1. Introduzione
This manual provides comprehensive repair and maintenance information for Datsun 240Z (1970-1973), 260Z (1974-1975), and 280Z (1976-1978) models. It covers routine maintenance, tune-up procedures, engine repair, cooling and heating, air conditioning, fuel and exhaust, emissions control, ignition, brakes, suspension and steering, electrical systems, and wiring diagrams. The content is designed to assist both experienced mechanics and vehicle owners in performing various tasks to ensure the proper operation and longevity of their vehicles.
Figure 1.1: Cover of the Haynes Repair Manual for Datsun Z-series vehicles.
2. Routine Maintenance and Tune-Up Procedures
Regular maintenance is crucial for the reliability and performance of your Datsun Z-series vehicle. This section outlines essential checks and procedures.
2.1 Drivebelt Check and Replacement (Every 30,000 miles or 24 months)
The serpentine drivebelt(s) are located at the front of the engine and are vital for the operation of engine components. Depending on the year and engine, various configurations exist, from single to multiple belts. Due to their function, belts are subject to wear and should be inspected periodically. The serpentine drivebelt drives components such as the alternator, power steering pump, water pump, air conditioning compressor, and supercharger on later V6 models. While inspection should be frequent, replacement may not be necessary for over 100,000 miles.
Controllo
Refer to illustrations 2.1 and 2.2 for visual guidance.
- The tension of the belt is automatically adjusted by the belt tensioner and requires no manual adjustments. Drivebelt wear can be assessed by inspecting the wear indicator marks on the front of the belt tensioner body. If the indicator mark is outside the operating range, the belt should be replaced. On V6 models, removing the engine cover and air cleaner inlet/outlet duct may be necessary to access the drivebelt(s).
- To thoroughly check the drivebelt(s) for cracks and separations, use a mirror. It may be necessary to turn the engine (using a wrench or socket and bar on the crankshaft pulley bolt, rotating clockwise only) to inspect the entire length of the belt. Ensure both sides of the belt are viewed. Also check for fraying and glazing, which indicates a shiny appearance. Inspect the pulleys for nicks, cracks, distortion, and corrosion.
- Note that minor cracks in the edges of a ribbed belt are common and do not necessarily require replacement unless they are long or very deep.
Replacement (V6 Engines)
Refer to illustration 2.3 for visual guidance.
- Before removing the drivebelts, observe and note how the belt is routed on all pulleys.
- For models with a single drivebelt, insert a 1/2-inch drive ratchet or breaker bar into the tensioner hole and rotate the handle clockwise to release the drivebelt tension. Once tension is released, remove the belt from the pulleys. Access may be easier from under the vehicle.
- Install the new drivebelt onto the crankshaft, alternator, power steering pump, and air conditioning compressor. Ensure the drivebelt is correctly seated in all pulley grooves, then release the tensioner.
- For models with multiple drivebelts, begin with the outer (water pump/alternator) drivebelt. Insert a 1/2-inch drive ratchet or breaker bar into the square hole and rotate the handle clockwise to release the drivebelt tension. Remove the belt.
- With the outer drivebelt removed, insert a 1/2-inch drive ratchet or breaker bar into the inner (power steering/air conditioning compressor) belt tensioner square hole and rotate the handle clockwise to release the drivebelt tension. Remove the belt.
- Starting with the inside belt, install the new drivebelt onto the crankshaft, power steering pump, and air conditioning compressor. Ensure the drivebelt is correctly seated in all pulley grooves, then release the tensioner. Repeat the procedure for the outer drivebelt.
Figure 2.1: Drivebelt inspection and replacement procedures, including acceptable and unacceptable wear patterns.
Figure 2.2: Drivebelt tensioner details and initial steps for automatic transmission fluid and filter change.
2.2 Brake Fluid Check and Replacement
Proper brake fluid levels and quality are essential for safe vehicle operation.
- When pouring brake fluid, place plenty of rags around the master cylinder to protect painted surfaces from drips or splashes.
- Before starting, acquire the specified brake fluid (refer to Recommended Lubricants and Fluids in the Chapter's Specifications).
- Remove the cap from the master cylinder reservoir.
- Use a hand suction pump or similar device to withdraw fluid from the master cylinder reservoir.
- Add new fluid to the master cylinder until it reaches the base of the filler neck.
- Bleed the brake system as described in Chapter 9. Bleed all four brakes until new, uncontaminated fluid is expelled from the bleed screw. Maintain the fluid level in the master cylinder to prevent air from entering the system.
