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#31
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There has been some talk in the past about poor sealing surfaces on the thermostat. Since this is a bypass system it's possible that is causing your problem. I would think a non-contact thermometer would show this problem since the radiator would be pretty cool but the block pretty hot.
Check the oil cooler too with the thermometer.
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#32
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It seems that the problem is the car can't throw the heat off when the ambient temperture is high. so, something can't dissipate the heat. WP is ok and pushes the coolant thru the rad. rad can't get rid of heat. bad rad? Maybe you have to look at more than the fins. rad could be plugged with excess permatex you mentioned earlier? Get that IR tem gauge. great investment. I used mine to check gauges and found one of mb temp gage off by 10 degrees too hot.
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71 220D 169K wrecked 83 240D 118K sweet 4 speed 91 350SDL (one of the 60% good engines) 156K 84 300d (loaner to my sister) 189K 79 300SD (partswagen) 86 420SEL partswagen 70 220d (partswagen) 68 280s GASSER!!! under construction now 85 300sd 310K miles winter beater car retired 93 300d 2.5 turbo 168K wife's car 83 280SL euro 5 speed 155K 69 250S newest project 54K |
#33
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Had similiar problem in a 455 olds. Problem was small leak(s) between the combustion chamber and a water jacket, brought on by a bad thermostat that caused a slight overheat. Fixed only by head gasket replacement.
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