Contents: Removal ↓ Installation ↓
If there are any problems with the oil circulation circuit or if the oil radiator seal is damaged, the relief valve must be removed and checked, as its piston may become stuck in the upper or lower position.
If the valve piston is stuck in the upper position, then the viscous oil (when the engine is cold) under high pressure will be supplied directly to the oil radiator. As a result, the radiator will be damaged.
If the valve piston is stuck in the down position, the liquid oil in a hot engine will follow the path of least resistance and will not pass through the oil cooler, but will mostly drain back into the oil sump. As a result, the engine will not cool well and the shaft journals will not be sufficiently lubricated.
Removal
Using a wide screwdriver, unscrew the threaded plug.
[The original article is posted on the website: VWMANUAL.ru]
Remove the pressure spring and remove the safety valve. A jammed valve piston can be moved using an M10 tap, first screwed shallowly into the piston.
Installation
Before installation, check the valve and hole for damage. If necessary, carefully remove any defects in the hole and replace the valve.
Attention! A valve with a nominal (16.0 mm) or repair (16.5 mm) diameter can be installed.
Install the valve and spring, placing a new gasket under the threaded plug. Tighten the plug to a torque of 25 Nm (2.5 kgfm).
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