torque MAZDA MX-5 1994 Repair Manual

IGNITION SYSTEM G GND TEN I I I IGNITION TIMING 1. Check the condition of the engine (spark plugs, leaks in hoses, etc.). 2. Verify that all accessories are OFF. 3. Warm up the engine to the normal operating tempera- ture. Note When using an externally powered timing light and/or tachometer connect it to the power connector (Blue: l-pin). Warning Do not ground the power connector. terminal (Blue: l-pin); some fuses will be burned. 4. Connect a timing light and tachometer to the data link connector terminal (IG-). 5. Connect the SST and set TEST SW to "SELF TEST" or connect data link connector terminals TEN and GND with a jumper wire. 6. Check the idle speed, and set it to specification if neces- sary (Refer to section F.) ' Idle speed (rpm):800-900 (MT) 75-50 (AT) 7. Verify that the timing mark (white) on the crankshaft pulley is aligned with the indicator pin. Ignition timing: 9"-11" BTDC (at idle) 8. If the marks are not aligned, remove the ignition coil bracket and push the ignition coil aside for easy access and then loosen the crankshaft position sensor lock bolts, and turn the crankshaft position sensor to make the adjustment. 9. Tighten the crankshaft position sensor lock bolts to the specified torque. Tightening torque: 19-25 N-m (1 3-2.6 kgf~m, l4--19 ft.lbf) 10. After adjusting the ignition timing, disconnect the jumper wire or SST from the data link connector. 11. Increase the engine speed and verify that the ignition timing advances. Gartner Banana

G IGNITION SYSTEM BURNS PLUG GAP DAMAGE AND DETERIORATION DAMAGE SPARK PLUG Removal 1 Installation Caution Pulling on the wire part of the spark plug lead may i/ break it. To remove the lead, pull only on the boot. Caution To avoid breaking the spark plug be sure to fit the socket squarely over it. Tighten to the specified torque. Spark plug tightening torque: 15--22 N-m (1.5--2.3 kgf-m, 11-16 ft-lbf) Spark Test 1. Disconnect the high-tension lead from the spark plug. 2. Connect a new spark plug to the high-tension lead. 3. Hold with insulated pliers approx. 5-10mm (0.20-4.39 in) from a ground. 4. Crank the engine and verify that a strong blue spark is visible. . -.d' Note If a timing light is used to check for spark, some lights do not light at Nos.:! and 4 cylinders even if the igni- tion system is normal. Inspection Check the following and replace the spark plugs as neces- sary. 1. Damaged insulation. 2. Worn electrodes. 3. Carbon deposits. If cleaning is necessary, use a plug cleaner or a wire brush. Wipe upper insulator. 4. Damaged gasket. Plug gap: 1 .O-1 .l mm (0.040-0.043 in) Gartner Banana

IGNITION SYSTEM IGNITION COIL lnspection Secondary coil winding 1. Remove the high-tension leads. u 2. Measure resistance of the secondary coil winding of each coil with an ohmmeter. Secondary coil winding resistance (at 20°C (68°F)): 8.7-1 2.9 kR 3. If not within specification, replace the ignition coil. 45UOGX-030 I I Insulation resistance of case 1. Remove the high-tension leads and disconnect the con- nectors. 2. Use a 500V megger tester to measure the insulation resistance between the primary terminal and the coil case. Resistance : Above 10 MR 3. If not within specification, replace the ignition coil. L I 45UOGX-031 Replacement 1. Disconnect the high-tension leads and ignition coil con- nector. 2. Remove the installation bolts and the ignition coil. 3. Install in the reverse order of removal. L Tightening torque: 19-25 N.m (1.9--2.6 kgf-m, 14--18 ft-lbf) 45UOGX-032 IGNITER Inspection 1. Check the poor connection of ignition coil, high-tension leads and PCME. 2. Check the ignition coil, and high-tension leads. 3. Mesure the voltage of the PCME terminal as follows. (Refer to section F.) 1 G igniter (Nos.1, 4) 1 H igniter (Nos.2, 3) 2E, 2G crankshaft position sensor (SGT) 2F, 20 mass airflow sensor 4. If all are normal, but misfire still occurs, replace the igni- tion coil. Gartner Banana

