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Nissan VG30E and KA24E engine factory workshop and repair manual download

Tools required
- Floor jack (3-ton recommended) and two quality jack stands.
- Small transmission jack or second floor jack (to support transmission/engine).
- Wood block (1–2" thick) to protect oil pan/transmission case under jack.
- 3/8" and 1/2" drive ratchet and breaker bar.
- Socket set: 10, 12, 14, 17, 19 mm sockets (metric set; some hardware may vary).
- Deep sockets and swivel/extension set for hard-to-reach bolts.
- Torque wrench (0–150 ft·lb range).
- Pry bar.
- Penetrating oil (PB Blaster or similar).
- Wire brush and rag.
- Threadlocker (medium strength, blue) or anti-seize as recommended.
- Safety glasses, gloves, wheel chocks.
- (Optional) engine support bar or hoist if available.
- Replacement transmission mount (OEM or quality aftermarket for VG30E / KA24E). Replace any corroded bolts/nuts.

Safety precautions
- Work on a flat level surface. Chock rear wheels.
- Disconnect negative battery terminal if you’ll be working near electrical, moving engine/transmission, or removing ground straps.
- Use jack stands — never rely solely on a jack.
- Protect oil pan/transmission with a wood block under jack to avoid damage.
- Wear eye protection. Have a phone nearby in case of emergency.
- If bolts are seized and you need to heat them, do so cautiously and only where safe.

Parts required
- Correct transmission mount for your vehicle (match VIN/engine code: VG30E or KA24E).
- Possibly new mounting bolts/nuts if original fasteners are rusted, stretched, or torque-to-yield.
- Small amount of threadlocker (blue) or anti-seize for reassembly per parts manufacturer/service manual.

Overview of how tools are used
- Floor jack: lift transmission/engine slightly to take load off the mount before removing. Use wood block between jack and pan/case.
- Transmission jack or second jack: support the transmission or engine while mount removed. Use carefully to align new mount.
- Breaker bar/ratchet/sockets: remove and install mount bolts. Use breaker bar on seized bolts.
- Torque wrench: final torque of bolts to spec.
- Pry bar: tease crossmember/mount into alignment if bolt holes don’t line up.
- Penetrating oil: spray and let soak before attempting to remove old bolts.

Step-by-step procedure
1. Preparation
- Park, chock wheels, engage parking brake. Disconnect negative battery if preferred.
- Raise front of vehicle with floor jack and secure on jack stands at factory lift points. Ensure vehicle is stable.
- Locate the transmission mount: typically on the rear/lower transmission to crossmember area.

2. Access and inspection
- Remove any undertray or skid plates blocking access.
- Inspect mount, bolts, crossmember and nearby exhaust for interference.
- Spray all mount bolts and studs with penetrating oil. Let soak 10–15 minutes.

3. Support the powertrain
- Place a floor jack under the transmission pan or the transmission case area using a wood block to spread load and protect pan.
- Lift jack just enough to take some weight off the mount — do NOT lift the engine/transmission significantly higher than its normal position.
- If engine movement is expected, also use an engine support bar or second jack under the oil pan with wood block. Secure engine against tipping.

4. Loosen and remove mount fasteners
- Loosen (but do not fully remove) the crossmember-to-body bolts if they need to be shifted for clearance. On many Nissan applications the mount is bolted to a crossmember; you may remove the mount-to-crossmember bolts or detach the crossmember if necessary.
- Remove the mount-to-transmission bolts (usually 2 bolts) and mount-to-crossmember bolts/nuts.
- Keep hardware organized; replace if damaged or excessively corroded.

5. Remove old mount
- Once fasteners removed and transmission supported, remove the old mount. You may need to rotate or pry slightly to free it.
- Clean mating surfaces on crossmember and transmission with a wire brush and rag.

6. Install new mount
- Position new mount in place. Start bolts by hand to avoid cross-threading.
- Tighten mount-to-transmission bolts snugly by hand or small ratchet but do not final-torque yet.
- Reattach mount-to-crossmember bolts/nuts and snug them.

7. Set proper load, then torque
- Slowly lower the jack supporting the transmission so that the powertrain weight rests on the mount in its normal position. If you lifted the body earlier, ensure the vehicle weight is also supported appropriately — mounts should be torqued with drivetrain in normal unloaded/loaded position per factory practice.
- With mount carrying the normal load, torque all mount bolts to spec (see torque note below).
- If you loosened crossmember bolts, torque them to spec as well.

8. Final checks
- Double-check all hardware is torqued to spec and threadlocker applied where recommended.
- Remove jacks, reinstall any shielding or components removed.
- Lower vehicle to ground, torque wheel lug nuts if wheels were removed, reconnect battery.
- Start engine, check for abnormal vibrations, clunks, or movement during rev/shift. Test drive short distance and recheck bolts.

Typical torque guidance (confirm with service manual)
- Mount-to-transmission bolts: ~35–50 ft·lb (47–68 Nm).
- Mount-to-crossmember bolts (larger): ~50–80 ft·lb (68–108 Nm).
Note: Nissan model/year and mount design vary. Confirm exact specs in factory service manual. If no manual, use conservative mid-range values and re-check.

Common pitfalls and remedies
- Not supporting engine/transmission properly: can lead to dropped engine/trans or injury. Use two jacks or an engine support bar.
- Jack on oil pan without wood block: may dent or crack pan. Always use wood block.
- Seized bolts/stripped heads: apply penetrating oil and let soak; use breaker bar, impact wrench, or heat carefully. If head rounds, extract and replace bolt/stud.
- Torquing bolts with mount unloaded: causes preloaded rubber and increased vibration. Torque with drivetrain in normal position.
- Reusing stretched/stripped nuts/bolts: replace them. Mount bolts often corrode—replace if in doubt.
- Misalignment causing drivetrain vibration: ensure mount is seated fully and bolts tightened with drivetrain at normal ride height.
- Forgetting to check nearby components: inspect exhaust hangers, shifter linkage, driveshaft bolts for damage while in the area.

Disposal and final notes
- Dispose of old mount properly. Keep work area clean and recheck torque after 100–200 miles.
- If vibration persists after mount replacement, inspect other mounts (engine mounts, rear trans mount), driveshaft/axles, and transmission mounts for wear.

Done.
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