Help Diagnosing Oil leak

[lspann3525]

Do the AFM Deflector actually help with consumption??

Also does the orientation of the holes on the oil pressure relief valve matter??? I remember when I installed my new oil pan I didnt pay attention to which way the oil holes were aligned on the oil pressure relief valve ??

 

[rdezs]

Doesn't matter which way the holes are oriented. The valve actually exists for AFM equipped engines, to relieve the oil pressure if it reaches something like 65 PSI. 65 and over PSI can damage the solenoid that activates the AFM when it shuts down four cylinders. In theory that should never happen, the pressure relief valve in your oil pump is around 35 PSI with hot oil. But I suppose on a cold engine with cold oil revved up over 2,000 RPM pressure could Spike, hence the extra valve. If you drive it normally until it warms up, meaning you don't drive like Mario andretti on a cold engine... The valve should never open. However, like all such valves, they get week over time and start to bleed off oil pressure. Which is why it's a good idea to replace it when you're doing your o-ring in there. Prolonged bleeding off of pressure is what I suspect led to many people experiencing oil consumption issues, with a steady flow of oil spraying on the cylinder walls below the piston. If you do not have AFM you do not need the valve. GM used the same oil pan across several engines, so it's not unusual to find the valve on an engine where it's not needed.

 

[lspann3525]

Doesn't matter which way the holes are oriented. The valve actually exists for AFM equipped engines, to relieve the oil pressure if it reaches something like 65 PSI. 65 and over PSI can damage the solenoid that activates the AFM when it shuts down four cylinders. In theory that should never happen, the pressure relief valve in your oil pump is around 35 PSI with hot oil. But I suppose on a cold engine with cold oil revved up over 2,000 RPM pressure could Spike, hence the extra valve. If you drive it normally until it warms up, meaning you don't drive like Mario andretti on a cold engine... The valve should never open. However, like all such valves, they get week over time and start to bleed off oil pressure. Which is why it's a good idea to replace it when you're doing your o-ring in there. Prolonged bleeding off of pressure is what I suspect led to many people experiencing oil consumption issues, with a steady flow of oil spraying on the cylinder walls below the piston. If you do not have AFM you do not need the valve. GM used the same oil pan across several engines, so it's not unusual to find the valve on an engine where it's not needed.

I know for sure I have AFM. Im thinking of the doing the Deflector to improve oil consumption

 

[rdezs]

You have 275,000 mi and the AFM/DOD is still functioning? That's impressive in itself.

Oil consumption at that mileage is probably multiple items. Valve guides, valve stem seals, rings, worn pistons and bores. I wouldn't drop the pan to put that deflector on the new oil pressure relief valve. Have you ever seen 65 PSI or higher oil pressure? If not, that valve isn't even opening.

Engines can run a long time in worn out condition. The point it gets to be too much is when it starts messing up your O2 sensors and plugs your catalytic converters. If you don't want to rebuild it, drive it till it won't drive anymore.... Then go shopping.