Timing belt replacement: Mitsubishi 3000GT, GTO V6 DOHC 3.0 (6G72)

🧭 Before you start

Fits: platform codes 3.0, V6, 24V

• Opens: brake fluid
• Timing position: the crankshaft or camshaft is set and locked during this job
• Special tools named: torque wrench, locking pin

Don't miss

• Always check the timing marks before timing belt removal
• The engine must be cold before timing belt adjustment
• Use a wrench to counterhold the camshafts
• Use a wrench to counterhold
• When tightening the pulley bolt, ensure the tensioner pulley does not rotate

🔧 Engine codes this applies to

📋 Procedure

Preparation and removal

1. Always check the timing marks before timing belt removal
2. Note: Avoid bending, torsion or traction
3. Disconnect the battery earth cable
4. Support the engine
5. Remove the crankshaft pulley

6. Remove the brake fluid level sensor
7. Left-hand bank
8. Remove the rear engine mount
9. Remove the ancillary drive belt idler pulley
10. Remove the engine support bracket
11. Align the crankshaft timing marks
12. Disconnect the camshaft position sensor electrical connector
13. Note: Use a wrench to counterhold the camshafts
14. Remove the timing belt lower cover
15. Note: Timing marks with the engine in the vehicle
16. Loosen the tensioner pulley bolt
17. Push the tensioner pulley against the timing belt
18. Remove the tensioner pulley
19. Check the timing marks
20. Note: Repeat the procedure if the marks are outside the specified area

Installation and checks

21. Fit the locked tensioner
22. Check the belt(s) for cracks, fraying, wear and oil contamination
23. Note: The engine must be cold before timing belt adjustment
24. Installation sequence:
25. Clamp the timing belt on the gearwheels while fitting the timing belt
26. Remove the clamp(s)
27. Turn the crankshaft 90° anti-clockwise and turn it back to TDC again to let the belt settle
28. Use a special tool:
29. Loosen the tensioner pulley
30. Use a special tool:
31. Note: Use a wrench to counterhold
32. Use a torque wrench to adjust the timing belt tension
33. Tighten the tensioner centre bolt
34. Note: When tightening the pulley bolt, ensure the tensioner pulley does not rotate
35. Unlock the tensioner
36. Turn the crankshaft clockwise 2 rotations
37. Check the tensioner
38. Check that the locking pin can be inserted and removed
39. Wait for 5 minutes
40. Measure the distance:
41. Check the timing marks again
42. Note: Repeat the procedure if the marks are outside the specified area
43. Further refitting is in the reverse order of removal
44. Note:
45. Tightening sequence:
46. Refit the engine support bracket
47. Lubricate the bolt during fitting

Other MITSUBISHI procedures

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