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Thread: Coolant loss
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Old 02-02-2018, 07:04 PM   #9
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The basic engine design is the same on the mk3 as it is on the focus rs models. The loss of coolant which is being describe is the similar discription that the RS model is experiencing. The test and fix is straight forward, pressure test, if loss of pressure is more than 5psi over a 5 hour window, head gasket, if the loss is severe, borascope to see if fluild is on the piston surface, if yes then the head is replaced. Not that the motors are the same but they are really very very similar.
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