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Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination)

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2000-2002 Buick Century, Regal 2000-2001 Chevrolet Lumina 2000-2002 Chevrolet Impala, Monte Carlo 2000-2002 Pontiac Grand Prix 2000-2002 Oldsmobile Intrigue 1. Verify that the coolant is at proper level in the radiator and the coolant recovery bottle. If the coolant is low, add proper amount of 50/50 water and DEX-COOL® mixture. If the low coolant light operates properly, diagnose the cooling system for loss of coolant as outlined in SI. DO NOT proceed further with this bulletin. 2. Remove the low coolant level sensor. Refer to Coolant Level Module Replacement in the Engine Cooling sub-section. 3. With the key on, the engine off and the coolant level sensor disconnected from the vehicle wiring harness, observe the low coolant light: Subject: Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination) Models: 2000-2002 Buick Century, Regal 2000-2001 Chevrolet Lumina 2000-2002 Chevrolet Impala, Monte Carlo 2000-2002 Pontiac Grand Prix 2000-2002 Oldsmobile Intrigue • Light is on — Chassis wiring or instrument cluster concern. Follow the appropriate diagnostic information in SI. • 4. With the key off, connect the coolant level sensor into the vehicle’s wiring harness. Connect a ground wire (1) to the battery negative terminal. Using a sharp probe (3) attached to the ground wire, ground the coolant sensor probe (2) as shown in the illustration. Make sure a good contact is made. With the key on and the engine off, observe the low coolant light for at least 15 seconds. 5. Using a small wire brush or emery cloth, polish the low coolant level sensor probe to remove any film or oxidation. The probe should be a bright brass color when finished. Use Brake Parts Cleaner to flush removed deposits from the low coolant sensor probe. Reinstall the low coolant sensor into the vehicle and proceed to Step 6. 6. Flush the cooling system and install new DEX-COOL® mixture as outlined in the SI. Check the vehicle’s warranty history to determine if any engine gasket had recently been changed. If there has not been a recent gasket replacement, locate and repair the source of the engine oil contamination

4L60-E Automatic Transmission/Torque Converter Clutch (TCC) Shudder, Water in Transmission (Repair Transmission and Replace Transmission Filler Tube, Level Indicator and Seal)4L60-E Automatic Transmission/Torque Converter Clutch (TCC) Shudder, Water in Transmission (Repair Transmission and Replace Transmission Filler Tube, Level Indicator and Seal) Transmission Repair

