BMW 3 Series Service Manual (E39)

Camshaft Timing Chain1

lnstall timing chain and intake sprocket to intake camshaft on right cylinder head. While pressing in on chain tensioner rail, confirm camshaft flange bores (arrows) are centered in sprocket mounting slots.

NOTE-

Pressinginon rail willremoveslack andrepositionsprockets. If necessarx remove sproclets and align bores centrally.

lnstall intake camshaft sensor gear with notch upward (arrow) at right cylinder head.

-Finger tighten mounting screws.

-lnstall remaining sprocket bolts to intake camshaft finger tight at left cylinder head.

-Press timing chain tensioning rail against timing chain. lnstall plastic wire tie, to hold rail against chain.

-lnstall lower timing chain cover:

Clean sealing surfaces and check sleeves are properly seated.

Apply a thin coat of Three Bond 1209 8 to front and back of new seal. Also coat joints where block meets cylinder heads and oil pan.

Initially hand tighten bolts in alternate sequence to firmly seat cover.

Tighten fasteners to final specification in alternate sequence.

-Replace radial seal in lower timing chain cover, then reinstall crankshaft hub, center bolt, and vibration damper. See Crankshaft oil seal, replacing (M62 and M62TU engines).

-lnstall oil pan with new gasket. See 119 Lubrication Sys- tem.

-Lock crankshaft in place with BMW special tool 11 2 300

Camshaft Timing Chain

4 Replace primary timing chain tensioner oil supply seal (arrow) in right cylinder head.

- Install right upper timing chain cover to engine:

Remove old gasket from left timing cover.

Clean gasket groove and install new gasket.

Apply Three Bond 1209Osealantto joint between cylinder head and timing cover.

Fit timing cover into position on engine and install lower inside cover retaining bolt

Timing cover retaining bolts finger tight.

4 Remove cylinder head cover sealing gaskets from right cylinder head cover. Install BMW special tool 11 1 411 into gasltet groove of cylinder head cover.

Install right cylinder head cover with BMW special tool 11 1 411 to right cylinder head. Fit cylinder head cover retaining nuts to cylinder head cover studs at cylinders 1 and 2 (first two cylinders on right side cylinder bank).

Tighten nuts uniformly in 'Il turn steps.

NOTE-

BMWspecial tool 11 14 11presses upper timing cover to cylinder headto aidinproper sealing of timing chain cover to the cylinder headgasket.

Tightenlng torque

-Remove special tool 11 1 411 and install new gaskets to cylinder head cover:

Clean gasltet groove and install new gasltet.

Apply Three Bond 1209Osealant to joint between cylinder head and timing cover and at half-moon shaped cut-outs.

Tighten cylinder head cover nuts.

[camshaftTimina Chain

<Remove cylinder head cover sealing gaskets from lefl cylinder head cover. Install BMW special tool 11 1 412 into gasket groove of cylinder head cover.

Install lefl cylinder head cover. Fit cylinder head cover retaining nuts to cylinder head cover studs at cylinders 5 and 6 (first two cylinders on left side cylinder bank).

Tighten nuts uniformly in 'I2turn steps

Tightening torque

-Remove special tool 11 1 412 and install new gaskets to cylinder head cover:

Clean gasket groove and install new gasket.

Apply Three Bond 12098sealant tojoint between cylinder head and timing cover and at half-moon shaped cut-outs.

Tighten cylinder head cover nuts.

Tightening torque

-Remainder of installation is reverse of removal, noting the following:

Where applicable remove protective film from gaskets.

Use new gaskets when mounting intake manifold. Tighten nuts finger tight first, then torque to specification in stages worlting diagonally from center out.

Ground straps for ignition coil harnesses are at cylinders no. 3 and no. 7. See 120 Ignition System.

Refill and bleed cooling system as described in 170 Radiator and Cooling System.

Change engine oil and filter as described in 020 Maintenance.

CAUTIOI\C

To preventdamagingengine electricalsystems, besure to install ailground wires previouslyremoved.

Camshaft Timing chain/

Camshaft timing, checking and adjusting (M62 engine)

-Working inside luggage compartment, disconnect negative battery cable.

CAUTIOI\C

Prior to disconnectingbattery cable, readthe battery disconnection cautionsgiven in 001 General Cautions and Warninss.

4 Removing plastic top covers:

Press down on locking pins (arrows) to release locks. Lift intake manifold cover straight up to remove.

Pry out caps from side covers.

Remove fasteners from beneath caDs. Lift off covers.

4 Remove air filter housing and ducts:

Disconnect mass air flow sensor and intake air temperature sensor electrical harnesses (A and B).

Remove air filter housing mounting fastener (arrow).

Release hose clamp at intake air duct on base of air filter housing.

Loosen intake hose clamp (C) and release hose from mass air flow sensor.

Remove hose at idle air stabilizer.

Release hose clamp at throttle body and remove hose.

Remove upper air filter housing with mass air flow sensor.

- Unbolt left and right side cable ducts from fuel rail.

(A).

Remove left and right side ignition coil mounting fasteners and coils.

NOTE-

Make note of location of ground strap (arrow).

Remove sparlc plugs.

-Remove positive (+) terminal cable from left cylinder head cover.

-Unbolt cable ducts from fuel rail at left and right sides.

Disconnect fuel injector electrical connectors from injectors: Pry corner of wire loclc clip (arrow) to release connector. Repeat for remaining injectors.

*Lift off wiring ducts.

Camshaft Timing chain1

- -- -

Using crankshaft center bolt, turn engine clockwise until number one cylinder (right head) is in TDC overlap position, as shown (arrows).

NOTE-

Numberone cylinder is at valve overlap when both the intale and exhaust valves are starting to open.

<Loosen accessible bolts (arrows) on right exhaust and intake camshafts (cylinders 1-4) approximately 'I2turn.

NOTE-

When loosening bolts on camshaft sprocket, counterhold camshaft using an 27 mm open-end wrench. I f necessary. machine wrench accordingly to prevent damage to head.

Repeat for accessible bolts of left exhaust and intake camshafts (cylinders 5-8).

Using crankshaft center bolt, rotate engine one complete rotation to TDC position. Lobes of camshafts for right cylinder head (cylinders 1-4) should point to each other (arrows).

-Loosen remaining intake and exhaust camshaft sprocltet bolts approximately 'I2turn.

Camshaft Timing chain/

-Tighten accessible sprocket retaining bolts in the following order:

Leit exhaust camshaft

Right exhaust camshait

Leit intake camshaft

Right intalte camshait

-Remove BMW special tool 11 2 300 from tool bore at bellhousing and remove camshaft loclting tools from cylinder heads.

Using crankshaft center bolt, turn engine over clockwise at least one comolete rotation so that remainino- camshaft sprocltet retaking bolts are accessible.

- Tighten remaining camshait sprocket retaining bolts

-Remove BMW special tool 11 3 390 from primary timing chain tensioner bore and reinstall primary chain tensioner

-Remainder of installation is reverse or removal, noting the following:

Remove gasket residue from cylinder head sealing surface.

Apply a thin bead of Three Bond 1209 O sealing compound to joints at cylinder head cover and timing case cover and at half-moon sections at rear of cylinder heads.

Replace cylinder head cover gaskets if necessary.