Oil pressure high!
#1
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Oil pressure high!
Seem to have really high oil pressure with my newly built motor.
FM 2.0l stroker. 99 Miata head. Oil sqirters are removed and plugged, VVT style oil pump. 10W-30 Castrol GTX for break in.
Seems like it makes about 60 psi at Idle when warm. 90-100+ up in the rev range and pegs the needle.
Should I be worried about this?
Bob
FM 2.0l stroker. 99 Miata head. Oil sqirters are removed and plugged, VVT style oil pump. 10W-30 Castrol GTX for break in.
Seems like it makes about 60 psi at Idle when warm. 90-100+ up in the rev range and pegs the needle.
Should I be worried about this?
Bob
#5
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That is pretty high I have some Honda buddies that had oil pressure that high when they got a little carried away shimming there pumps some of them had no problems others blew oil seals out like crazy. I would say it is a combination of the different oil pump and mostly blocking the oil squirters but it still seems really high for a stock pump. If you don't find a way to get it down some you are gonna have a set of broken oil pump gears on your hands.
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Bob
#8
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That is pretty high I have some Honda buddies that had oil pressure that high when they got a little carried away shimming there pumps some of them had no problems others blew oil seals out like crazy. I would say it is a combination of the different oil pump and mostly blocking the oil squirters but it still seems really high for a stock pump. If you don't find a way to get it down some you are gonna have a set of broken oil pump gears on your hands.
Bob
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You could have a possible partial blockage between the block and the head. I assume nothing is making noise? Another thing it may sound weird but throw a new different brand oil filter I have had filters in the past that significantly raise oil pressure but is is really just a blockage. I am not sure where the oil pressure gauge picks up in terms of oil passages but it would be a easy test to check.
#11
speaking of oil filters, make sure yours isn't balooning
definitely a combination of removing 4 significant oil outflows while increasing the oil inflow. I would have expected the oil pressure relief valve to be able to compensate for some of it, but the squirters flow a LOT of oil. Tight bearing clearances?
definitely a combination of removing 4 significant oil outflows while increasing the oil inflow. I would have expected the oil pressure relief valve to be able to compensate for some of it, but the squirters flow a LOT of oil. Tight bearing clearances?
#12
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You could have a possible partial blockage between the block and the head. I assume nothing is making noise? Another thing it may sound weird but throw a new different brand oil filter I have had filters in the past that significantly raise oil pressure but is is really just a blockage. I am not sure where the oil pressure gauge picks up in terms of oil passages but it would be a easy test to check.
Bob
#13
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speaking of oil filters, make sure yours isn't balooning
definitely a combination of removing 4 significant oil outflows while increasing the oil inflow. I would have expected the oil pressure relief valve to be able to compensate for some of it, but the squirters flow a LOT of oil. Tight bearing clearances?
definitely a combination of removing 4 significant oil outflows while increasing the oil inflow. I would have expected the oil pressure relief valve to be able to compensate for some of it, but the squirters flow a LOT of oil. Tight bearing clearances?
I had Clevite and King Engine bearings before now I have ACL Race all were stock clearance. I debated on going with the extra clearance ACL's but didn't do it.
Bob
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Bob
#20
Did you disassemble and de-burr the new oil pump, or did you put it in as delivered from Mazda?
It sounds like your pressure relief valve may be partially stuck.
I've experienced this in the past - it sucks.
I have a high-flow pump, blocked oil squirters, oil pan baffle, and get 25-30 psi at hot idle. ~75-80psi at redline (8500 RPMs).
FWIW, I have had problems with the pressure relief valve on my street car and my track car. For this most recent build, I sealed the stock oil pressure relief valve and am using an external in-line adjustable pressure regulator. Works very well.
It sounds like your pressure relief valve may be partially stuck.
I've experienced this in the past - it sucks.
I have a high-flow pump, blocked oil squirters, oil pan baffle, and get 25-30 psi at hot idle. ~75-80psi at redline (8500 RPMs).
FWIW, I have had problems with the pressure relief valve on my street car and my track car. For this most recent build, I sealed the stock oil pressure relief valve and am using an external in-line adjustable pressure regulator. Works very well.