Catenary rule, upper timing chain
Catenary rule, upper timing chain |
1. |
Place the car on a lift, put covers over the wings and detach the negative cable from the battery.
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2. |
Remove the air cleaner with mass air flow sensor and hoses from the turbocharger and camshaft cover.
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3. |
Remove the engine cover.
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4. |
Remove the turbo delivery pipe (2 bolts under the wiring harness).
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5. |
Remove the wiring harness channel from the cylinder head and disconnect the fuel lines from the camshaft cover.
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6. |
Remove the rear centre nut securing the front exhaust pipe to the turbocharger.
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7. |
Raise the car, remove the lower engine cover and the front right wheel.
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8. |
Remove the front part of the exhaust pipe from the turbocharger and lower the car.
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9. |
Place a jack with a wooden block on top under the oil sump and carefully lift the engine to take the weight off the right-hand engine mounting.
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10. |
Dismantle the right-hand engine mounting from the engine and the body.
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11. |
Remove the engine anchorage (the bottom bolt does not need to be removed completely) and raised the engine it bit higher.
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12. |
Remove the camshaft cover.
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13. |
Dismantle the upper timing chain tensioner.
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14. |
Heat both the catenary rule bolts and remove them.
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15. |
Pull the catenary rule upwards and remove it.
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To fit |
1. |
Position the new catenary rule, apply sealant 74 96 284 to the bolts and tighten them.
Tightening torque: 8 Nm (6 lbf ft). |
2. |
Fit the chain tensioner for the upper timing chain with a new gasket.
Tightening torque: 60 Nm (44 lbf ft). |
3. |
Fit the right-hand engine mounting bracket on the engine.
Tightening torque: 47 Nm (35 lbf ft). |
4. |
Fit the right-hand engine mounting to the engine.
Tightening torque: 47 Nm (35 lbf ft). Carefully lower the engine and remove the jack. |
5. |
Make sure the engine is suspended freely and tighten the right-hand engine bracket to the body.
Tightening torque: 47 Nm (35 lbf ft). |
6. |
Apply Molycote 1000 on the turbocharger studs.
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7. |
Raise the car and position the front part of the exhaust pipe with a new gasket and mount new nuts.
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8. |
Tighten the joints in the front exhaust pipe loosely making sure the exhaust pipe is not under strain at any point and then tighten it to the turbocharger.
Tightening torque: 25 Nm (18.5 lbf ft). |
9. |
Refit the lower engine cover and the wheel.
Tightening torque, wheel 110 Nm (81 lbf ft). Lower the car to the floor. |
10. |
Clean any gasket remains from the sealing surfaces on the camshaft cover.
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11. |
Position a new gasket on the camshaft cover. There are sleeves on the bolts on which the gasket fits.
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12. |
Apply sealing compound 87 81 841 to the sealing surface, see illustration.
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13. |
Position the transmission cover on the cylinder head and tighten the bolts.
Tightening torque: 8 Nm (6 lbf ft). |
14. |
Tighten the remaining nuts between the turbocharger and the front exhaust pipe.
Tightening torque: 25 Nm (18.5 lbf ft). |
15. |
Press the fuel lines back into their fastenings and fit the wiring harness channel on the cylinder head.
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16. |
Refit the turbo delivery pipe.
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17. |
Refit the air cleaner with mass air flow sensor and hoses.
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18. |
Connect the crankcase ventilation hose to the camshaft cover and refit the engine cover.
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19. |
Connect the negative cable to the battery.
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20. |
Restore the engine bay to its original condition.
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21. |
Adjust the clock in the car and press 5 times on the remote control lock/unlock button.
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