jbdkz
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Joined: Jul 2007
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Karma: 0 |  | Losing oil pressure
« Result #1 on Jul 17, 2007, 9:17pm » | ![[Quote]](http://s4.images.proboards.com/buttons/quote.gif) |
I have a 78 Bronco, the odometer reads 34,000 but I bet the true mileage on it is about 134,000. It has a 351M engine. I'm not sure if the engine has ever been rebuilt, replaced, or is the original. When the engine is cold the engine oil pressure is within the high normal section of the guage on the dashboard. As the engine heats up the oil pressure starts to drop but is still within the normal limits on the guage until I sit at a stop light for awhile, then it drops below the normal pressure range on the guage. Once I get the engine up to speed while driving again the oil pressure goes into the normal range on the low side. I am using 10W30 motor oil as specified in the Haynes manual.
I am thinking there is somthing wrong with the oil pump but am hoping the problem is something else.
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