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Transmission Repair 1. Remove the transmission. Refer to the appropriate SI procedure. 2. Disassemble and inspect the transmission. Refer to Unit Repair Automatic Transmission – 4L60-E/4L65-E. Important: Subject: 4L60-E Automatic Transmission/Torque Converter Clutch (TCC) Shudder, Water in Transmission (Repair Transmission and Replace Transmission Filler Tube, Level Indicator and Seal) Models: 2004-2005 Buick Rainier 2003-2005 Chevrolet TrailBlazer Models 2003-2005 GMC Envoy Models 2003-2004 Oldsmobile Bravada 2005 Saab 9-7X with 4.2L In-Line 6 Cylinder Engine (VIN S — RPO LL8) • Visible rust on the transmission fluid level indicator. • Visible water in the oil pan. • A milky white substance inside the pan area. • Spacer plate gaskets that appear to be glued to the spacer plate, valve body or case. • Rust on internal transmission iron/steel components. • Remove the surge tank cap and examine the coolant for signs of contamination with transmission fluid (the coolant will have a milky, not clear appearance). • If the coolant has a normal, clear appearance, the radiator should not be replaced. • The cooler can also be tested by following the Coolant System Leak Test procedure (SI Document ID# 877442). Do NOT replace a radiator without verifying that the transmission oil cooler is leaking. If water or coolant is found in the transmission, the following components MUST be replaced. Replace the Transmission Fluid Filler Tube, Seal and Fluid Level Indicator WITH the transmission REMOVED from vehicle. 1. Remove the transmission fluid filler tube from the transmission. 2. Replace the transmission fill tube seal, P/N 1259475. 3. Replace the transmission fill tube, P/N 15000220, following the appropriate SI Document for Transmission Installation. 4. Replace the transmission fluid level indicator, P/N 15069769 when appropriate during the transmission installation. Replace the Transmission Fluid Filler Tube, Seal and Fluid Level Indicator with the transmission in the vehicle. 1. Remove the air cleaner outlet duct. Refer to Air Cleaner Element Replacement (SI Document ID# 1364496). 2. Remove the transmission fluid level indicator from the filler tube. 3. Remove the filler tube nut (2) located on the right side of the engine. 4. Remove the filler tube from the vehicle. Tip It is necessary to remove the two A/C line (suction line / low side of muffler hose) retainers and reposition • Replace all of the rubber type seals. • Replace all of the composition-faced clutch plate assemblies including the band. • Replace all of the nylon parts (Thrust Washers). • Replace the torque converter. • Thoroughly clean and rebuild the transmission, using new gaskets and oil filter. • Flush and flow check the transmission oil cooler using J 45096. Refer to Corporate Bulletin Number 02-07-30- 052C or newer – Automatic Transmission Oil Cooler Flush and Flow Test Essential Tool J 45096 TransFlow .
the A/C line to allow proper clearance for installation of the new transmission fluid fill tube. 5. Remove the A/C line at the oil level indicator tube bracket nut. 6. Remove the A/C bracket bolt from the engine lift hook. 7. Reposition the A/C line upward. 8. Install the new transmission filler tube, P/N 15000220, into position but NOT into the transmission at this time. 9. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information (SI Document ID# 744862). 10. Remove the two bolts securing the transmission heat shield to the transmission. 11. Remove the transmission heat shield from the transmission. 12. Remove the old filler tube seal from the transmission case. 13. Install a new seal, P/N 1259475 into the transmission case. 14. Position the new transmission filler tube into the transmission seal. 15. Install the transmission heat shield to the transmission. 16. Install the two bolts securing the transmission heat shield to the transmission. Tighten Tighten the bolts to 17 N·m (13 lb ft). 17. Lower the vehicle. 18. Install the nut securing the filler tube to the stud. Tighten Tighten the nut to 10 N·m (89 lb in). 19. Reposition the A/C line into place. 20. Install the A/C line bracket to the oil level indicator tube stud and secure the bracket with the nut. 21. Install the A/C line bracket to the engine lift bracket and secure the A/C bracket with the bolt

