Cylinder Head, Installing

Cylinder Head, Installing

Special tools, testers and auxiliary items required

• Crankshaft Holder (3242)

• Camshaft Clamp (T40070)

• Locking Pin (T40071)

Procedure

Tightening specifications:

• => [ Cylinder Head Overview ] Cylinder Head Overview

• => [ Cylinder Head, Tightening Specifications and Sequence ] Cylinder Head Overview


The sealing surfaces could be damaged.

• Carefully remove sealant residue from the cylinder head and cylinder block.

• Make sure that no long scrapes or scratches result.

Risk of damaging cylinder block.

• No oil or coolant must be in the cylinder head bolt blind holes in the cylinder block.

Risk of leaks in cylinder head seal.

• Carefully remove sealant residue from the cylinder head and cylinder block. Make sure that no long scrapes or scratches result.

• Carefully remove all grinding and sanding residue.

• Only unpack new cylinder head gasket immediately prior to installation.

• To prevent cylinder head seal silicone layer and recessed area from being damaged, always handle seal extremely carefully.

Risk of damaging open valves.

• If a replacement cylinder is installed, only remove plastic base right before cylinder head is installed to protect open valves.

Risk of damaging valves and piston heads after working on the valve train.

• To ensure valves do not strike pistons when starting, carefully rotate engine at least 2 full revolutions.

• Replace bolts that are tightened to the specification.

• Replace self-locking nuts, sealing rings, seals and O-rings.

• If a replacement cylinder is installed, the contact surfaces between the hydraulic adjusting elements, roller rocker levers and cam running surfaces must be lubricated before installing the cylinder head cover.

• Secure all hose connections with hose clamps appropriate for the model, refer to the Electronic Parts Catalog (ETKA).

• It is necessary to replace all the coolant and engine oil whenever the cylinder head or the cylinder head gasket are replaced.

- Check whether camshafts of both cylinder heads stand in "TDC" position.






• (T40070) mounted on both cylinder heads and tightened to 25 Nm - arrows -.

• (3242) connected.






• The following illustrations show the left cylinder head instead.






- Set cylinder head gasket in place.

• Pay close attention to alignment bushings in cylinder block - arrows -.

• Cylinder head seal installation position: Identification "oben" (top) or the cylinder head part number.

- Set cylinder head in place.

- Tighten the cylinder head bolts. Refer to => [ Cylinder Head, Tightening Specifications and Sequence ] Cylinder Head Overview.






• There is no requirement to tighten the cylinder head bolts after repairs.

- Tighten the locking bolt - arrow -.






- Check if the guide rail for the camshaft timing chain tensioner is secured with the (T40071).






• If the tensioning element was removed from the chain tensioner, then the installation position must be noted: Hole in housing floor faces toward chain tensioner, piston faces toward tensioning rail.

• Ignore - arrow -.

- Clean the chain tensioner oil strainer - 2 -.






- Position a new seal - 3 - on the rear of the chain tensioner - 1 -.

- Insert the chain tensioner and position the camshaft timing chain as shown in the illustration.






- Fasten bolts - 1 and 2 -.

Install in reverse order of removal paying attention to the following:

- Install the cylinder head cover. Refer to => [ Left Cylinder Head Cover ] Left Cylinder Head Cover, => [ Right Cylinder Head Cover ] Right Cylinder Head Cover.

- Install the high pressure lines and the intake manifold.

- Position the camshaft timing chain on the camshafts => [ Installing ] Camshaft Timing Chains.

- Install the timing chain covers. Refer to => [ Left Timing Chain Cover ] Left Timing Chain Cover, => [ Right Timing Chain Cover ] Right Timing Chain Cover.

- Change engine oil.

- Replace coolant => [ Filling ] Service and Repair.