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1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

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Old 01-14-2009, 12:36 AM   #1 (permalink)
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97 740il head gasket problem

Radiator was blowing out coolant after running for about 10 minutes. Had heads milled and replaced gaskets. Still creating superheated steam and blowing out coolant, engine doesn't overheat at all, however does show missfire code for 1,2 and 4. Has new thermostat and good water pump. Wondering if it is possible for the block to warp also or if this can be caused from a water circulation problem. Thanks..
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Old 01-14-2009, 11:12 AM   #2 (permalink)
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I wouldnt have thought its anything to do with the block, do you have the stat in the correct way around?, have you over-filled the coolant?, are the plugs new or old ? as for the misfire did you erase all the old codes before starting the car after the rebuild? as they could be old codes.

As for the steam, these engines get very hot very quick, normally if there is to much coolant in there it will get it out on its own.
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