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04 sienna coolant leak under intake

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2004 Chevrolet Chevy Suburban Information on Gradual Coolant Loss Over Time with No Evidence of Leak Found

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Some vehicles may experience a gradual coolant loss over time. A very low percentage of cylinder head(s) manufactured with an embossed Castech logo may develop a porosity crack in a very specific area. Inspect the cylinder head assembly to determine if the casting was manufactured by Castech. This can be accomplished by inspecting for their casting logo located on top of the intake port, under the rocker arm support rail and in the spring deck cavity portion of the cylinder head. Important: If the cylinder head(s) are Not a Castech casting, follow normal diagnostic procedures in SI to determine the cause of the coolant loss. Refer to the following illustrations on how to identify Castech casting and/or the very specific areas of the cylinder head(s) for a coolant leak from porosity. If the cylinder head(s) is a Castech casting (1), inspect the area around the five oil drain holes for witness marks indicating coolant seepage over time (2). Important: If No evidence of coolant loss is found on inspection of Castech casting cylinder head (s), follow normal diagnostic procedures in SI to determine the cause of the coolant loss

2002 Chevrolet Impala Intake Manifold Replacement (Lower) Removal And Installation Manual

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Intake Manifold Replacement (Lower) Notes Intake Manifold Replacement – Lower Removal Procedure 1. Disconnect the negative bakery. 2. Remove the upper intake manifold. 3. Remove the left valve rocker arm cover. 4. Remove the right valve rocker arm cover. 5. Disconnect the Engine Coolant Temperature ( ECT ) sensor electrical connector. 6. Disconnect and remove the fuel injector and the Manifold Absolute Pressure (MAP) sensor wiring harnesses. 7. Remove the fuel pipe clip bolt. 8. Remove the fuel pipe clip. 9. Remove the fuel feed pipe from the fuel injector rail. 10. Remove the fuel return pipe from the fuel injector rail. 11. Remove the fuel injector rail. 12. Remove the power steering pump from the front engine cover and reposition. 13. Remove the heater inlet pipe with heater hose from the lower intake manifold and reposition. 14. Remove the radiator inlet hose from the engine. 16. Remove the lower intake manifold bolts. 17. Remove the lower intake manifold. 18. Remove the valve rocker arms and pushrods. 19. Remove the lower intake manifold gaskets and seals. 20. Clean the lower intake manifold gasket mating surfaces. 21. Remove and clean all the RTV sealant from the lower intake manifold and the engine block (1).

2008-2010 FORD F-Super Duty DIESEL ENGINES REPEAT RADIATOR LEAK BUILT ON OR BEFORE SERVICE PROCEDURE

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DIESEL ENGINES REPEAT RADIATOR LEAK BUILT ON OR BEFORE ISSUE ECT temp. Some 2008-2010 F-Super Duty vehicles built on or b. Test results/next steps: before 9/14/2009 and equipped with a 6.4L diesel engine may exhibit repeat radiator leaks due to (1) If EOT is less than 8 °F (4.4 °C) malfunctioning (hyper-extended) high temperature higher than ECT, and the coolant temp thermostats. fluctuates roughly 5 °F (2.7 °C) – the thermostats are okay and do not need ACTION to be replaced. Replace just the Follow the Service Procedure steps to correct the radiator. Refer to WSM, Section 303-03 condition. (Engine Cooling). SERVICE PROCEDURE (2) If EOT exceeds ECT by greater than 8 °F (4.4 °C) or if the ECT readings 1. Verify the coolant leak is from the radiator, refer fluctuate 10 to 12 °F (5.55-6.66 °C) to pinpoint test (PPT) A found in the Workshop roughly every 30 seconds – replace Manual (WSM), Section 303-03. both thermostats and radiator. Refer to 2. Verify the venturi tee is installed. WSM, Section 303-03 (Engine Cooling). a. If installed, confirm it is installed correctly (note – orientation direction on part). 5. If vehicle is not drivable and the coolant leak is found to be from the radiator, remove and b. If not installed, install Venturi Tee Kit on replace both thermostats and radiator. Refer to vehicles built on or before 5/15/2008. WSM, Section 303-03 for both radiator and thermostat removal procedure and approved 3. Prepare the vehicle for a test drive. cooling system draining, filling and bleeding a. If the coolant leak at the radiator is large procedures. enough to cause an unsafe test drive or potential for engine/vehicle damage, proceed PART NUMBER PART NAME to Step 5. 8C3Z-8575-D Thermostat Assembly 8C3Z-8009-B Radiator Assembly b. Before driving the vehicle confirm the 8C3Z-8B379-B Venturi Tee coolant level is at minimum level or above in the degas bottle. If required, add 50/50 WARRANTY STATUS: Eligible Under Provisions Of mix to coolant bottle. New Vehicle Limited Warranty Coverage 4. Test Drive – use an Integrated Diagnostic IMPORTANT: Warranty System (IDS) or equivalent and monitor engine coverage limits/policies are oil temperature (EOT) and engine coolant not altered by a TSB. temperature (ECT) parameter identifiers (PIDS). Warranty coverage limits are determined by the identified causal par