2002 Ford Explorer Sport/ Sport Trac Cylinder Head Removal and installation manual

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Removal Both cylinder heads 1. With the vehicle in NEUTRAL, position it on a hoist. For additional information , refer to Section 100-02 . 2. Relieve the fuel system pressure. For additional information, refer to Section 310-00 . 3. Drain the cooling system. For additional information, refer to Section 303-03 . 4. Remove the intake manifold. For additional information, refer to Intake Manifold in this section. 5. Remove the cooling fan shroud. For additional information, refer to Section 303-03 . 6. Remove the accessory drive belt. For additional information, refer to Section 303-05 7. Remove the LH valve cover. For additional information, refer to Valve Cover — LH in this section. 8. Remove the RH valve cover. For additional information, refer to Valve Cover — RH in this section. 9. Disconnect the generator electrical connections. 10. Remove the accessory drive belt tensioner. 11. Remove the bolts and the generator and generator mounting bracket as an assembly. 12. Disconnect the crankshaft position (CKP) sensor electrical connector. 13. Disconnect the wiring harness retainers. 14. Disconnect the water temperature indicator sender unit and the engine coolant temperature (ECT) sensor electrical connectors. 15. Disconnect the exhaust gas recirculation (EGR) tube fitting. 16. Remove the upper heater coolant hose. 1. Squeeze the heater hose clamp. 2. Remove the heater coolant hose. 17. Remove the lower heater coolant hose and position aside. 1. Remove the bolt. 2. Squeeze the hose clamp. 3. Remove the heater coolant hose and position aside. 18. NOTE: The coolant hose will be removed with the thermostat housing. Move the coolant bypass hose clamp off the water pump outlet. 19. Remove the bolts, the thermostat housing and the bypass hose. 20. Remove the bolt and detach the wiring harness retainer. 21. Remove the bolts and position the accessory drive bracket aside.22. Detach the wiring harness retainer. 23. Remove the bolt and the oil level indicator tube. 24. Using the special tool, disconnect the LH spark plug wires from the spark plugs. 25. Disconnect the fuel pulse damper vacuum connector. 26. Remove the four bolts and position the fuel supply tube aside. 27. Remove the bolts and the fuel rail and injectors as an assembly.28. NOTE: Mark each of the roller followers to make sure it is installed in its original position during reassembly. Use the special tool to remove the roller followers. 29. Remove the lower radiator hose. 30. Remove the nut and position the A/C tube bracket aside. 31. Using the special tool, set the No. 1 piston at top dead center (TDC). RH cylinder head 32. Remove the RH fenderwell splash shield. 33. Remove the RH camshaft chain tensioner.

1999 Saturn SL1 L4-1.9L SOHC VIN 8 Engine – Driveability Concerns/ Cooling System DTC’s Set

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1. Disconnect engine coolant temperature sensor electrical connector and inspect sensor and connector terminals for corrosion and/or evidence of engine coolant. ^If terminals are corroded or if there is evidence of engine coolant proceed to step 4. ^If terminals are not corroded and there is no evidence of engine coolant, reconnect the electrical connector and continue to next step. 2. Perform one or both of the following checks to determine whether the engine coolant temperature sensor is providing the correct temperature indication. If engine coolant temperature sensor reading does not pass either of the above tests, continue with next step. ^If engine is at ambient temperature (vehicle has been sitting overnight or not started for several hours), use a Scan tool to compare the inlet air temperature ( IAT ) to the engine coolant temperature ( ECT ). These two readings should be within 2°C (4°F) of each other. ^If engine is at operating temperature, install a thermometer in the coolant recovery reservoir. With the engine running and A/C off, use a Scan tool to compare the engine coolant temperature sensor reading to the thermometer reading. These two readings should be within 8°C (15°F) of each other If engine coolant temperature sensor reading passes both of the tests above, refer to appropriate symptom diagnostic chart in the Engine/Emissions Controls Section of applicable Engine Service Manual. 3. Turn ignition off. 4Remove coolant surge tank cap. 5. Drain at least 1.9 L (2 Qt.) of engine coolant from the cooling system by opening radiator drain valve or removing engine drain plug. Collect engine coolant in a container. 6. Disconnect engine coolant temperature sensor electrical connector. 7. Remove engine coolant temperature sensor from cylinder head. 8. Obtain replacement engine coolant temperature sensor (P/N 21025106). 9. Use appropriate tap to clean sensor mounting hole of any thread sealant residue. 10. Install engine coolant temperature sensor in cylinder head. Torque: Engine Coolant Temperature Sensor: 8 Nm (71 in-lbs) 11. Inspect harness connector terminals for corrosion and/or evidence of engine coolant. If harness connector terminals are corroded or there is evidence of engine coolant, the harness connector must be replaced with new connector (P/N 12117087-includes: connector, terminals, wires, and splice sleeves). 12. Connect engine coolant temperature sensor connector. 13. Transfer engine coolant drained in step 5 into coolant surge tank. If necessary fill coolant surge tank to the FULL COLD range with 50/50 solution of correct type of antifreeze and clean water. 14. Start engine and check for leaks. 15. Run engine until upper radiator hose is hot, then add additional coolant if needed to bring the level to the FULL COLD level (1991-early 1997) or within the Min./Max. cold range (late l997-2001). 16. Install coolant surge tank cap.

