Question about 1993 Chevrolet S-10 Blazer

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94 S-10 4.3 Vortec

I need to replace all the gaskets on the the injector housing/manifold. What can I use to soak this in to remove the gaskets or is there something else I can do? I don't want to use a razorblade because I'm afraid of scrapping off too much of the aluminum housing.

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Many auto parts stores carry a gasket removal spray that will dissolve most gasket materials. Let it soak for at least 15 minutes and then use a scraper.

Posted on Jul 29, 2008

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Gas is getting in the oil?


Check, or let a tech check the gaskets. Don't drive the car till it is solved, just to avoid more damage.

Apr 25, 2015 | Cars & Trucks

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Head gasket or intake manifold gaste again 96 k1500 5.7 vortec. starts runs idles and drives rough it likes to **** while trying to drive almost as if it wants to stall out. i put my scanner on it and


The website has software that looks for obscene words.
I would think a compression test would show if the cylinder is having mechanical problems. And yes the intake or head gasket could be leaking again, especially if the intake or head were warped or cracked.
Have you checked fuel pressure ?
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Feb 09, 2013 | 1996 Chevrolet K1500

1 Answer

Do I have to take the top in take manafold off to tighten the lower intake manafold on a 1993 buick regal 3.8 L engine?


Yes you do, the following info explains the necessary procedure.



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  1. Properly relieve the fuel system pressure.
  2. Disconnect the negative battery cable. Place a clean drain pan under the radiator, open the drain **** and drain the cooling system.
  3. Remove the air cleaner assembly and the fuel injector sight shield.
  4. Disconnect the cables from the throttle body and mount bracket.
  5. Remove the coolant recovery reservoir.
  6. Remove the inner fender electrical cover on the right side.
  7. Remove the right rear crossover pipe heat shield.
  8. Disconnect the fuel lines from the fuel rail and from the cable bracket.
  9. Remove the alternator and brace.
  10. Remove the throttle body cable mounting bracket with the vacuum lines and disconnect the vacuum lines.
  11. Tag and detach the electrical connections at the throttle body and both banks of fuel injectors.
  12. Disconnect the vacuum hoses from the canister purge solenoid valve and transaxle module and intake connection.
  13. Unbolt the power steering pump and move forward. DO NOT disconnect the fluid lines.
  14. Tag and disconnect the spark plug wires position lay aside.
  15. Disconnect the coolant bypass hose from the intake manifold.
  16. Remove the solenoid valve mounting bracket and power steering support brace from the intake manifold.
  17. Disconnect the heater pipes from the intake and front cover.
  18. Remove the alternator support brace from the intake.
  19. Disconnect the upper radiator hose from the housing.
  20. Remove the thermostat housing and thermostat from the intake.
  21. Detach the electrical connector from the temperature sensor and sensor switch.
  22. Unfasten the intake manifold bolts, then remove the manifold as an assembly. Remove and discard the gaskets.
  23. If separating the upper manifold from the lower, proceed as follows:
  24. Remove the fuel rail and fuel injectors.
  25. Detach the coolant sensor switch.
  26. Remove the manifold end cap cover.
  27. Remove the upper intake manifold and throttle body assembly from the lower manifold. Remove and discard the gaskets. To install:
  28. Thoroughly clean all gasket mating surfaces.
  29. If replacing the upper manifold, proceed as follows:
  30. Apply a 1⁄16 in. bead of Loctite® Instant Gasket Eliminator 51845 or equivalent to the lower manifold mating surface. Make sure to circle all bolt holes.
  31. Carefully lower the upper manifold and throttle body assembly onto the lower manifold.
  32. Tighten the upper manifold retaining bolts to 19 ft. lbs. (26 Nm).
  33. Install the manifold end cap cover and the coolant sensor switch.
  34. Install the fuel injectors and rail to the manifold assembly.
  35. Clean the mating surfaces and install the intake manifold gaskets and seals. Apply sealer to the ends of the of the intake manifold seals.
  36. Position the intake manifold and apply a suitable thread lock compound to the bolt threads. Tighten the retaining bolts to 88 inch lbs. (10 Nm), twice, in the sequence shown in the accompanying figure.
  37. Attach the electrical connector to the temperature sensor and sensor switch.
  38. Install the thermostat housing and thermostat with a new gasket.
  39. Connect the alternator support brace to the intake.
  40. Install the solenoid valve mounting bracket and power steering support brace to the intake manifold.
  41. Connect the heater pipes to the intake and front cover.
  42. Attach the coolant bypass hose to the intake manifold.
  43. Install the power steering pump support bracket and tighten to 37 ft. lbs. (50 Nm).
  44. Install the spark plug wires on both sides.
  45. Install the belt tensioner pulley and tighten to 33 ft. lbs. (45 Nm).
  46. Install the power steering pump.
  47. Connect the vacuum hoses to the canister purge solenoid valve and transaxle module and intake connection.
  48. Attach the electrical connections at the throttle body and both banks of fuel injectors.
  49. Install the alternator and brace.
  50. Connect the throttle body cable mounting bracket with the vacuum lines.
  51. Install the right rear crossover pipe heat shield.
  52. Install the cables to the throttle body.
  53. Connect the fuel lines to the fuel rail and mount bracket.
  54. Install the inner fender electrical cover on the right side.
  55. Install the coolant recovery reservoir and upper radiator hose. Fill the cooling system.
  56. Install the air cleaner assembly and the fuel injector sight shield.
  57. Connect the negative battery cable.

