Valve seal, front
Valve seal, front |
To remove |
Important | ||
Store all removed valve parts in the valve stand 83 93 787. |
||
1. |
Remove the
Camshaft cover, front, B284
|
2. |
Open the expansion tank cap and relieve any excess pressure.
|
3. |
Raise the car.
|
4. |
Undo the right-hand side of the spoiler shield.
|
5. |
Place a suitable receptacle under the radiator. Connect a hose (A) to the radiator and drain the coolant. Close the cock and refit the spoiler shield.
|
6. |
Remove the
Starter motor, B284.
|
7. |
Remove
Engine mounting, right
|
8. |
Lower the car.
|
9. |
Remove the spark plugs.
|
10. |
Remove the coolant port (A).
|
11. |
Remove the camshaft solenoid valve (695F) (B).
|
12. |
Remove the camshaft position sensor (555F) (C).
|
14. |
Raise the car.
|
15. |
Fit
EN-46106 Flywheel locking attachment
(A).
|
16. |
Lower the car.
|
17. |
Mark the chain and camshaft sprockets so they can be refitted in the same position (A).
|
18. |
Loosen the torque on the bolts (B) holding the camshaft sprockets. Counterhold using an open spanner on the camshaft flats (do not remove the bolts).
|
20. |
Tighten EN-48313 Fixing tool manually so that the chain is unloaded. Counterhold using an open spanner so that the tool does not turn.
|
21. |
Remove the camshaft sprocket bolts.
|
22. |
Remove the sprockets from the camshafts.
|
24. |
Lift out the camshafts and note the rear marking on the camshafts. (B) The last letters in the marking: LI = intake camshaft, front cylinder bank. LE = exhaust camshaft, front cylinder bank.
|
25. |
Remove the roller rockers and the hydraulic adjuster elements (A). Store them in
83 93 787 Valve stand
so they do not get mixed up.
|
26. |
Fit
EN-46110 Valve spring depressor
(A).
|
27. |
Fit
83 94 173 Air nipple for spark plug hole
. Connect compressed air and put the piston and valves under pressure (A).
|
28. |
Press down the valve plate with
EN-46110 Valve spring depressor
(B).
|
29. |
Remove the valve cone with a magnet (A).
|
30. |
Lift out the spring plate and valve spring (A).
|
31. |
Lift out the valve guide seal using
83 94 157 Pliers, valve guide seal
(A).
|
To fit |
1. |
Clean all parts and check contact surfaces and bearing surfaces for wear.
|
2. |
Fit the valve guide seal using
83 94 157 Pliers, valve guide seal
.
|
3. |
Fit the valve spring and spring plate.
|
4. |
Press down the valve plate with
EN-46110 Valve spring depressor
.
|
5. |
Fit the valve cone using
EN-46117 Fitting tool
.
|
6. |
Unload the valve and remove
EN-46110 Valve spring depressor
.
|
7. |
Disconnect the compressed air and remove the air nipple.
|
9. |
Fit the bearing caps as illustrated (markings on caps). Start where the cams point down and load the tappets. Note: Tighten the bolts in stages - 1/2 to 1 turn.
Tightening torque 10 Nm (7 lbf ft)
|
10. |
Fit the sprockets with chain on the camshafts. Tighten the bolts by hand.
|
11. |
Check that the marks on the chain match the markings on the sprockets.
|
12. |
Remove EN-48313 Fixing tool.
|
13. |
Tighten the bolts of both camshaft sprockets (B), counterholding with an open spanner on the camshaft flats.
Tightening torque: 65 Nm (48 lbf ft) |
14. |
Fit the camshaft position sensor (555F) using a new gasket (C).
Tightening torque: 10 Nm (7 lbf ft) |
15. |
Fit the camshaft solenoid valve (695F) using a new seal (B).
Tightening torque: 10 Nm (7 lbf ft) |
16. |
Fit the coolant port using a new seal and gasket (A).
Tightening torque: 10 Nm (7 lbf ft) |
17. |
Fit the spark plugs.
|
18. |
Fit
Engine mounting, right
.
|
19. |
Raise the car.
|
20. |
Remove
EN-46106 Flywheel locking attachment
(A).
|
21. |
Fit the
Starter motor, B284
.
|
22. |
Lower the car.
|
23. |
Fit the
Camshaft cover, front, B284
.
|
24. |
Charge and bleed the cooling system. See
Bleeding and charging the cooling system
.
|