1999 Ford Escort/ Tracer Cylinder Head Removal And Installation Manual

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Removal 1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 . 2. WARNING: Fuel supply lines will remain pressurized for long periods of time after engine shut down. This pressure must be relieved before disconnecting any fuel lines or fuel system components. Relieve the fuel system pressure. For additional information, refer to Section 310-00 . 3. Remove the engine air cleaner outlet tube. For additional information, refer to Section 303-03 . 4. Remove the timing belt. For additional information, refer to Timing Drive Components—Timing Belt in this section. 5. Remove the vacuum hoses at the: * positive crankcase ventilation (PCV) valve (6A666). * throttle body (9E926). * intake manifold (9424). * fuel pressure sensor. 6. Disconnect the fuel charging wiring (9D930) electrical connectors at main engine connector. 7. Disconnect the crankshaft position (CKP) sensor electrical connector. 8. Disconnect the fuel line. For additional information, refer to Section 303-04 . 9. Remove the power steering pump (3A674) and bracket as an assembly. For additional information, refer to Section 211-02 . 10. Remove the generator (GEN). For additional information, refer to Section 414-02 . 11. Remove the oil level indicator tube (6754). For additional information, refer to Oil Level Indicator and Tube in this section. 12. Disconnect the heater hoses. For additional information, refer to Section 412-02 . 13. Lower the vehicle. 14. Disconnect the upper radiator hose (8260) from the thermostat housing water hose connection. For additional information, refer to Section 303-03 . 15. Remove the camshafts (6250). For additional information, refer to Camshaft in this section. 16. Remove the ignition coil (12029) and bracket. For additional information, refer to Section 303-07 . 17. Remove the water thermostat housing. For additional information, refer to Section 303-03 . 18. Disconnect the knock sensor electrical connector. 19. Remove the generator bracket-to-cylinder head bolt. 20. Remove the bolts and the cylinder head (6049). 21. Remove the cylinder head gasket and discard. Installation WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related components. Highly flammable mixtures are always present and may be ignited, resulting in possible personal injury. 1. CAUTION: Do not use abrasive grinding discs to remove gasket material; use only plastic manual scrapers. Do not scratch or gouge the aluminum sealing surfaces. Clean all gasket material from the mating surfaces on the cylinder head and cylinder block. Clean out the bolt holes in the cylinder block. Inspect the cylinder head for flatness. For additional information, refer to Section 303-00 . 2. Install a new head gasket on the cylinder block. 3. CAUTION: Do not attempt to install the cylinder head assembly without assistance. Installation of the cylinder head assembly requires two people or possible injury may occur. CAUTION: The bolts are torque-to-yield and must be replaced or engine damage may occur. Tighten the bolts in three stages in the sequence shown. * Stage 1: Tighten the bolts to 15-25 Nm (12-18 lb-ft). * Stage 2: Tighten the bolts to 35-45 Nm (26-33 lb-ft). * Stage 3: Tighten the bolts an additional 105 degrees. 4. Install the generator bracket-to-cylinder head bolt. * Tighten to 20 Nm (15 lb-ft). 5. Connect the knock sensor electrical connector. 6. Install the thermostat housing. For additional information, refer to Section 303-03 . 7. Install the ignition coil and bracket. For additional information, refer to Section 303-07 . 8. Install the camshafts. For additional information, refer to Camshaft in this section. 9. Connect the upper radiator hose. For additional information, refer to Section 303-03 . 10. Raise and support the vehicle. For additional information, refer to Section 100-02 . 11. Install the heater hoses. For additional information, refer to Section 412-02 . 12. Install the generator and bracket assembly. For additional information, refer to Section 414-02 . 13. Install the power steering pump and bracket assembly. For additional information, refer to Section 211-02 . 14. Connect the fuel lines. For additional information, refer to Section 310-00 . 15. Connect the crankshaft sensor electrical connector.