MG MGA Workshop Manuals and Repair Manuals

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MG MGA

The MGA is a sports car produced by MG division of the British Motor Corporation from 1955 to 1962. Announced on 26 September 1955, the car was officially launched at the Frankfurt Motor Show. A total of 101,081 units were sold through the end of production in July 1962, the vast majority of which were exported. Only 5869 cars were sold on the home market. The 1489 cc engine produced 68 hp (51 kW) at first, but was soon uprated to 72 hp (54 kW). An early open car tested by British magazine The Motor in 1955 had a top speed of 97.8 mph (157.4 km/h) and could accelerate from 0 60 mph (97 km/h) in 16.0 seconds.

MG MGA FAQ's

How do I adjust the clutch on a MG MGA?

To adjust the clutch on a MG MGA, locate the clutch lever on the side of the transmission and loosen the locknut. Turn the adjusting screw clockwise to increase clutch free play or counterclockwise to decrease it. The correct free play should be around 1/2 inch or as specified in the owner's manual. Once the adjustment is complete, tighten the locknut to secure the setting.

How do I adjust the headlights on a MG MGA?

To adjust the headlights on a MG MGA, park the vehicle on a level surface facing a wall at a distance of 25 feet. Using a screwdriver, locate the adjustment screws on the headlight assembly. Turn the vertical and horizontal adjustment screws to align the headlights' beams with the desired height and position, ensuring they are parallel and not too high or low. Once the adjustment is complete, test the headlights' alignment by observing their projection on the wall.

How do I check and top up the transmission fluid in a MG MGA?

To check and top up the transmission fluid in a MG MGA, park the vehicle on a level surface and ensure the engine is running. Locate the transmission dipstick, usually near the firewall, and remove it. Wipe it clean, reinsert it fully, and then remove it again to check the fluid level. Add the recommended transmission fluid, as specified in the owner's manual, through the dipstick tube if necessary. Ensure not to overfill, as it can cause damage to the transmission.

How do I replace a blown fuse in a MG MGA?

Locate the fuse box, usually found on the driver's side of the dashboard or in the engine compartment. Identify the fuse corresponding to the blown circuit by referring to the owner's manual or the fuse box cover. Use a fuse puller or a pair of needle-nose pliers to remove the blown fuse and replace it with a new one of the same rating. Ensure the new fuse is securely seated, and then test the circuit to verify proper functionality.

How do I replace a faulty battery in a MG MGA?

Start by disconnecting the negative terminal of the battery, followed by the positive terminal. Remove any battery hold-down brackets or clamps, allowing for the safe removal of the old battery. Clean the battery tray and terminal connectors with a mixture of baking soda and water to remove any corrosion. Install the new battery, connecting the positive terminal first and then the negative terminal, and secure it with the hold-down brackets or clamps. Finally, ensure the battery is properly seated and secure.

How do I replace a faulty spark plug in a MG MGA?

Start by removing the spark plug wire from the spark plug and using a spark plug socket and ratchet, loosen and remove the old spark plug. Check the new spark plug gap using a feeler gauge and adjust it if necessary. Install the new spark plug by hand, and then tighten it to the specified torque using the spark plug socket and ratchet. Finally, reattach the spark plug wire to the new spark plug.

How do I troubleshoot a malfunctioning electrical system in a MG MGA?

Start by checking the battery's charge and connections to ensure they are clean and secure. Then, inspect the fuses for any blown or faulty ones and replace as necessary. If the issue persists, use a multimeter to test the voltage at various electrical components and connections, identifying any potential voltage drops or shorts. Additionally, check the wiring harnesses for any visible damage or loose connections. If unable to diagnose the issue, it is advisable to consult a professional automotive electrician for further troubleshooting and repair.

How often should the engine oil be changed in a MG MGA?

The engine oil in a MG MGA should be changed approximately every 3,000 miles or every six months, whichever comes first. Regular oil changes are crucial for maintaining the engine's lubrication and preventing premature wear. Additionally, always use the recommended oil grade specified in the owner's manual for optimal engine performance and longevity.

What is the procedure for adjusting the valves in a MG MGA?

To adjust the valves in a MG MGA, start by removing the valve cover and rotating the engine to the appropriate valve adjustment position. Using a feeler gauge, check the valve clearance and adjust it to the specified measurement by loosening or tightening the locknut and adjusting screw. Repeat this process for each valve, ensuring proper clearance for both intake and exhaust valves. Once all adjustments are completed, reinstall the valve cover and ensure it is properly sealed.

What is the procedure for bleeding the brakes on a MG MGA?

To bleed the brakes on a MG MGA, start with the brake furthest from the master cylinder, typically the rear right. Connect a clear plastic tube to the bleeder valve and immerse the other end in a container partially filled with brake fluid. Open the bleeder valve while having an assistant depress the brake pedal slowly and then close the valve before releasing the pedal. Repeat this process for each wheel, working towards the closest wheel to the master cylinder, until all air bubbles are eliminated and the brake pedal feels firm.

What is the recommended interval for changing the brake fluid in a MG MGA?

The brake fluid in a MG MGA should be changed approximately every two years or 24,000 miles, whichever comes first. Over time, brake fluid absorbs moisture, which reduces its effectiveness and can lead to brake system corrosion. Regular brake fluid changes help maintain optimal braking performance and ensure the longevity of brake system components. Always use the recommended brake fluid type and follow the proper bleeding procedure when performing this maintenance task.

What is the recommended interval for replacing the timing belt in a MG MGA?

The timing belt in a MG MGA should be replaced approximately every 60,000 miles or as specified in the owner's manual. The timing belt is a crucial component that synchronizes the engine's valves and pistons, and a failure can cause severe engine damage. Regular timing belt replacements help maintain engine reliability and prevent costly repairs. When replacing the timing belt, it is advisable to also replace the tensioner and other associated components for optimal performance.

What is the recommended tire pressure for a MG MGA?

The recommended tire pressure for a MG MGA is 26 psi for the front tires and 28 psi for the rear tires. Proper tire pressure ensures optimal handling, fuel efficiency, and tire longevity. It is important to regularly check and adjust the tire pressure as necessary to maintain the vehicle's performance and safety.

What type of coolant should be used in a MG MGA?

A MG MGA should use a high-quality ethylene glycol-based coolant mixed with distilled water in a 50:50 ratio. This coolant mixture provides the necessary protection against freezing and overheating while also preventing corrosion and scale buildup within the cooling system. It is crucial to use the appropriate coolant type and maintain the proper mixture for optimal engine performance and longevity.