Question about 2004 Ford F150

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2004 f150 runs fine two minutes ..then no oil 5.4

2004 f150 runs fine two minutes ..then no oil pressure valves ratteling ??

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There is clearly a fault in the oil pressure side.

This could be a blocked oil filter with the bypass valve stuck closed.

Or the oil pressure relief valve could be sticking in the open position.

These are both relativelly easy and cheep things to try first.

Posted on Feb 04, 2010


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This might be as simple as an oil filter draining down and delaying oil pressure during cold starts.Recomend usage of Nissan factory filters as theirs has a built in check valve to minimize bleed down.Also recomend oil no thicker than 5W30. You may be also faced with a hydralic lash adjuster bleeding down causing momentarily loose clearance in the valve rocker assembly. This particular ratlle would be half of crankshaft speed which would indicate upper end rattle.

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