Nissan Sunny disassembly: from engine to interior - a complete guide with photos and expert advice

The material is based on the experience of service station technicians and owners who have been operating and repairing for years Sunny. You will find here not only theory, but also practical advice - from how reset ECU errors after disassembly, to the nuances of working with electrical wiring. Let's start with preparation!

Preparing for analysis: tools, conditions and safety measures

Before you begin disassembling, make sure you have everything you need. Lack of tools or improper workspace organization can result in damage to parts or injury.. Here is the minimum set that you cannot do without:

• 🔧 A set of sockets and keys (necessarily with dimensions 10 mm, 12 mm, 14 mm, 17 mm - they are used most often).
• 🔨 Screwdrivers: Phillips (PH2, PH3) and flat (for removing plastic panels).
• 🔩 Torque wrench (critical for tightening engine and suspension bolts).
• 🧲 Magnetic holder for bolts (so as not to lose small things in the engine compartment).
• 📸 Camera or smartphone (to record the location of wires and fasteners).
• 🧤 Rubber coated gloves (protection from oil and sharp edges).

Also prepare your workspace: ideally, if it is a garage with a pit or a lift. If you are dismantling your car on the street, use wheel chocks and safety stands. Don't forget about safety:

⚠️ Attention: When working on the fuel system (for example, removing a gas tank), be sure to disconnect the negative terminal of the battery and relieve pressure in the system! On models with injector pressure in the ramp can reach 3–4 bar - it's dangerous.

If you plan to disassemble the engine, purchase in advance sealant for gaskets (For example, Loctite 574) and solvent for removing old sealant. On Sunny B14/B15 Valve cover and pan gaskets often stick - without special means, removing them can result in damage to aluminum surfaces.

Removing body panels: doors, hood, bumpers

It is more logical to start disassembling with external elements. This will free up access to the interior and engine compartment. On Nissan Sunny body panels are attached with bolts and clips, but there are some nuances:

• 🚪 Doors: First, remove the trim (it is held on by 4-5 clips and 2 bolts under the handle). Then disconnect the lock and window lifter rods. On models with electrical package Don't forget to disconnect the wiring connector!
• 🚗 Hood: Mounted with 4 bolts (10 mm) and two spring clamps. When removing, hold the hood - it is heavier than it looks!
• 💥 Bumpers: On B14 the front bumper is held on by 6 bolts and 4 clips, on B15 — 2 additional fastenings to the subframe are added. The rear bumper is easier to remove, but be careful with the headlights - their glass is fragile.

Pay special attention gaskets and seals. For example, a door seal on Sunny often breaks when removed carelessly. If you plan to paint body parts, immediately mask the joints with masking tape - this way you will avoid paint smudges.

If you are disassembling your machine for painting, remember: Sunny often rust sills and wheel arches. Before assembly, treat these areas with an anti-corrosive agent (for example, Dinitrol 4941).

Interior disassembly: dashboard, seats, electrical wiring

Salon Nissan Sunny It is relatively easy to disassemble, but this is where most of the pitfalls lie. Let's start with dashboard (torpedo):

1. Remove the steering wheel (unscrew the nut 19 mm and use a puller).
2. Disconnect the airbag connectors (if equipped) - be sure to relieve the voltage from the capacitor (wait 10-15 minutes after disconnecting the battery).
3. Remove the plastic covers around the radio and climate control (they are held on by clips).
4. Unscrew the 4 bolts securing the dashboard to the body (12 mm) and carefully slide the panel towards you.

The main difficulty is wiring. On Sunny B15 harnesses often fray at bending points (for example, under the steering column). Check them for integrity, especially if the machine was operated in high humidity conditions.

The seats are easy to remove: unscrew the 4 mounting bolts (14 mm) and disconnect the heating connectors (if equipped). But be careful with rails - on models after 1997 they often turn sour. Process them WD-40 in advance.

⚠️ Attention: When disassembling the interior Sunny with air conditioning do not forget to pump out the freon before removing the dashboard! Otherwise, when dismantling the heater core, you will release coolant into the cabin, which is hazardous to health.

Removing the engine and gearbox: step-by-step instructions

Removing the engine is the most critical step. On Nissan Sunny with engines GA14DE/GA15DE/GA16DE the algorithm is approximately the same, but there are differences in fastenings. You will need:

• 🚗 Lift or hoist (motor weighs ~100–120 kg).
• 🔧 Set of sockets with extensions (for access to subframe bolts).
• 🛢️ Container for draining oil and antifreeze.
• 🔌 Marker for marking connectors (so as not to get confused during assembly).