Jan 31, 2011 | 1993 Buick Regal

1 Answer

Need to replace the themostat


  • Remove the bolts that hold the thermostat housing onto the intake manifold of the MR2 with an adjustable wrench and pull up on the thermostat housing to remove it from the intake. The housing is still connected to the hose. Lift the thermostat housing and the hose up to drain the antifreeze back into the radiator.
  • 2 Remove the old thermostat from the hole inside of the intake manifold and replace it with a new one. Pull the thermostat gasket off of the top of the intake manifold and wipe the manifold clean with a towel.
  • 3 Place a bead of RTV gasket maker around the bottom edge of the thermostat housing and allow it to dry for 15 minutes. Place the thermostat housing back onto the intake manifold and bolt the housing back into place. Allow 15 more minutes of drying time and slightly tighten the bolts again. This will form a solid seal between the intake manifold and the thermostat housing.



  • Dec 23, 2010 | 1991 Toyota MR2

    1 Answer

    How to remove intake manifold on 2005 Buick Lesabre


    You didn't post the size of your engine so please pick the appropriate one:

    3.8L
    1. Relieve the fuel system pressure.
    2. Drain the cooling system.
    1. Remove or disconnect the following:
    2. Negative battery cable
    • Supercharger
    • Thermostat housing
    • Exhaust Gas Recirculation (EGR) tube at the intake manifold
    • Engine Control Temperature (ECT) sensor
    • Intake manifold
  • To install:

    1. Install or connect the following:
      • Intake manifold with new gaskets. Torque the bolts, working from the center out, to 11 ft. lbs. (15 Nm).
      • ECT sensor connector
      • EGR tube to the intake manifold
      • Thermostat housing
      • Supercharger
      • Negative battery cable
    2. Refill and bleed the cooling system.
    3. Run the engine and check for leaks and proper engine operation.
    4.6L
    4.6L Engine
    1. Remove the brake booster hose from the throttle body.
    2. Remove the fuel pressure regulator vacuum tube from the fuel pressure regulator and the water crossover.
    3. Remove the PCV fresh air feed tube from the camshaft cover and the throttle body.
    4. Remove the PCV dirty air tube from the PCV orifice in the right camshaft cover and from the intake manifold.
    5. Disconnect the fuel injector electrical connectors from the fuel injectors.
    6. Remove the fuel injector wiring harness.
    7. Remove the fuel rail bracket nut from the engine lift bracket.
    8. Remove the fuel rail studs.
    9. Lift and remove the fuel rail with injectors.
    10. Loosen the plenum duct clamp in order to remove the intake manifold.
    11. Remove the intake manifold bolts.
    12. Remove the intake manifold.

    To install:

    1. Install the intake manifold, fitting the plenum duct over the intake manifold duct.
    2. Loosely install the intake manifold bolts.