G STARTING SYSTEM Check 1 Check 3 Check 2 STARTER Caution Obtain the code number and deactivate the audio anti-theft system before disconnecting the bat- tery. (Refer to section T.) Removal / Installation 1. Disconnect the negative battery cable. 2. Disconnect the wiring from the starter. 3. Remove the starter bracket. (MT only) 4. Raise the front of the vehicle and support it with safety stands. 5. Remove the bolts and the starter. 6. Install in the reverse order of removal. Tightening torque Nut O: 10-11 N.m (100-120 kgfam, 87-100 in4bf) Bolt, Nut O: 38-51 N.m (3.8-53 kgf-m, 28-38 ft4bf) Bolt 0: 16-22 N.m (1.6-2.3 kgf.m, 12-16 ft-lbf) Bolt 0: 38-51 N.m (3.8-5.3 kgf-m, 28-38 ft-lbf) Gartner Banana

H CLUTCH FLUID CLUTCH FLUID PREPARATION 49 0259 7708 For air bleeding Whench, flare nut REPLACEMENT Caution Clutch fluid will damage painted surfaces. If clutch fluid does get on a painted surface, wipe it off immediately. 1. Drain the fluid from the reservoir by using a suction pump. (Refer to section P.) 2. Remove the bleeder cap from the clutch release cylinder and attach a vinyl hose to the bleeder screw. 3. Insert the other end of the vinyl hose into a clear contain- er. 4. Loosen the bleeder screw by using the SST. 5. With another person slowly pumping the clutch pedal, drain the fluid from the clutch system. 6. Repeat step 5 until all the fluid is drained. 7. Modify the bleeder screw tightening torque to allow for ,-, a torque wrench-SST combination (Refer to section GI "Torque Formulas".) 8. Tighten the bleeder screw by using the SST. Tightening torque: 5.9--8.8 N.m (60-90 kgf.cm, 53-78 in4bf) 9. Fill the reservoir to MAX with new fluid of the specified type. 10. Bleed the air from the clutch. (Refer to page H-9.) 11. Check for correct clutch operation. 12. Verifv that there is no fluid leakaae. Gartner Banana

CLUTCHPEDAL H Minimum disengagement height: 68mm (2.68 in) (With carpet) CLUTCHPEDAL ADJUSTMENT Height lnspection 1. Measure the distance from the upper surface of the ped- al pad to the carpet. Pedal height: 175--185mm (6.89-7.28 in) (With carpet) 2. If necessary, adjust the height. Adjustment 1. Disconnect the clutch switch connector. 2. Loosen locknut @ and turn clutch switch @I until the height is correct. I 3. Tighten locknut @. Tightening torque: l3.Cl7.6 N-m (1 4Gl8O kgf-cm, 122-1 56 in-IM) 4. After adjustment, inspect the free play. Free Play lnspection 1. Depress the clutch pedal by hand until clutch resistance is felt. Free play: 0.6-3.lmm (0.02-0.12 in) Total free play: S13mm (0.20-0.51 in) 2. If necessary, adjust the free play. Adjustment 1. Loosen locknut 0 and turn push rod 03 until free play is correct. 2. Verify that the disengagement height as measured from the upper surface of the pedal pad to the carpet is correct when the pedal is fully depressed. 3. Tighten locknut 0. Tightening torque: 11 .&l6.6 N.m (120-1 70 kgtcm, 105--147 in.lbf} 4. After adjustment, inspect the height. Gartner Banana

H CLUTCH MASTER CYLINDER REMOVAL I INSTALLATION Caution Clutch fluid will damage painted surfaces. If clutch fluid does get on a painted surface, wipe -. - - - it off immediately. 1. Remove in the order shown in the figure, referring to Removal Note. 2. Install in the reverse order of removal, referring to Installation Note. 3. Refer to After-installation Procedure on page H-9. 1. Clutch pipe 3. Clutch master cylinder Removal Note .................. below Check for fluid leakaae from cvlinder bore 2. Nut " Installation Note ................ below Overhaul .................. page H-10 Air bleeding ............... page H- 9 4. Gasket Removal Note Clutch pipe Disconnect the clutch pipe by using the SST. Installation Note Clutch pipe 1. Modify the clutch pipe tightening torque to allow for use of a torque wrench-SST combination. (Refer to section GI "Torque Formulas".) 2. Tighten the clutch pipe by using the SST. Tightening torque: -1 12.8-21.5 N.m (1 30-220 kgf.cm, 11 %-I90 in.lbf) Gartner Banana

