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Radiator Cycle 200

posted by  rahall84 on  Fri Jun 10 14:45 CST 2005
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last visit: Thu Dec 15 19:51 CST 2011
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I am having trouble with a 1984 242 turbo. It is overheating and then I'm getting a nocking sound. I stopped and saw that teh top hose to the radiator was hard. Is this a thermostat problem or a radiator problem? Not sure which way the fluid moves and I couldn't find it in Bentley's.








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Radiator Cycle 200

posted by  Trev29 on  Fri Jun 10 23:31 CST 2005
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last visit: Fri Oct 17 05:56 CST 2014
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If the top hose of the rad is hard, maybe your rad is plugged.
--
1980 245 Canadian B21A with SU carb and M46 trans








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Radiator Cycle 200

posted by  runwld2 on  Fri Jun 10 17:02 CST 2005
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last visit: Tue Sep 30 13:11 CST 2014
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Fluid flows in the top hose, out the bottom.
You can remove the thermostat and see if that helps, but if the upper hose or radiator is hot, then it's open and not the problem.
If the car is OK at idle, but overheats at speed, then suspect the radiator.
If overheats at idle, then maybe the fan clutch.
All these could be OK, and it could be overheating from a compression leak into the water jacket (blown head gasket).
Knocking indicates high combustion temps.
--
744 & 745 16v 4+OD, 245 SE auto, 242Ti 4+OD, 245DL auto parts car








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Radiator Cycle 200

posted by  rahall84 on  Tue Jun 14 04:05 CST 2005
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last visit: Thu Dec 15 19:51 CST 2011
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I removed the thermostat and radiator. I cleaned the radiator and reinstalled it. I'm still getting the knocking after driving for about 5 min. Its not as pronounced as before but still there. Any thoughts?

Rob
'84 242 turbo







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