- Refill the master cylinder with fluid and verify brake operation. The pedal should feel firm, without sponginess. Warning: Do not operate the vehicle if there is any doubt about the effectiveness of the brake system.
3. Engine Repair
This section covers various engine repair procedures, including component removal, inspection, and installation. Detailed instructions for specific engine types (e.g., L24, L26, L28) are provided within the manual.
- Engine disassembly and assembly
- Cylinder head service
- Piston and connecting rod service
- Crankshaft and main bearings
- Timing chain/belt replacement
4. Cooling and Heating Systems
Information on maintaining and repairing the cooling and heating systems to prevent overheating and ensure proper cabin climate control.
- Radiator and cooling fan service
- Sostituzione termostato
- Water pump replacement
- Heater core service
5. Air Conditioning System
Guidance on the air conditioning system, including component checks and maintenance.
- Assistenza compressori
- Condenser and evaporator inspection
- Refrigerant system checks (professional service recommended for refrigerant handling)
6. Fuel and Exhaust Systems
Details on the fuel delivery and exhaust gas management systems.
- Fuel pump and filter replacement
- Carburetor/fuel injection system service
- Exhaust manifold and system repair
7. Emissions Control System
Information on components designed to reduce vehicle emissions.
- PCV valve service
- EGR system checks
- Catalytic converter information
8. Sistema di accensione
Maintenance and repair of the ignition system components.
- Ispezione e sostituzione delle candele
- Distributor service
- Ignition coil checks
9. Freni
Detailed procedures for brake system maintenance and repair.
- Brake pad and shoe replacement
- Brake rotor and drum service
- Master cylinder and caliper/wheel cylinder overhaul
- Brake bleeding procedures
10. Suspension and Steering
Instructions for maintaining and repairing the vehicle's suspension and steering components.
- Shock absorber/strut replacement
- Ball joint and control arm service
- Steering gear and linkage repair
- Wheel alignment considerations
11. Electrical Systems and Wiring Diagrams
Guidance on the vehicle's electrical components and detailed wiring diagrams for troubleshooting.
- Battery and charging system checks
- Starter motor service
- Lighting and accessory circuit repair
- Interpreting wiring diagrams
12. Automatic Transmission Fluid and Filter Change (Every 60,000 miles or 48 months)
Regular fluid and filter changes are essential for automatic transmission longevity.
Refer to illustrations 2.2 for visual guidance.
- Before starting, acquire the specified transmission fluid (refer to Recommended Lubricants and Fluids in this Chapter's Specifications) and a new filter.
- Gather necessary tools: a floor jack, jackstands to support the vehicle, a drain pan (at least 5 quarts capacity), newspapers, and clean rags.
- Raise the vehicle and support it securely on jackstands. The vehicle must be level.
- Position the drain pan underneath the transmission pan. Remove the front and side pan mounting bolts, but only loosen the rear pan bolts approximately three turns. Note: Some early models have a drain plug in the transmission pan. If equipped, drain fluid from the plug before loosening any pan bolts.
- Carefully pry the transmission pan loose with a screwdriver, allowing fluid to drain.
13. Specifiche
This manual includes detailed technical specifications for various components and systems, such as torque values, fluid capacities, and component dimensions. Always refer to the specific chapter for the most accurate and up-to-date specifications relevant to your vehicle's year and model.
- Editore: Haynes Manuals N. America, Inc.
- Data di pubblicazione: 15 gennaio 1999
- Edizione: 1°
- Lingua: Inglese
- Lunghezza di stampa: 229 pagine
- ISBN-10: 0856962066
- ISBN-13: 978-0856962066
- Peso dell'articolo: 13.6 once
- Dimensioni: 8.25 x 0.63 x 10.63 pollici
14. Risoluzione Dei Problemi
A dedicated troubleshooting section is included to help identify specific problems. This section provides diagnostic charts and common symptoms to assist in pinpointing issues before undertaking repairs.
- Problemi di avviamento del motore
- Malfunzionamenti del sistema frenante
- Electrical system faults
- Cooling system issues
15. Supporto e risorse
Haynes manuals are known for their clear, step-by-step instructions, accompanied by hundreds of photographs and illustrations. Each manual includes tips for making jobs easier and eliminating the need for special tools, as well as notes, cautions, and warnings for the home mechanic. A color spark plug diagnosis guide and an easy-to-use index are also provided.
For additional support or inquiries regarding Haynes manuals, please refer to the publisher's official resources or contact their customer service.