Honda Bmw 5 Service Manual
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116-15 Cylinder Head and Valvetrain 4 Remove primary timing chain tensioner plug (arrow) and pri- mary tensioner. CAUTION- Primary timinq chain tensioner is under sarina aressure. 4 Remove primary timing chain sprocket and timing chain from exhaust camshaft. - Remove crankshaft locking tool (BMW 11 2 300) from flywheel (installed during VANOS removal). Lift timing chain (holding under tension) and rotate engine counterclockwise 30 from TDC. - Suspend timing chain with mechanics wire
. Cylinder Head and Valvetrain < Remove cylinder head cover retaining studs (arrows) from center and rear of cylinder head. < Remove spark plugs and install BMW special tool 11 3 260 (A) and 11 3 270 (6) to cylinder head. Tighten tool retaining bolts in spark plug bores. Do not overtighten bolts. Tightening torque BMW special tool 11 3 260 I1 1 3 270 to 23 Nm (17 It-lb) cylinder head - Remove intake camshaft bearing cap for cylinder number 1. CA UTIOG Intake camshaft bearing cap 1 is centered with adapter sleeves. To avoid can~sllaft daniage, it must be removed bs- fore any other caps. Turn eccentric shaft on special tool until pressure is applied to camshaft bearing caps. - Remove remaining bearing cap mounting nuts - Slowly release pressure on camshaft bearing caps by turning eccentric shaft. Remove bearing caps and camshaft. Repeat procedure on remaining camshaft. CAUTION- Camshaft bearing caps must be reinstalled in their original lo- cations. NOTE- The camshaft bearing caps are coded with a letter anda number. For example, XI is the first exhaust camshaft bearing cap at the front of the engine, and El is the intalce camshaft bearing cap at the front of the engine. 0 The camshafts are stamped with a code letter - E for the intake side and MA for the exhaust side. 0 E is for Einlap, (German for intake) and XAis for Auspuff, (German for exhaust).
Cylinder Head and Valvetrain 4 Secure hydraulic lifters in lifter bores using BMW special tool 11 3 250, or remove lifters using a magnetic pick-up tool. 4 Remove camshaft bearing carrier from cylinder head. CA UTION- Camshaftbearing carriers must be reinstalledin their original / locations (E for ir;fal
116-18 Cylinder Head and Valvetrain 4 Install camshaft carriers with hydraulic lifters into cylinder head. Note marks on carriers: (E) for intake side and (A) for exhaust side. 4 Center camshaft carrier on pins (arrows) at bearing posi- tions 2 and 7. 4 Install camshafts with number 1 cylinder camshaft lobes fac- ing each other (arrows). CAUTION- A minimum waiting time is required for the hydraulic lifters to bleed down after installing the camshafts into the cylinder head, before bringing the pistons to TDC. When the cam- shafts are removed, the hydraulic lifers can expand. This ex- pansion can cause increased valve lift when the camshafts are bolted down, possibly resulting in piston interference. Camshaft Installation waiting times 68 F (20 C) or above 4 minutes 50-68 F (1 0-20°C) 11 minutes 32-50 F (0-1 0 C) 30 minutes
Cylinder Head and valvetrain1 - Remainder of installation is reverse of removal, noting the following: See 117 Camshaft Timing Chain for VANOS control unit installation. Tightening torques Camshaft bearing caps to cylinder head (M7) 15 Nm (1 1 ft-lb) Cylinder head cover to cylinder head (M6) 10 Nm (89 in-lb) Sparic plugs (M12) 23 Nm (17 ft-lb) Camshaft and lifter, removal and installation (M52 TU and M54 engine) Camshafts and lifters, removing (M52 TU and M54 engine) WARNING- Allow engine fo cool before beginning this procedure. - Disconnect negative (-) cable from battery. CAUTION-- Prior to disconnecting the battea read the battery discon- nection cautions in 001 General Cautions and Warnings. Remove VANOS control unit. See 117 Camshaii Timing Chain. Remove primary timing chain tensioner (arrow). CAUTION- Primary timing chain tensioner is under spring pressure. 1
/Cylinder Head and Valvetrain Press down on secondary chain tensionerand loclc into place using BMW special tool 11 3 292, or a thin drift or pin. 4 Remove exhaust camshaft impulse wheel mounting nuts (arrows). Remove impulse wheel (A). < Remove spring plate (A). 4 Remove intake camshaft sprocket mounting nuts (arrows) and remove spring plate (labelled FRONT).
I_ -. Cylinder Head and Valvetrain Remove torx (arrows). screws from exhausl : camshaft : sprocket Lift off exhaust and intalte sprockets together with secondary chain, thrust spacer (A) from exhaust camshaft, and splined shaft (B) from intake camshaft. CAUTIOf+ Splined shafts share the same part number for both intake and exhaust camshafts. Used splined shafts must be rein- stalled in their oriqinal locations. Place intalte and exhaust sprockets in BMW special tool 11 6 / 180. Position spline gap on intake sprocket (arrow) as shown. 4 Remove exhaust camshaft splined sleeve (A) and shaft (B).
11 6-22 Cylinder Head and Valvetrain Remove secondary chain tensioner mounting bolts (arrows) and remove tensioner with locking tool in place. Remove primary chain sprocket mounting studs (arrows) on exhaust camshaft. NOTE- Counterhold camshafts when loosening. Lifl primary chain sprocket off exhaust camshaft. Remove sprocket from chain.
11 6-23 Cylinder Head and Valvetrain Place timing chain on end of exhaust camshaft 4 Do not remove end spline retaining screws from camshafts (arrows). CAUTION- The end spline retaining screws precisely locate the end splines to the camshafts. Do not loosen these screws. Remove locating studs (arrows) from intake camshaft. Lift off intake camshaft thrust spacer (A) and impulse wheel (B) 4 Remove cylinder head cover mounting studs (arrows) from center of cylinder head. - Remove crankshaft locking tool (BMW special tool 11 2 300) from cranltcase.
..--. I Cylinder Head and Valvetrain - I 4 Lift primary chain and hold under tension, rotate engine against direction of rotation (counterclockwise) approximate- ly 30. To prevent damaging valves while worlcing on camshafts, no aistons should be in the TDC position. - Remove BMW special tool set 1 I 3 240 from rear of cylinder head. Remove retaining nuts (arrows) and bearing cap 1 of intake camshaft. Intake camshaft bearing cap 1 is centered with adapter sleeves. To avoid camshaft damage, it must be removed be- fore anv other caos. 4 Fit BMW special tools 11 3 260 (A) and 11 3 270 (B) to cylin- der head and screw long bolts (aiiows) into spark plug threads. Tensioners will align with the bearing caps on the in- take camshaft. CA UTION-- Do not over torque bolts into spark plug holes. 1 4 Turn eccentric shaft of special tool to pretension intake carn- shaft bearing caps. Remove nuts on remaining bearing caps. - Slowly release tension on eccentric shaft and remove BMW special tools. Remove bearing caps and set aside in order. Remove camshaft and store safely. CA U TIOW- Camshaft bearing caps must be installed in their original lo- cations.