Timing Components: Service and Repair
LOCKING ENGINE 90 DEGREES AFTER TDC1. Disconnect negative battery cable.
NOTE: Rotate the engine by the front crankshaft bolt until the line next to the bolt in the front crankshaft hub reaches 12 o'clock. Rotate the engine another 1/4 turn to the right, or the three o'clock position. This will assist approximating the location of 90 degrees ATDC.
2. Rotate engine by hand until special tool VM 1080 can be install through the engine access hole, locking the flex plate and preventing crankshaft movement. This locks the engine at 90° after TDC.
3. Remove engine cover.
4. Remove EGR valve and EGR cooler to exhaust manifold retaining nuts.
5. Reposition EGR valve assembly out of way
6. Remove plug in cylinder head cover/intake manifold.
7. Insert VM.1053 to lock exhaust camshaft in position.
8. Remove generator.
9. Remove plug in cylinder head cover/intake manifold.
10. Insert VM.1052 to lock intake camshaft in position.
11. At this point the timing belt can be removed for service.
12. After engine service is completed and timing belt reinstalled, remove both camshaft locking pins from cylinder head cover/intake manifold.
13. Install both camshaft access plugs.
14. Remove 90� after TDC engine locking pin.
15. Install generator.
16. Install engine cover.
17. Connect negative battery cable.