Hi everybody!I just discovered a coolant leak from the water pump housing of my 86 Mercruiser170 3.7 l engine.I read all the threads on that typical for those engines problem,but what I realy want to know is how long will it take before the situation becomes worse and the coolant starts to contaminate the engine oil?In other words can I put some 50 hours on the engine before I have to repair it accordingly?Thank you!