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    Intake manifold torque sequence-4.6L engine


    1. Tighten the intake manifold bolts in sequence. Tighten the intake manifold bolts to 89 inch lbs. (10 Nm).
    2. Tighten the plenum duct clamp to the intake manifold. Tighten the plenum duct clamp to 24 inch lbs. (2.75 Nm).
    3. Inspect the fuel injector O-rings. Ensure the fuel injector O-rings are not missing, misaligned or damaged. Replace the O-rings if necessary.
    4. Lubricate the intake manifold fuel injector bores with light mineral oil (GM P/N 9981704), clean engine oil, or equivalent.
    5. Install the fuel rail with fuel injectors as an assembly.
    6. Install the fuel rail studs. Tighten the fuel rail studs to 80 inch lbs. (9 Nm).
    7. Install the fuel rail bracket nut to the engine lift bracket. Tighten the fuel rail bracket nut to 89 inch lbs. (10 Nm).
    8. Install the fuel injector wiring harness.
    9. Connect the fuel injector electrical connectors to the fuel injectors.
    10. Install the PCV dirty air tube to the PCV orifice in the right camshaft cover and to the intake manifold.
    11. Install the PCV fresh air feed tube to the camshaft cover and the water crossover.
    12. Install the fuel pressure regulator vacuum tube to the fuel pressure regulator and the throttle body.
    13. Install the brake booster hose to the throttle body.

    Nov 13, 2010 | Buick LeSabre Cars & Trucks

    2 Answers

    Need to replace the intake manifold


    3.8L Engine (most common) Upper Intake Manifold To Remove:
    1. Drain the cooling system.
    2. Remove or disconnect the following:
      • Negative battery cable.
      • Fuel injector sight shield.
      • Air cleaner intake duct.
      • Right spark plug wires from the ignition control module and reposition.
    3. Relieve the fuel pressure.
    4. Remove or disconnect the following:
      • Fuel rail assembly.
      • Brake booster hose from the vacuum source manifold in the upper intake manifold.
      • Exhaust Gas Recirculation Valve (EGR) wiring harness heat shield nut, bolt and the EGR heat shield.
      • Throttle body support bracket upper bolt.
    5. Disconnect the electrical connectors from the following:
      • EVAP purge solenoid
      • Throttle Position (T/P) sensor
      • Idle Air Control (IAC) valve
      • Manifold Absolute Pressure (MAP) sensor
      • Mass Air Flow (MAF) sensor
      • EVAP purge solenoid vacuum line from the throttle body.
      • Accelerator and the cruise control cables with the bracket from the throttle body.
    6. Remove or disconnect the following:
      • Upper intake manifold bolts and stud.
      • Clean the upper intake manifold bolt threads.
    7. Remove or disconnect the following:
      • Upper intake manifold by lifting the back of the intake and sliding the manifold forward from the throttle body support bracket.
      • Upper-to-lower intake manifold carrier gasket from the upper intake manifold.
    8. If the upper intake manifold is being replaced, remove the following:
      • Throttle body assembly.
      • Manifold Absolute Pressure (MAP) sensor.
      • Positive Crankcase Ventilation (PCV) valve.
      • Vacuum source manifold.
    Upper intake manifold bolt torque sequence (3.8L engine) gm-03-38-530.gif

