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Originally Posted by tempfixit
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The reason I am asking this question is that some engines have poor oil passages and are prone to sludge blocking them and eventually causing the oil light to flicker on and off at idle and eventual engine failure.......
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I'm probably not getting the proper picture in my old brain-pan! The flickering light is caused by low oil pressure, ...sensed by a pressure switch, correct? So if sludge somehow blocked the oil passages, restricting oil flow ... wouldn't that make the pressure go higher at the warning light pressure sensor? Mind you, the crank and rod bearings might be getting fried ... but the pressure sensor would be happy as heck!
When I see a low pressure light flickering, I think the oil pump is not pumping enough oil for some reason ... OR ... there is too little restriction to oil flow, such as too much wear space between bearings and crank throws, etc, etc.