A8L V8-4.2L (BFM) (2004)
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Secure the (VAS 5161/7) with the (VAS 5161/12).
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Insert the (VAS 5161/3) into the guide plate and loosen the stuck valve retainers using a plastic hammer.
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Install the (VAS 5161/6) with the (VAS 5161/5) into the (VAS 5161/7).
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Guide the (VAS 5161/8) into the (VAS 5161/7).
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Install the (T40012) with gasket by hand into the respective spark plug hole and apply constant pressure.
‹› Minimum pressure: 6 bar pressure
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Engage the (VAS 5161/2) at the (VAS 5161/6) and press down the (VAS 5161/8).
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At the same time, turn the knurled bolt of (VAS 5161/8) to the right, until the points engage in the valve retainers.
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Lightly move the knurled bolt back and forth, causing the valve retainers to be pressed apart and be captured in the (VAS 5161/8).
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Release the pressure fork.
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Remove the (VAS 5161/8).
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Remove the (VAS 5161/7).
‹› Pressurized air hose remains connected.
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Remove the valve stem seal using the (3364).