PRE-RELEASE
Exhaust valve, Z19DTH
| Exhaust valve, Z19DTH |
| To remove |
| 1. |
Remove the cylinder head. See
Cylinder head in situ, Z19DTH
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| 2. |
Remove the camshaft housing from the cylinder head.
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| 3. |
Place the cylinder head in a vice.
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| 4. |
Remove the hydraulic valve tappets.
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| 5. |
Remove the thermostat with gasket.
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| 6. |
Remove the coolant pump with gasket.
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| 7. |
Remove the valve cone using a magnet.
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| 8. |
Remove the upper valve shim, valve spring and extra valve shim (exhaust valve only).
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| 9. |
Remove the valve seal with the assembled lower valve shim.
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| 10. |
Remove the valve.
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| 11. |
Repeat the procedure for the other valves.
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| To fit |
| 1. |
Clean the sealing surface from gasket residue.
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| 2. |
Check that the valves show no signs of damage or that they can stick.
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| 3. |
Fit the valves in their seats.
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| 4. |
Fit the valve seals using the tool
83 94 157 Pliers, valve guide seal
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| 5. |
Fit the lower shims (exhaust valve only).
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| 6. |
Fit the valve springs and the upper shims.
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| 7. |
Fit the valve cone using the tool
EN-46117 Fitting tool
.
Fit the coolant pump with gasket. Tightening torque 20 Nm (15 lbf ft). |
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| 8. |
Fit the thermostat housing with gasket.
Tightening torque 8 Nm (6 lbf ft) |
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| 9. |
Fit the hydraulic valve tappets.
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| 10. |
Place the cylinder head in a vice.
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| 11. |
Fit the camshaft housing.
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| 12. |
Fit the cylinder head. See
Cylinder head in situ, Z19DTH
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