BMW 3 (E46). Instruction - page 47

Fit thrust spacer to intake camshaft
and tighten down with threaded
locating studs (place longer threaded
portion of studs into camshaft).

Tightening torque

Impulse wheel
studs to intake
camshaft (M7)

20 Nm (15 ft-lb)

Fit top sprocket to primary timing chain
and install on exhaust camshaft so that
pointer on sprocket (arrow) lines up
with cylinder head sealing surface.

Insert BMW special tool 11 4 220 into
timing chain tensioning piston bore and
bring adjustment screw into contact
with tensioning rail, but do not
pretension timing chain.

Note:

BMW special tool 11 4 220 is a dummy
primary chain tensioner and simulates
the function of the tensioner.

-

Recheck that arrow on top primary
sprocket is aligned with upper
edge of cylinder head. Reposition
sprocket if necessary.

Insert and tighten down threaded
locating studs (arrows) in end of
exhaust camshaft.

Tightening torques

Tightening torques

Exhaust camshaft
locating stud

20 Nm (15 ft-lb)

Install secondary chain tensioner on
cylinder head (arrows). Keep tensioner
compressed using BMW special tool 11
3 292 or suitable pin.

Fit exhaust camshaft splined sleeve.
Confirm that gap in sleeve splines
aligns with corresponding gap in
camshaft splines (arrows).

Slide splined shaft onto exhaust
camshaft. Be sure that locating tooth of
shaft (arrow) fits into spline gaps of
camshaft and splined sleeve.

Slide splined shaft in further until
three small slots on splined sleeve
are centered on three threaded
holes in primary chain sprocket.

Place intake and exhaust sprockets in
BMW special tool 11 6 180. Position
spline gap on intake sprocket (arrow)
as shown and place secondary chain
on sprockets.

Remove chain and sprockets from tool
and slide sprockets on camshafts.
Confirm that gap in intake sprocket
splines lines up with corresponding
gap in camshaft splines (arrow).

CAUTION!

Do not alter position of sprockets
with respect to chain when removing
from special tool 11 6 180.

Slide splined shaft onto intake
camshaft until approx. 1 mm (0.04 in.)
of splines (arrows) are visible. Confirm
that locating tooth of shaft fits into
spline gaps on camshaft and sprocket.

Install intake camshaft spring plate so
that FRONT mark is visible. Install
mounting nuts (arrows) finger tight.

Insert sprocket mounting bolts
(arrows) on exhaust side camshaft

assembly.

Initially tighten to approx. 5 Nm
(44 in-lb) and then back off by half
a turn.

Fit thrust spacer (A) on exhaust
camshaft.

Install spring plate (A) to exhaust
camshaft. Make sure that F mark is
visible.

Note:

If F mark is no longer visible, install
spring plate so that convex side points
forward (toward front of car).

Install exhaust camshaft impulse
wheel, aligning pointer (B) with top
edge of cylinder head (A). Install
mounting nuts (arrows) finger tight.

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