    To Install:
    1. If the manifold was replaced, install or connect the following:
      • Vacuum source manifold.
      • Positive Crankcase Ventilation (PCV) valve.
      • Manifold Absolute Pressure (MAP) sensor.
      • Throttle body assembly.
      • Upper-to-lower intake manifold carrier gasket to the upper intake manifold.
    2. Carefully place the upper intake manifold onto the lower intake manifold. Ensure that the alignment pins in the upper intake manifold align with the holes in the lower intake manifold. NOTE: Apply thread lock compound, to the bolt threads before assembly.
    3. Install or connect the following:
      • Upper intake manifold. Tighten the upper intake manifold bolts in sequence to 89 in lbs (10 Nm)
      • Accelerator and the cruise control cables with the bracket to the throttle body.
      • EVAP purge solenoid vacuum line to the throttle body.
    4. Connect the electrical connectors to the following:
      • Mass Air Flow (MAF) sensor
      • Manifold Absolute Pressure (MAP) sensor
      • Idle Air Control (IAC) valve
      • Throttle Position (T/P) sensor
      • EVAP purge solenoid
    5. Install or connect the following:
      • Throttle body upper support bracket bolt. Tighten the bolt to 89 in lbs (10 Nm)
      • EGR valve wiring harness heat shield, nut and the bolt. Tighten the nut and the bolt to 89 in lbs (10 Nm)
      • Brake booster hose to the vacuum source manifold.
      • Fuel rail assembly.
      • Right spark plug wires.
      • Air cleaner intake duct.
      • Fuel injector sight shield.
    6. Connect the negative battery cable.
    7. Fill the cooling system.
    8. Inspect for fluid or vacuum leaks.
    Lower Intake Manifold (W/O Supercharger) To Remove:
    1. Remove or disconnect the following:
      • Upper intake manifold.
      • Generator brace.
      • Drive belt tensioner with the mounting bracket and the heater water bypass inlet pipe.
      • Exhaust gas recirculation EGR outlet pipe bolt from the lower intake manifold.
      • Radiator inlet hose from the water outlet housing.
      • ECT sensor electrical connector.
      • Right upper engine mount strut bracket.
      • Generator brace bracket bolts.
      • Generator brace bracket.
      • Lower intake manifold bolts.
      • Lower intake manifold.
      • Lower intake manifold seals.
      • Lower intake manifold gaskets.
    2. If replacing the lower intake manifold, Remove or disconnect:
      • Water outlet housing bolt and stud
      • Water outlet housing
      • Gasket and the thermostat.
      • ECT sensor.
    3. Inspect the flatness of inlet flanges.
    4. Clean the intake manifold mating surfaces.
    5. Clean the intake manifold bolts and bolt holes of adhesive compound.
    To Install:
    1. If removed, install the ECT sensor.
      • Tighten the ECT sensor to 18 ft. lbs. (25 Nm)
    2. If removed, install the thermostat, the gasket, and the water outlet housing.
    3. If removed, install the water outlet housing bolt and the stud.
      • Tighten the bolt and stud to 20 ft. lbs. (27 Nm)
    4. Install or connect the following:
      • Lower intake manifold gaskets. NOTE: Apply sealer GM P/N 12346286 (Canadian P/N 10953472) or equivalent to the ends of the intake manifold seals.
      • Lower intake manifold seals.
      • Lower intake manifold.
      • Lower intake manifold bolts.
      NOTE: Apply thread lock compound GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the two hidden bolts and ensure they are installed.
    5. Tighten the lower intake manifold bolts in sequence to 11 ft. lbs. (15 Nm) gmpc_v6_5.gif

    6. Install or connect the following:
      • Generator brace bracket.
      • Generator brace bracket bolts. Tighten the bolts to 37 ft. lbs. (50 Nm)
      • Right upper engine mount strut bracket.
      • ECT sensor electrical connector.
      • Radiator inlet hose to the water outlet housing.
      • EGR outlet pipe to the lower intake manifold.
      • EGR outlet pipe bolt to the lower intake manifold. Tighten the bolt to 21 ft. lbs. (29 Nm)
      • Drive belt tensioner.
      • Generator brace.
      • Upper intake manifold.
    7. Inspect for leaks.
    Lower Intake Manifold (W/ Supercharger) To Remove:
    1. Disconnect the negative battery cable.
    2. Drain the cooling system.
    3. Remove the supercharger.
    4. Remove the thermostat housing.
    5. Remove the EGR pipe at the intake manifold.
    6. Disconnect the electrical connection at the temperature sensor.
    7. Remove the intake manifold and gaskets.
    NOTE: The coolant bypass tube will release from the intake manifold when the manifold is removed.
    To Install:
    1. Clean the gasket sealing surfaces.
    2. Install the intake manifold gaskets.
    3. Align the coolant bypass tube with the opening in the intake manifold and install the manifold. Tighten the bolts to 11 lb ft (15 Nm).
    4. Install the electrical connector to the temperature sensor.
    5. Install the EGR pipe to the intake manifold.
    6. Install the thermostat housing.
    7. Install the supercharger.
    8. Fill the cooling system.
    9. Connect the negative battery cable.

    Aug 05, 2010 | 1997 Pontiac Grand Prix

    1 Answer

    Need to replace intake manifold how do you do this


    Bonneville, LeSabre, Park Avenue 2000-2005 Intake Manifold - Removal & Installation

    3.8L Engine
    VIN 1 Engine
    1. Before servicing the vehicle, refer to the Precautions section.
    2. Relieve the fuel system pressure.
    3. Drain the cooling system.
    4. Remove or disconnect the following:
      Negative battery cable Supercharger Thermostat housing Exhaust Gas Recirculation (EGR) tube at the intake manifold Engine Control Temperature (ECT) sensor Intake manifold
    To install:
    1. Install or connect the following:
      Intake manifold with new gaskets. Torque the bolts, working from the center out, to 11 ft. lbs. (15 Nm). ECT sensor connector EGR tube to the intake manifold Thermostat housing Supercharger Negative battery cable
    2. Refill and bleed the cooling system.
    3. Run the engine and check for leaks and proper engine operation.

