Cylinder Head Remove and Install

REMOVING CYLINDER HEAD
- Unscrew exhaust pipes on exhaust manifolds and pipe clamp on transmission.

Installation Note:
- Check gaskets, replacing if necessary.
- Coat studs with copper paste.
- Replace self-locking nuts. Torque = 22 ± 2 Nm (16 ± 1.5 ft lb).





CAUTION: BMW anti-theft radios can be rendered useless by disconnecting the battery. Make sure you know the correct code before disconnecting the battery. See your owner's manual for more information.

- Unscrew plug and drain coolant.
- Disconnect battery ground lead.

Installation Note:
- Fill cooling system with coolant and bleed.
- Replace engine oil.




- Disconnect accelerator cable (7), cruise control cable (8) and throttle cable (9).

Installation Note:
- Adjust accelerator cable.
- Adjust cruise control cable.
- Adjust throttle pressure cable.




- Remove cover (10) and cap (11).
- Pull off plug (12) and lift out relay,
- Disconnect wire harness (13).




- Pull off plug (2) and lift out wires.
- Pull out hoses (3 and 4).
- Unscrew hose clamp (5).
- Unscrew pipe (6).
- Disconnect Vent hose (7),
- Unscrew nuts (8) and remove air cleaner with air flow sensor.




- Pull off plug.
- Disconnect fuel return line (8) and water hoses (10).




- Disconnect fuel feed lines and heater hoses (8 and 9).
- Disconnect water hose for expansion tank.
- Pull off vacuum hose.




- Remove bolt (13).
- Disconnect wires (14 end 15) on alternator and starter.
- Lift out end disconnect plugs 116).




- Unscrew ignition lead tube (10) and distributor cap.
- Unscrew diagnosis socket.
- Remove bolts (11).
- Disconnect DME plugs (13 and 17).
- Pull off hose (15).
- Take off cylinder head cover.

Installation Note: Check that gasket seats correctly.




- Connect DME plugs for reference mark and speed signals in such a manner. that gray plug (17) is connected with the plug marked with a ring.




- Pull off plugs on fuel injectors (1 ... 6), cold start valve (7), idle positioner (8), oil pressure switch (9) and throttle (10).
- Unscrew clamp (11) and ground lead (12).
- Disconnect engine wire harness and place aside to the right.




- Remove upper timing case cover.
- Remove chain tensioner piston.
- Open lockplates.
- Unscrew sprocket.

Installation Note: Lockplates are not used again. Tightening torque, Sprocket To Camshaft Flange 6mm 10 Nm (7 ft lb).





Installation Note: Install timing chain that dowel pin (1) is at bottom left when tapped bores are perpendicular to the engine.




- Unscrew cylinder head bolts in order of 14 through 1.
- Insert Special Tools 11 1 063 as shown in picture, to prevent moving or turning of rocker arm shafts.
- Lift off cylinder head.




INSTALLING CYLINDER HEAD:
- Replace cylinder head gasket, Cylinder Head Gasket, Replace.
- Mount cylinder head and tighten bolts (washed and lubricated with oil) in order of 1 through 14 in three steps.
Step 1: Tighten bolts 1 through 6 first, then remove Special Tools 11 1 063 and tighten bolts 7 through 14 afterwards. Tightening torque = 60 Nm (45 ft.lbs)Wait 20 minutes.
Step 2: Tightening torque = 80 Nm (59 ft.lbs.).
Run engine warm 25 minutes.
Step 3: Torque angle = 35 degrees.

CAUTION: Keep oil out of cavities in engine block (danger of cracking block, falsified torque values).

- Reinstall all auxiliary components in reverse order of disassembly, paying close attention to installation notes and torque specs.
- Adjust valve clearance, refer to Valve, Intake/Exhaust,Valve Clearance.
- Check ignition timing.
- Check engine idle speed and CO level.