Valve Stem Seals, Removing And Installing, Cylinder Head Removed: Procedure

WARNING: This page is about a different variant/trim than selected.

-- Remove the cylinder head. Refer to CYLINDER HEAD, REMOVING AND INSTALLING .

-- Insert the :VAS6419 in the :VAS6095A .

-- Tension the cylinder head on the cylinder head tensioning device, as shown.

-- Connect the cylinder head tensioning device to compressed air.

-- Slide the air cushion with the lever -arrow- under the combustion chamber onto the valve stem seals that will be removed.

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-- Let enough compressed air flow into the air cushion until it contacts the valve plate.

-- Position the :VAS5161/32-1 on the cylinder head and tighten using the :VAS5161/12 .

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-- Insert the :VAS5161/3A into the guide plate and loosen the stuck valve retainers with a plastic mallet.

-- Install the :VAS5161/6 with the :VAS5161/5 in the guide plate.

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-- Insert the :VAS5161/32-2 with the :VAS5161A/32-3 installed into the guide plate.

-- Engage the :VAS5161/2 at the engaging device and press the installation cartridge downward.

-- At the same time, turn the installation cartridge knurled bolt right until points engage in the valve retainers.

-- Move the knurled bolt left and right slightly. This presses the valve retainers apart and captures them in the assembly cartridge.

-- Release the pressure fork.

-- Remove the assembly cartridge.

-- Remove the guide plate and turn it aside.

-- Remove the valve spring and the valve spring retainer.

-- Remove the valve stem seal using the :VAS6770 .

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NOTE:

There is a risk of damage when installing valve stem seals.

-- Lightly lubricate the valve stem seal sealing lip -A-.

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-- Carefully press the valve stem seal -A- onto the valve guide with the :3365 .

If the valve retainers were removed from the installation cartridge, they must be inserted in the valve insertion device next.

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-- Press the cartridge from above onto the insertion device and valve retainers.

-- Install the valve spring and valve spring retainer, valve spring installed position. Refer to Installed Position Of Valve Spring .

-- Fasten the Guide Plate :VAS5161/32-1 to the cylinder head again.

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-- Insert the Installation Cartridge :VAS5161/32-2 with the Sleeve :VAS5161A/32-3 into the guide plate.

-- Press the pressure fork down and pull the knurled bolt up while turning left and right. This inserts the valve retainers.

-- Release the pressure fork with the knurled bolt still raised.

-- Repeat the procedure on each valve.

-- Install the cylinder head. Refer to CYLINDER HEAD, REMOVING AND INSTALLING .