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Nissan Skyline R32 engine factory workshop and repair manual download

Tools & consumables (minimum)
- Metric socket set (6–24 mm), deep & shallow, 1/4", 3/8", 1/2" drives
- Torque wrench (3/8" and 1/2", 5–200 Nm range)
- Combination wrenches, including flare-nut wrenches (8–19 mm)
- Penetrating oil (PB Blaster / Kroil)
- Breaker bar, ratchets, extensions and universal joint
- Impact driver or impact wrench (use carefully)
- Pliers, snap-ring pliers, needle-nose
- Allen/hex keys & Torx set
- Screwdrivers, gasket scraper
- Shop vice with soft jaws or padded jaws, bench press (for CHRA work)
- Micrometer or calipers, dial indicator (to measure endplay)
- Feeler gauges
- Hammer, brass drift
- Oil catch pan, rags, parts trays, gloves, eye protection
- Jack stands / hydraulic jack, wheel chocks
- Fuel/ignition disable tool or relay removal method for cranking
- RTV gasket sealant (if required by factory), anti-seize compound
- New engine oil and oil filter, coolant for top-up
- Clean engine assembly lube or turbo pre-lube oil syringe

Replacement parts / consumables to have on hand
- Complete turbo cartridge/CHRA or full turbo assembly (recommended unless experienced in balancing)
- Turbo rebuild kit (journal bearings, thrust, seals, shafts) only if rebuilding CHRA
- New oil feed banjo bolt washers (crush washers)
- Oil feed banjo bolt (inspect/replace if damaged)
- Oil return gasket / copper crush gasket or banjo O-ring
- Coolant line O-rings/gaskets or new coolant pipes if seized
- Exhaust manifold-to-turbo gaskets, downpipe gaskets
- Turbo mounting nuts/studs (replace corroded/stretched studs)
- Intercooler / inlet pipe clamps
- New clamps and hoses if old ones are brittle
- New oil filter and fresh engine oil

Safety precautions (mandatory)
- Work on a cool engine. Hot turbo/exhaust = severe burns.
- Disconnect negative battery terminal before starting.
- Secure vehicle on level ground with jack stands; use wheel chocks.
- Wear eye protection and gloves. Avoid loose clothing.
- Drain a small amount of oil into pan when removing oil lines; contain spills.
- If heating seized bolts, use a heat gun carefully; avoid damaging nearby rubber/plastic.
- Always consult factory service manual (FSM) for your specific R32 engine (RB20DET / RB25DET / RB26DETT) for torque specs and procedures.

Overview of procedure
1) Diagnosis (confirm turbo issue)
2) Prep & access (remove components that block turbo)
3) Turbo removal (oil/coolant/exhaust lines, actuator, manifold nuts)
4) Bench disassembly and inspection (or replace CHRA)
5) Rebuild/replace CHRA or install new turbo
6) Reinstall and torque to spec
7) Prime oil, start, check for leaks, break-in

Step-by-step detailed procedure

1 — Diagnosis (quick checks)
- Visual: oil in intercooler piping, oil droplets at intake, blue/white smoke on spool = turbo seal failure. Loud shaft play or grinding = bearing failure.
- Check turbo shaft play: with intake housing removed, feel for radial movement (>0.3–0.5 mm is suspect) and axial endplay (>0.3–0.8 mm depending on design). Excessive play = rebuild or replace CHRA.
- Listen for rubs or foreign object damage on turbine/compressor wheels.

2 — Preparation
- Gather tools & replacement parts. Have fresh oil & filter ready.
- Allow engine to cool fully.
- Disconnect battery negative.
- Jack vehicle and secure on stands if downpipe removal required.
- Remove airbox, intake piping, intercooler piping between turbo and intercooler, MAF/TB connections as needed to clear compressor housings.

3 — Remove obstructing components
- Remove heat shields covering turbos and downpipes. Use penetrating oil on rusted bolts and let soak.
- Label and remove vacuum lines to wastegate actuators. Note actuator rods and linkage positions (take pictures).
- Drain overpressure of coolant if needed and clamp hoses if removing coolant lines. Place drain pan.

4 — Disconnect oil & coolant
- Place oil catch pan under vehicle. Unbolt oil return flange from block/adapter. Expect oil spill — remove gently to avoid contamination of threads.
- Disconnect oil feed banjo at turbo. Use flare-nut wrench to avoid rounding; loosen banjo bolt and remove crush washers. Replace washers on reassembly.
- For water-cooled turbos, disconnect coolant lines (banjo fittings or hoses). Cap lines to prevent contamination.

5 — Remove exhaust connections
- Unbolt downpipes from turbo housings (or remove downpipe nuts). Use penetrating oil; heat bolts if necessary. If studs are corroded, remove carefully with penetrating oil and twist rather than brute force.
- Remove turbine housing nuts from exhaust manifold studs (or remove manifold/turbo assembly as one unit if easier).
- On RB26DETT you’ll remove small heat shields and sometimes oxygen sensor from downpipe.

6 — Remove turbo from manifold/head
- Support turbo to prevent it dropping.
- Remove nuts/studs holding turbo to manifold. Carefully extract turbo. If it’s seized to studs, apply penetrating oil and gentle heat. Avoid snapping studs in head (common catastrophic pitfall).
- Inspect studs & threads; replace any damaged studs and helicoil or repair threads as required.

