Oil Pressure Issue
Discussion
Your thoughts please on an oil pressure issue.
Subaru Legacy 2.5 N/A 1997 engine.
On cold start and idle it takes the (aftermarket) oil pressure gauge to the 80psi endstop. (On Monday I will try a different gauge and sender).
Oil is leaking past the front camshaft oil seals.
Initial thought was that the pressure relief valve is stuck closed but I’ve just found the specs which say ‘Hot engine 600rpm 14psi, 5000rpm 43psi, pressure relief valve 85psi’ so on that basis the relief valve may be OK but that does not answer why it is so high.
At present there is no coolant in so I can’t run it up to temp.
Being as hot idle should be >14psi I would not expect it to be 80+ at cold or does someone know otherwise.
Are there any known issues with, say, head gasket failure to the oil passage?
Steve
Subaru Legacy 2.5 N/A 1997 engine.
On cold start and idle it takes the (aftermarket) oil pressure gauge to the 80psi endstop. (On Monday I will try a different gauge and sender).
Oil is leaking past the front camshaft oil seals.
Initial thought was that the pressure relief valve is stuck closed but I’ve just found the specs which say ‘Hot engine 600rpm 14psi, 5000rpm 43psi, pressure relief valve 85psi’ so on that basis the relief valve may be OK but that does not answer why it is so high.
At present there is no coolant in so I can’t run it up to temp.
Being as hot idle should be >14psi I would not expect it to be 80+ at cold or does someone know otherwise.
Are there any known issues with, say, head gasket failure to the oil passage?
Steve
Right, stand down chaps, panic over.
Got the engine up to temp and the pressure came down and settled at 20psi on idle and goes nicely up with the revs.
Thanks for all your thoughts and replies.
All I have to do now is work out why the coolant is reluctant to circulate to both the rad and the heater.
Kitcars, what fun.
Steve
Got the engine up to temp and the pressure came down and settled at 20psi on idle and goes nicely up with the revs.
Thanks for all your thoughts and replies.
All I have to do now is work out why the coolant is reluctant to circulate to both the rad and the heater.
Kitcars, what fun.
Steve
stevieturbo said:
Subaru engines can be very difficult to fill. Do it veeryyyyy slowly, from dry and have the correct quantity of water so you know it has taken all it is supposed to.
If need be remove the bleed pipe off the top of the rad, or the top hose during initial fill as this will help expel air.
But patience is the key.
The engine is in the rear of a kitcar so had no idea how much it would take. Took almost a whole day to fill and I'm not convinced it is done yet. Certainly made plenty of gurgling noises along the way.If need be remove the bleed pipe off the top of the rad, or the top hose during initial fill as this will help expel air.
But patience is the key.
Steve
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