BMW 3 Series Service Manual (E39)

Cvlinder Head Removal and Installation/

Right cylinder head, installing, M62 engine

-Clean cylinder head and block sealing surfaces of gasket debris, making sure no debris drops into coolant or oil passages.

CAUTIOW-

Toprevent valve to piston contact when tightening camshaft sprocket fasteners, counterhold camshaft with 27 mm openend wrench. If necessarq: grind outer side of wrenchjaws to prevent damaging cylinder head.

-Check cylinder head bolt holes and condition of threads. Remove debris and liquids from holes.

4 Check cylinder head locator sleeves (arrows) for damage

CAUTION-

lithe cylinder head has been machined, a special 0.3 rnm (0.011 in.) thickergasket should be installed. The thickergasket is available through an authorized BMW dealer and should be marked accordinglw

-Place new cylinder head gasket over locating sleeve on block.

<The word "OBEN" or " T O P (arrow) printed on the gasket. must face up.

CAUTION-

Male sure the crankshaft, which had been rotated approximately 45" opposite the direction of engine rotation from TDC,is stillin thatposition before installing the cylinder head. All pistons must be out of TDCposition to prevent valve/piston contact

-Install new cylinder head bolts and washers finger tight. Be sure not to remove coating from bolts.

4 Tighten cylinder head bolts in correct sequence (1-10) to stage 1 torque values.

113-78

Cylinder Head Removal and Installation

4 Using a torque angle gauge, tighten cylinder head bolts to specified torque angle in stages 2 and 3.

Tiahtenina- - toraues.

Stage I1

Stage Ill

4 Using BMW special tool 11 3 430, or a 27 mm open-ended wrench, rotate camshafts until marker bores (drilled holes) point upwards (arrows).

Do not damage cylinderhead with wrench. Ifnecessary. grindouter side of wrenchjaws to preventdamagingcylinder head.

4 Install camshaft locking tool set (BMW special tool set 11 2 440) on right cylinder head. Fit tools on cyllnder heads without gaps.

4 Install camshaft locking tool set (BMW special tool set 11 2 440) on left cylinder head. Fit tools on cylinder head without

- 8 " ."

Cylinder Head Removal and Installation

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Using crankshaft center bolt, rotate engine clockwise from the 45" before TDC up to TDC position (OIT aligns with casting mark on cylinder block).

<Lock crankshaft in TDC position with BMW special tool 11 3 200 (arrow).

NOTE-

Special tool boss located at the rear of upper engine oilpan.

- Working at right cylinder head (cylinder 5-8) fit primary sprocltet and chain to camshaft flange.

!

I

4 Press timing chain tensioner rail against timing chain (white arrow) to check that fastener holes are centered in sprocket slots (black arrows).

NOTE-

If necessary, remove sprocl<etand realign position.

Fit sensor gear with mark pointing up (arrow).

Insert bolts and hand tighten.

Cylinder Head Removal and Installation1

Replace sealing O-ring (arrow) in right cylinder head before installing upper timing chain cover.

4 Install oil supply lines and mounting nuts on both heads (ar- rows).

-Using a new gasket, install upper timing chain cover on right head and tighten cover fasteners finger tight.

4Remove right cylinder head cover gasket and install spacing tool (BMW 11 1 411) in place of gasket.

- Install right cylinder head cover fasteners and tighten uni-

-Tighten right upper timing cover retaining fasteners in two passes.

I

Tightening torque

-Reinstall primary timing chain tensioner with new sealing washer.

Tightening torque

-Remove right cylinder head cover and remove special spacingtooi 11 4411.

This group covers cylinder head and valvetrain service and repair. Some of the repair procedures described here require that the cylinder head first be removed as described in 113 Cylinder Head Removal and Installation.

NOTE-

For timing chain and VANOS repair information, see 117 Camshaft Timing Chain.

If it is determined that the cylinder head will require significant reconditioning work, a remanufacturedcylinder head may be a good alternative. Remanufactured cylinder heads are available from an authorized BMW dealer.

The information given in this repair group is organized according to engine code. For engine application information, see I00Engine-General.

For specific repair procedures, refer to the appropriate repair group:

*020 Maintenance

100 Engine-General

113 Cylinder Head Removal and Installation

117Camshafi Timing Chain

=170 Radiator and Coo!ing System

Special Tools

Special BMW tools are required for most cylinder head service described in this repair group. Many of these tools are expensive and only available through an authorized BMW dealer. If the special tools are not available, have the cylinder head removed and disassembled by an authorized BMW dealer. Be sure to read each procedure thoroughly before starting a job to determine which special tools and equipment will be necessary.

Most of the repairs to a cylinder head require precision rnachine work to specific tolerances. This type of work should be performed by an authorized BMW repairfacility or an ASE certified machinist.