2006 Ford Five Hundred SE UPPER INTAKE MANIFOLD REMOVAL AND INSTALLATION MANUAL

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Removal All vehicles 1. Drain the cooling system. For additional information, refer to DRAINING . 2. Disconnect the battery ground cable. For additional information, refer to REMOVAL AND INSTALLATION . 3. Remove the air cleaner outlet pipe. For additional information, refer to REMOVAL AND INSTALLATION . 4. Remove the 4 transaxle roll restrictor cross brace bolts 5. Remove the bolt and the transaxle roll restrictor cross brace. 6. Disconnect the evaporative emissions (EVAP) canister purge valve tube from the upper intake manifold and detach the retainer. 7. Disconnect the positive crankcase ventilation (PCV), brake booster and vacuum harness tubes from the upper intake manifold. 8. Detach the fuel tube retainer from the upper intake manifold. 9. Disconnect the exhaust gas recirculation (EGR) system module electrical connector and vacuum tube. 10. Detach the vacuum tube from the upper intake manifold vacuum tube retainer. 11. Disconnect the EGR system module tube from the EGR system module. Early build 12. Disconnect and plug the throttle body and PCV coolant hoses. Late build 13. Disconnect and plug the 2 PCV coolant hoses. All vehicles 14. Disconnect the throttle body electrical connector. 15. If equipped, remove and discard the 4 upper-to-lower intake manifold screws. 16. Remove the 8 bolts and the upper intake manifold. * Remove and discard the gaskets. Installation All vehicles Fig. 4: Identifying Tightening Sequence Of Bolts Courtesy of FORD MOTOR CO. NOTE: Clean and inspect all sealing surfaces. Install new gaskets 1. Position the upper intake manifold and install the 8 bolts. * Tighten in the sequence shown to 10 N.m (89 lb-in). 2. Connect the throttle body electrical connector. Late build 3. Connect the 2 PCV coolant hoses. Early build 4. Connect the throttle body and PCV coolant hoses. All vehicle 5. Connect the EGR system module tube to the EGR system module. * Tighten to 40 N.m (30 lb-ft). 6. Attach the vacuum tube to the upper intake manifold vacuum tube retainer. 7. Connect the EGR system module electrical connector and vacuum tube. 8. Attach the fuel tube retainer to the upper intake manifold. 9. Connect the PCV, brake booster and vacuum harness tubes to the upper intake manifold. 10. Connect the EVAP canister purge valve tube to the upper intake manifold and attach the retainer. 11. Clean the 4 transaxle roll restrictor cross brace bolts using a wire brush and apply new threadlock to the threads. 12. Position the transaxle roll restrictor cross brace and install the 4 new bolts. * Tighten to 55 N.m (41 lb-ft). 13. Clean the transaxle roll restrictor cross brace-to-roll restrictor bolt using a wire brush and apply new threadlock to the threads. 14. Install a new transaxle roll restrictor cross brace-to-roll restrictor bolt. * Tighten to 48 N.m (35 lb-ft). 15. Install the air cleaner outlet pipe. For additional information, refer to REMOVAL AND INSTALLATION . 16. Connect the battery ground cable. For additional information, refer to REMOVAL AND INSTALLATION . 17. Fill and bleed the cooling system.

2001 Lincoln LS Intake Manifold Upper Removal And Installation Manual

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Intake Manifold — Upper Removal 1. Disconnect the battery ground cable. For additional information, refer to Section 414-01. 2. Drain the engine cooling system. For additional information, refer to Section 303-03 . 3. Remove the engine appearance cover. 4. Remove the air cleaner outlet tube. For additional information, refer to Section 303-12 . 5. Disconnect the throttle position (TP) sensor and the idle air control (IAC) solenoid electrical connectors. 6. Disconnect the accelerator and speed control cables. 7. Remove the cable bracket. 1. Remove the bolts. 2. Remove the bracket. 8. Disconnect the throttle body hoses. 1. Disconnect the coolant hoses. 2. Disconnect the positive crankcase ventilation (PCV) hose. 3. Disconnect the vapor purge hose. 9. Disconnect the vacuum hose. 10. Disconnect the EGR to exhaust manifold tube nut. 11. Remove the cowl vent screen. For additional information, refer to Section 501-02 . 12. Remove the brace. 13. Remove the vacuum hoses from the mounting bracket. 14. Remove the bracket and position the accelerator and cruise control cables aside. 15. Disconnect the differential pressure feedback EGR electrical connector. 16. Remove the stud and nut and position the differential pressure feedback EGR transducer aside. 7. Remove the fuel pressure sensor shield. 1. Remove the nut. 2. Remove the bolts. 3. Remove the shield. 18. Disconnect the vacuum hose from the rear of the upper intake manifold. 19. Disconnect the intake manifold tuning valve (IMTV) electrical connector. 20. Disconnect the exhaust vacuum regulator (EVR). 1. Disconnect the electrical connector. 2. Disconnect the vacuum line. 21. Remove the upper intake support bolt. 22. Remove the front intake manifold support bolt.