300zx Timing Belt

8/8/2019 300zx Timing Belt

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1995 Nissan-Datsun 300ZX Coupe V6-2960cc DOHC Turbo (VG30DETT)

Vehicle Level Engine, Cooling and Exhaust Engine Timing Belt Service and Repair

Service and RepairNotes

Timing Belt Replacement

REMOVAL

Fig. 10

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Page 1 of 13ALLDATA Online - 1995 Nissan-Datsun 300ZX Coupe V6-2960cc DOHC Turbo (VG30...

3/5/2010http://www.alldatapro.com/alldata/PRO~V155765298~C21767~R0~OD~N/0/41746505/56 ...


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1. Remove engine undercover.2. Drain engine coolant from both cylinder block drain plugs and radiator drain cock.

3. Remove radiator.4. Remove drive belts, cooling fan and coupling.

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5. Remove crankshaft pulley bolt. At this time remove starter motor and set a suitabletool to ring gear so that crankshaft cannot rotate.

6. Remove crankshaft pulley using Tool.7. Remove water inlet and outlet.

8. Remove front timing belt covers.

Note: Be cafreful not to damage the ring gear teeth on flywheel or drive plate

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9. Install a suitable stopper bolt into tensioner arm of auto-tensioner so that auto-tensioner pusher does not spread out.

10. Set No.1 cylinder at T.D.C. on its compression stroke.

11. Remove auto-tensioner and timing belt.

Inspection

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Caution: a. Do not bend timing beltb. After removing timing belt, do not turn crankshaft and camshaft separatelybecause valves will strike piston heads.c. Make sure that timing belt, camshaft sprocketm crankshaft sprocket, idlerpully and auto-tensioner are clean and free of oil and water.




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Visually check the condition at timing belt. Replace if any abnormality is found.

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Inspect auto-tensioner for oil leaks from pusher rod and diaphragm.

Installation

1. Confirm that No.1 cylinder is set at TDC on its compression stroke.

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2. Align matching marks on camshaft and crankshaft sprockets with aligning marks onrear belt cover and oil pump housing.

3. Remove all spark plugs.

4. Set timing belt.

a. Ensure timing belt and sprockets are clean and free from oil or water. Do notbend or twist timing belt.b. Align white lines on timing belt with matching mark on camshaft sprocket and

crankshaft sprocket.c. Point arrow on timing belt towards the front.

5. Adjust tensioner arm to give 4 mm (0.16 in) clearance with pusher of auto-tensioner

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using a suitable vise. and then insert stopper bolt into tensioner arm in order thatclearance does not change.

6. Install auto-tensioner and tighten nut (1 ) and bolts (2 ) & (3 ) slightly by hand.

7. Push auto-tensioner slightly towards timing belt to prevent belt from slipping. Settensioner slightly by pushing timing belt. Then, turn crankshaft 10 degreesclockwise and tighten nut 1 and bolts 2 & 3 to 16 - 21 Nm (12 - 15 ft lb) .

NOTE: When adjusting clearance, do not push tensioner arm with stopper bolt fittedbecause it will damage thread portion of stopper bolt.

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NOTE: At this time, do not push auto-tensioner hard or belt will be adjusted too tightly.




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8. Turn crankshaft 120counterclockwise.9. Loosen nut 1 and bolts 2 & 3 1/2 turn to set tensioner body as far back as it will go.

10. Turn crankshaft clockwise and set No. 1 cylinder at TDC on its compression stroke.

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11. Push the end of pusher with approx. 67.7 -81.4 N (6.9 - 8.3 kg, 15.2 - 18.3 lb) forceusing Tool (push-pull gauge) and tighten nut (1 ) and bolts (2 ) & (3 ) to 16 - 21 N.m(1.6 - 2.1 kg-m. 12 - 15 ft.lb.).

12. Turn crankshaft 120clockwise.

13. Turn crankshaft 120counterclockwise and set No. 1 cylinder at T.D.C. on itscompression stroke.

NOTE: If deflection of timing belt exceeds specification in procedure 15., changeapplied pushing force.

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Page 10 of 13ALLDATA Online - 1995 Nissan-Datsun 300ZX Coupe V6-2960cc DOHC Turbo (VG...



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14. Prepare a suitable steel plate to measure belt deflection as shown.

15. Set plate and push it with 49 N (5 kg, 11 lb) force using Tool (push-pull gauge) at

each position of timing belt mid-way between pulleys as shown.16. Measure each deflection. If not within specification, repeat procedure from step 7through step 15. Deflection: 6 - 7 mm (0.24 - 0.28 in) or the average of eachportion (a)+(B)+(C)+(D) / 4 = 6 - 7 mm (0.24 - 0.28 in)

17. Confirm auto tensioner fixing nuts and bolts are tightened to 16 to 21 Nm (1.6 - 2.1kg-m, 12 - 15 ft lb) .

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18. Remove the auto-tensioner stopper bolt. After 5 minutes check the projection of therod (clearance between tensioner arm and pusher) stays at 3.5 - 5.2 mm (0.138 -0.205 in) .

19. Check the proper installation (no slip or misplacement) of timing belt at each positionas shown.

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300zx Timing Belt