7 — Turbo bench disassembly (if rebuilding)
- Clean external grime with parts cleaner.
- Remove compressor housing bolts; remove compressor cover and wheel. Use soft-jawed vice or hold compressor backplate with proper tool; do NOT lever on blade edges.
- Remove turbine housing bolts (careful with studs).
- Remove center housing and rotor assembly (CHRA). For cartridge-style, slide out CHRA; for journal/thrust designs, disassemble carefully.
- Inspect compressor/turbine wheels for nicks, chips, missing blades.
- Measure radial (side-to-side) and axial (endplay) with dial indicator / feeler gauges. If beyond spec, replace CHRA or the whole turbo. Turbine wheel damage or heavy shaft scoring = replace CHRA.
- If rebuilding CHRA: press off wheels and replace bearings/seals in clean environment; balancing is required — unless you can send CHRA to a turbo rebuilder, replace entire CHRA.

Tool usage notes on bench:
- Vice: use soft jaws or wrap housings in aluminum to prevent damage. Tighten slowly; do not deform housings.
- Snap-ring pliers: remove internal snap rings on some CHRAs to access bearing.
- Press: use a hydraulic press to remove/install bearing races and wheels evenly. Apply heat to housings if needed to expand.
- Dial indicator: mount to measure axial endplay by pushing/pulling along shaft; measure radial runout by rotating shaft.

8 — Replace parts or install new turbo cartridge
- Best practice for reliability: install a new or remanufactured CHRA or full turbo assembly. Rebuilt CHRA must be balanced; do not operate unbalanced assembly.
- Replace all crush washers, gaskets, and old clamps. Replace turbo studs if corroded.

9 — Reinstallation
- Clean mating surfaces (manifold, housings) thoroughly; remove old gasket material with scraper but avoid damaging surfaces.
- Install turbo onto manifold; if studs were removed, use anti-seize on new studs threads only where recommended by FSM.
- Tighten manifold-to-turbo nuts in a star pattern or sequence; torque to FSM spec. If you do not have FSM, torque lightly then re-check after initial heat cycles.
- Reconnect oil return (clean metal surfaces; use correct gasket or crush washer). Tighten to spec.
- Reconnect oil feed banjo bolt with new crush washers on both sides of the banjo; tighten to spec with flare-nut wrench to avoid rounding. Do not overtighten.
- Reconnect coolant lines with new O-rings or gaskets.
- Reattach downpipes and tighten in sequence; use anti-seize sparingly on studs if recommended.
- Reconnect wastegate actuator rod and vacuum lines. Ensure free movement and no binding.
- Reinstall heat shields, intake/intercooler piping, sensors, airbox.
- Replace oil filter and add new engine oil (primer will consume a little).

Tool usage notes for reinstallation:
- Torque wrench: use for oil feed banjo, manifold nuts, downpipe nuts, turbo mounting nuts. Torque wrench must be calibrated and used at proper ranges. Use longer handles for accuracy on higher values.
- Flare-nut wrench: place on hex of banjo bolt to avoid rounding; use correct size.
- Thread chaser: clean threads before installing studs/nuts.

10 — Oil priming and initial start
- Pre-fill turbo oil gallery (prime CHRA) by pouring clean engine oil into oil feed hole until it overflows the return port.
- Disable fuel or ignition (remove fuel pump fuse or ignition relay) and crank engine for 10–15 seconds 2–3 times to build oil pressure and circulate oil to turbo. Wait 30s between cranks. This primes the turbo without combustion.
- Reinstall relay/fuse and start engine. Let idle and check for oil/coolant/exhaust leaks. Listen for unusual noises (whine/grinding).
- After engine warms, recheck torque on turbo mounting nuts and clamps (some expand/settle).

11 — Break-in / first 200 km
- Keep RPMs low for first 5–10 minutes, then drive gently for first 100–300 km. Avoid full-throttle, heavy boost, and long high RPM runs until oil has circulated and seals seated.
- After first heat cycle(s), re-check all fasteners, clamps, oil & coolant levels.

Common pitfalls & how to avoid them
- Snapped studs in head: prevent by using penetrating oil, heating stud base (not head) gently, turning slowly; if a stud breaks, extraction can be very expensive. Replace studs rather than risking reusing old ones.
- Not priming oil: leads to immediate bearing damage. Always pre-lube and crank with ignition/fuel disabled to build oil pressure.
- Reusing old crush washers and gaskets: causes leaks. Replace all.
- Reusing clogged oil feed or return pipes: leads to starvation. Inspect and clean; replace if corroded internally.
- Using incorrect torque values: may warp housings or cause leaks. Use FSM torque specs; if unknown, torque conservatively and recheck.
- Attempting to rebuild CHRA without balancing: causes vibration and rapid failure. Either use a rebuild kit and professional balancer, or buy reman/new CHRA.
- Allowing debris into turbo: block all openings during bench work and reassembly; keep everything absolutely clean.
- Mixing up vacuum/boost lines/wastegate rod adjustment: can lead to overboost and catastrophic engine damage. Mark and reattach lines correctly.
- Not changing oil & filter: contaminated oil will kill new turbo quickly. Always change oil & filter when swapping turbos.
- Over-tightening banjo bolts or damaging banjo fittings: use flare-nut wrench and proper torque to avoid stripping.

Useful measurements & checks to perform
- Compressor/turbine wheel radial runout and axial endplay (compare to FSM limits).
- Oil pressure at idle and at 2000 rpm after start; confirm normal values.
- Visual inspection of oil feed/return passages for sludge or pickup blockage.
- Wastegate actuator travel and rod free-play; rod should not bind.

Final notes (brief)
- For RB26DETT (R32 GT-R) the twin-turbo system is compact and heat & corrosion are common; plan time for stuck bolts. Always consult the R32 FSM for exact torque values and sequences — they supersede general guidance.
- If you lack CHRA balancing equipment or experience, replace CHRA with a factory reman or have a specialist rebuild/balance it.

End.
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