    VIN K Engine
    1. Before servicing the vehicle, refer to the Precautions section.
    2. Disconnect the negative battery cable.
    3. Drain the cooling system.
    4. Relieve the fuel system pressure.
    5. Remove or disconnect the following:
      Fuel injector sight shield Air inlet duct Spark plug wires from the right side Manifold Absolute Pressure (MAP) sensor Vacuum lines from the intake manifold Fuel lines Fuel injector electrical connectors Fuel regulator vacuum line Fuel rail from the intake manifold Exhaust Gas Recirculation (EGR) heat shield Throttle cable bracket from the cylinder head mounting bracket and the throttle body cables Throttle body support bracket Upper intake plenum and gasket Thermostat housing Electrical connector from the Engine Coolant Temperature (ECT) sensor Drive belt tensioner assembly EGR valve outlet pipe Lower intake manifold

      a5adffa.jpg
      Fig. Exploded view of the intake manifold and related components-3.8L (VIN K) engine
    To install:


    140d431.jpg
    Fig. Upper intake manifold torque sequence-3.8L (VIN K) engine


    4950e4f.jpg
    Fig. Lower intake manifold torque sequence-3.8L (VIN K) engine
    1. Install or connect the following:
      Intake manifold using new manifold gaskets. Torque the bolts in sequence to 11 ft. lbs. (15 Nm); then, re-torque to 11 ft. lbs. (15 Nm). EGR valve outlet pipe Drive belt tensioner assembly. Torque the tensioner bolts to 37 ft. lbs. (50 Nm). Electrical connector to the ECT sensor Thermostat housing Upper intake plenum. Torque the intake plenum bolts to 88 inch. lbs. (10 Nm). Throttle body support bracket Throttle cable bracket to the cylinder head mounting bracket and the cables to the throttle body lever EGR heat shield Fuel rail. Torque the fuel rail bolts to 88 inch. lbs. (10 Nm). Fuel lines Fuel regulator vacuum line Fuel injector electrical connectors Vacuum lines to the intake manifold MAP sensor Spark plug wires Fuel injector sight shield and air inlet duct Negative battery cable
    2. Refill and bleed the cooling system.
    3. Run the engine and check for leaks and proper engine operation.

    Hope this help (remember rated this).

    May 17, 2010 | 2001 Pontiac Bonneville

    3 Answers

    Strong gas smell and idles rough. did tune up. no


    look at the fuel lines and injectors for signs of leakage.

    Feb 14, 2010 | 1997 Chevrolet K1500

    1 Answer

    Hot do you take off a 98 GMC 5.7 vortec intake


    Note, removing the upper intake manifold is not necessary when removing lower intake manifold, they are removed as an assembly.
    Disconnect negative battery cable. Drain cooling system. Remove air cleaner assembly and inlet duct. Mark and remove distributor. Remove upper radiator hose at thermostat housing. Disconnect accelerator and cruise control cables. Remove heater hoses from intake manifold. Remove EGR pipe.
    Disconnect fuel lines at rear of engine. Remove AC compressor and set aside(leave hoses connected). Remove canister purge solenoid. Disconnect theSCPI injector, ignition coil, Ignition Control Module, generator,IAC motor, TP sensor, O2 sensor, Exhaust Gas Recirculation valve and Engine Coolant Temperature sensor wiring harness connectors. Remove PCV valve and hose. Remove lower intake manifold bolts. Remove lower intake manifold.
    Installation.
    Always use New O-rings when reconnecting fuel lines at rear of engine. Apply a bead of RTV silicone sealer along the front and rear sealing surfaces of the block.See Fig.6. Install new gaskets and intake manifold on block while RTV is still wet to the touch. Use Threadlock 12345382 or equivalent to lower intake manifold bolts. Tighten lower intake manifold bolts in sequence to specification table. See fig. 7. To complete installation, reverse removal procedure.f52665d.gifabc2b5f.gif

    Oct 10, 2009 | 1998 GMC Sierra

    2 Answers

    98 chevy 1500 4.3L vortec misfire problem


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    Feb 18, 2009 | 1998 Chevrolet C1500

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