CLUTCH MASTER CYLINDER H After-installation Procedure 1. Bleed the clutch system. (Below) I 2. Add fluid to the reservoir MAX mark. ' 3. Inspect and adjust the clutch pedal height and free play. (Refer to page H-5.) AIR BLEEDING The clutch hydraulic system must be bled to remove air introduced whenever a hydraulic line is disconnected. Caution Clutch fluid will damage painted surfaces. If clutch fluid does get on a painted surface, wipe it off immediately. 1. Remove the bleeder cap from the clutch release cylinder and attach a vinyl hose to the bleeder plug. 2. Insert the other end of the vinyl hose into a fluid-filled clear container. 3. Working with another person, have the person depress the clutch pedal several times, then hold it down. 4. With the clutch pedal depressed, loosen the bleeder screw by using the SST to let fluid and air escape. Close the bleeder screw. 5. Repeat steps 3 and 4 until no air bubbles are seen in the fluid. Make sure the reservoir is always 314 full or more during this procedure. 6. Modify the bleeder screw tightening torque to allow for use of a torque wrench-SST combination. (Refer to sec- tion GI "Torque Formulas".) 7. Tighten the bleeder screw by using the SST. Tightening torque: 5.9-8.8 N.m (60-90 kgf.cm, 53-78 in4bf) 8. Fill the reservoir to MAX with new fluid of the specified type. 9. Check for correct clutch operation. 10. Verify that there is no fluid leakage. Gartner Banana

CLUTCH RELEASE CYLINDER H Installation Note Clutch pipe 1. Modify the clutch pipe tightening torque to allow for use of a torque wrench-SST combination. (Refer to section GI "Torque Formulas".) 2. Tighten the clutch pipe by using the SST. Tightening torque: 12.8-21.5 N-m (1 30-220 kgfam, 11%-190 in-lbf) Air Bleeding After installation, bleed the clutch system. (Refer to page H-9.) OVERHAUL 1. Disassemble in the order shown in the figure, referring to Disassembly Note. 2. lnspect all parts and repair or replace as necessary. Warning Using compressed air can cause dirt and other particles to fly out, causing injury to the eyes. Wear protective eye wear whenever using compressed air. 3. Wipe all parts, and clean all ports, passages, and inner parts with compressed air. 4. Assemble in the reverse order of disassembly. 1. Boot 5. Bleeder cap 2. Push rod 6. Bleeder screw 3. Piston and cup assembly 7. Steel ball Disassembly Note . . . . . . . . . . . . . . . below 8. Release cylinder body Inspect for wear, scoring, and cracks Inspect cylinder bore for scoring and corro- 4. Spring sion Disassembly Note Piston and cup assembly Warning Applying compressed air to the cylinder assem- bly can make the contents suddenly pop out, possibly causing injury. Hold a rag over the cylin- der opening when using compressed air. Remove the piston-and-cup assembly by applying com- pressed air through the clutch pipe installation hole. Gartner Banana

H CLUTCH UNIT Removal Note Clutch cover and disc 1 . Install the SST. 2. Hold the flywheel by using the SST or equivalent. e 3. Loosen each bolt one turn at a time in a crisscross pat- tern until spring tension is released. Then remove the clutch cover and disc. Flywheel 1. Hold the flywheel by using the SST or equivalent. 2. Remove the flywheel. 3. Inspect for oil leakage from the crankshaft rear oil seal. If there is any such leakage or if the oil seal is damaged, refer to section B and replace the crankshaft oil seal. Pilot bearing Note The pilot bearing does not need to be removed unless you are replacing it. Remove the pilot bearing by using the SST. L' Installation Note Flywheel 1. Wipe the bolts clean, and apply sealant to the bolt threads. 2. Install the flywheel, and secure it by using the SST or equivalent. 3. Tighten the bolts in the pattern shown. Tightening torque: 97-1 02 N.m (9.8-1 0.5 kgf.m, 71-75.9 ft-lbf) Pilot bearing Install a new pilot bearing flush with the flywheel by using a suitable pipe. Gartner Banana