I can't remember and can't find it online. Does the pulley side of the engine pressure relief piston go into the engine flat end first with the hollow side toward the spring or vice a versa?
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Hollow side toward the spring, I think; or down when the engine is rightside up.
http://www.vw-resource.com/oiling_system.html
Look at 4:19 here:
Actual wrenches please correct me if I'm wrong.
The plunger in my engine looks much different than the one pulled out in the video above. I assembled it back with the hollow side facing the spring as Ed has said. I found a pic of what mine looks like.
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@Jimmy V. posted:I assembled it back with the hollow side facing the spring
You assembled it correctly. The one on the pulley side is basically a thermostat controlled by the oil pressure (cold = higher pressure). It bypasses the oil cooler until the oil heats up and the pressure goes down.
The piston on the flywheel side controls oil pressure by limiting oil flow from the galleys through the pressure relief return hole to the crankcase. You can buy replacement caps for this one with an adjustment screw that allows you to dial in whatever oil pressure you want, within the limits of the weight of the oil that you are using.