Disassembly and repair of the cylinder head (VW Passat B2)

When disassembling the cylinder head, mark the parts to be removed so that they can be put back in their original places when reassembling.

Remove bearing caps No.1 and 3 (the count is taken from the camshaft drive side), then alternately crosswise unscrew the nuts of the studs securing the bearing caps No.2 and 4.

Remove the camshaft from the cylinder head supports and remove the valve lifters.

Install a valve spring compressor on the cylinder head and use pliers with pointed ends to release the valves from the crackers.

Remove the springs with plates.

Remove the valve stem oil seals using an inertial puller.

Remove the valves.

Remove the valve spring support washers.

Clear the details.

Check the degree of wear of the valve guide bushings and the clearance between the bushings and the valve stems.

Insert the new valve into the guide bushing so that the end of the valve stem is level with the edge of the guide bushing, and determine the clearance between the valve stem and the guide bushing using the VW 387 device with an indicator, resting its leg against the valve head.

Replace the guide bushings if the clearance exceeds the maximum allowable limit, which is 1.0 mm for intake valves and 1.3 mm for exhaust valves.

Check whether the flatness of the mating surface of the cylinder head is damaged using a straightedge and a set of feeler gauges.

If necessary, grind the mating surface of the cylinder head within the permissible limits (see subsection "Design and technical characteristics").

Check the condition of the valves and valve springs.



Check the condition of the valve seats and grind them if necessary. Grinding is performed using a special tool and in compliance with the permissible limits (see subsection "Design and technical characteristics").

If necessary, grind the working chamfers of the inlet valves. The working chamfers of the outlet valves are not subject to grinding; grinding of the outlet valves is allowed; in other cases, they are subject to replacement.

Before assembly, as well as after grinding the valve seats and lapping the valves, thoroughly clean the cylinder head.