Sequence of actions:

1. Drain all technical fluids (oil, antifreeze, brake fluid).
2. Disconnect the battery by first removing the negative terminal.
3. Remove the radiator and fans (they are secured with 4 bolts 10 mm).
4. Remove the starter and generator (2-3 bolts each).
5. Unscrew the engine mounts to the box (14 mm) and subframe (17 mm).
6. Hang the motor on the hoist and carefully pull it up.

On models with automatic transmission (For example, RE4F03A) Before removing the engine, the torque converter must be disconnected. To do this, you will need a special torque converter bolt wrench (10 mm with internal hexagon).

Drain the oil and antifreeze|Mark the position of the timing pulleys with a marker|Disconnect the fuel lines|Remove the cooling system pipes|Check the hoist fastening-->

If the engine is disassembled for overhaul, pay attention to condition of piston rings and liners. On GA16DE connecting rod bearings often wear out - their thickness can be measured with a micrometer (nominal value - 1.495–1.500 mm).

Suspension disassembly: struts, arms, hubs

Suspension Nissan Sunny - classical McPherson front and multi-lever behind. Disassembling the front suspension is usually not difficult, but there are points that are often missed:

• 🔧 Racks: When removing, do not forget to compress the springs with zip ties! On Sunny B15 the springs have high stiffness, and without ties they can “shoot”.
• 🛑 Levers: The bolts securing the arms to the subframe often stick. Use penetrating lubricant and an impact wrench.
• 🔄 Hubs: When replacing hub bearings, heat it with a gas burner - this will make the bearing fit more tightly.
• 🔩 Stabilizer: Stabilizer bushings on Sunny wear out every 30–40 thousand km. When disassembling, check them for play.

The rear suspension is more complicated: it is important not to confuse the levers during reassembly. On B14/B15 the levers have different lengths, and their incorrect installation will lead to wheel alignment problems.

When disassembling the hubs, pay attention to brake discs. If their thickness is less 18 mm (denomination - 20 mm), needs to be replaced. On Sunny with ABS Speed sensors often get dirty - clean them before reassembling.

Common mistakes during disassembly and how to avoid them

Even experienced craftsmen sometimes make mistakes, which then result in expensive repairs. Here are the most common mistakes during disassembly Nissan Sunny:

1. Unmarked connectors and bolts. For example, the exhaust manifold mounting bolts have different lengths. If they are mixed up, the collector will leak.
2. Ignoring the tightening torque. Cylinder head bolts on GA16DE tightened in 3 stages with a torque 60–70 Nm. Failure to comply will lead to gasket burnout.
3. Damage to wiring. On Sunny B15 The wiring harness to the crankshaft position sensor often rubs against the bracket. Check its integrity!
4. Untimely replacement of oil seals. For example, the camshaft oil seal on GA14DE starts leaking after 100 thousand km. If it is not replaced during disassembly, oil will get into the timing belt.

Another common mistake is incorrect assembly of the cooling system. On Sunny The radiator hoses have different diameters, and if they are mixed up, the engine will overheat. Always check the diagram!

If you take it apart Sunny with automatic transmission, never drop the torque converter as this may damage the vanes. Also, do not forget to check the oil level in the automatic transmission after assembly (the norm is HOT on the dipstick at temperature 60–70°C).

Assembly after disassembly: nuances and final checks

Assembly is no less important process than disassembly. Here are the key points to pay attention to:

• 🔧 Mounting bolts: Treat all threaded connections (especially in the suspension and engine) graphite lubricant before tightening.
• 🔌 Electrical: Check all connectors for oxidation. On Sunny The contacts of the oxygen sensor and ignition coil often oxidize.
• 🛢️ Liquids: After assembly, fill in new oil, antifreeze and brake fluid. Do not mix different types of oils!
• 🔊 Noise insulation: When installing the doors and hood, check the integrity of the seals. On B15 The clips that secure the hood seal are often lost.

After assembly, be sure to perform the following checks:

1. Start the engine and check the oil pressure (normal is 2–4 bar at idle speed).
2. Make sure there are no fuel, oil or antifreeze leaks.
3. Check the operation of all electrical systems (headlights, power windows, climate control).
4. Take it for a test drive, paying attention to any unusual noises or vibrations.

If it lights up after assembly Check Engine, clear errors using a scanner (for example, ELM327). On Sunny False errors often occur on the oxygen sensor (P0130) after disconnecting the battery.

Frequently asked questions (FAQ)