RonD
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- Jun 2, 2012
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- Vehicle Year
- 1994
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- Ford
It is the oil.
Oil pressure is from back pressure at the bearings.
The thicker the oil the harder it will be to squeeze out thru the bearing surfaces.
This is why 6psi is fine at idle, any psi means there is more oil than can be squeezed out at the bearings, so a back pressure builds up.
But below 3psi is when gravity comes into play as far as pushing oil up to the valve train, you start getting the ticking of lifters at around 3psi at the oil sender.
High oil pressure is bad because the oil starts to spray out at the bearings, this produces less lubrication and cooling, so higher bearing temps
Oil pressure is from back pressure at the bearings.
The thicker the oil the harder it will be to squeeze out thru the bearing surfaces.
This is why 6psi is fine at idle, any psi means there is more oil than can be squeezed out at the bearings, so a back pressure builds up.
But below 3psi is when gravity comes into play as far as pushing oil up to the valve train, you start getting the ticking of lifters at around 3psi at the oil sender.
High oil pressure is bad because the oil starts to spray out at the bearings, this produces less lubrication and cooling, so higher bearing temps
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