 5-sp 1985 Volkswagen Scirocco 8V 1.8l 5sp 1985 MB 300D Turbo California "Die Natur verabscheut Vakuum"
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#9
10-13-2006, 03:55 PM
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Quote:
Wes
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#10
10-15-2006, 10:50 AM
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Quote:
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#11
10-15-2006, 01:39 PM
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Cool photos!
In answer to the original question, most of the time the vent on the radiator cap is bad causing the hose to collapse because there is supposed to be a check valve vent that allows atmospheric pressure in when needed. You didn't mention the brand/type of cap you bought, but make sure you get the right one, from the dealer if necessary, they are relatively cheap. Try another brand new good quality cap and see if that does the trick. You may have just gotten a bad one, that has been known to happen.
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Marty D. 2013 C300 4Matic 1984 BMW 733i 2013 Lincoln MKz 
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