FYI I have had two turbodiesels with blown headgaskets and neither of them overheated unless I really pushed it. If the HG is blown it will heat up under load, but should not go crazy when you are just cruising on the highway or around town. If your temp problems are occurring under different conditions, something else is possibly going on and it's worth your time to figure out what it is.
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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