Question about 1994 Geo Tracker

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Replace exhaust manifold

How do I remove and install exhaust manifold including torque specs.

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  • 4 more comments 
  • Lisa Campbell
    Lisa Campbell Mar 29, 2014

    Okay so far we've got the manifold disconnected from the engine but the 2 of the 3 bolts going to the exhaust pipe are giving us fits...this is a 1.6 engine

  • _-__-___-_
    _-__-___-_ Mar 30, 2014

    Quite normal. 20years there. rust. 3 bolts, you mean its nuts, right? 3 nuts. the 8valve engine has 3 nuts. I heat it with a torch or run engine, as it cools and spray penetrating oil on the nuts/studs. as it cools the pen oil sucks in and can release it. the other tactic, used is (last) heat it and try to get the nuts off.

  • _-__-___-_
    _-__-___-_ Mar 30, 2014

    which engine. G16 (4 injector engine or 1) black top or silver top. see 8v manifold next

  • _-__-___-_
    _-__-___-_ Mar 30, 2014

    http://www.fixkick.com/engine/8v/exhaust...

  • _-__-___-_
    _-__-___-_ Mar 30, 2014

    most 16valve look like this. (called the long heard ) this is short header too.

  • _-__-___-_
    _-__-___-_ Mar 30, 2014

    http://www.fixkick.com/sensors/EGR/exh-c...

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  • Geo Master
  • 20,706 Answers

Which engine.? 8v or 16v.

the manifold unbolts, see the studs there. they are nuts acutally

the trail pipe flange , has.

on the 8v, engine has 3 nuts and washers.

the 16v engine runs a donut ring, and 2 long spring loaded bolts.

that love to seize.

it just unbolts but rust is devil we all deal with.

the 16v has 2 bolt flange on top that holds up the AIR PIPE>. huge.

here is the torque page.

http://www.fixkick.com/specs/torque1.html



the 16v torques work too, on this full fsm under engine.

http://www.acksfaq.com/trackerfsm.htm

read the section on exh, man. they put the torque\'s, in line.



here is a slide show of the 16v.

http://www.fixkick.com/engine/97-motor-pull/HTML/image_58.html



here is both,

http://www.fixkick.com/exhaust/92-95all.pdf

Posted on Mar 29, 2014

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2b507d0.jpg

Fig. Left side exhaust manifold bolt torque sequence-3.0L engine


22ac5ae.jpg

Fig. Right side exhaust manifold bolt torque sequence-3.0L engine

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Exhaust Manifold

REMOVAL & INSTALLATION

2.4L Engine


  1. Remove or disconnect the following:

    • Negative battery cable

    CAUTION
    Wait at least 90 seconds after the negative
    battery cable is disconnected to prevent possible deployment of the air bag.


  2. Heat cowl from the exhaust manifold
  3. Aspirator valve assembly, if equipped
  4. Oil dipstick and guide
  5. Oxygen (O2S) sensor connector and ground cable, if equipped
  6. Exhaust pipe from the manifold
  7. Exhaust manifold and gasket from the engine
    To install:

  8. Install or connect the following:

    • Exhaust manifold. Torque the M8 mounting nuts to 22 ft. lbs. (29 Nm) and the
      M10 mounting bolts 36 ft. lbs. (49 Nm). starting from the middle and working
      outward.
    • O2S sensor connector and ground cable, if equipped
    • Exhaust pipe to the manifold. Torque the nuts to 35ft. (49 Nm).
    • Aspirator valve assembly, if removed
    • Heat cowl to the exhaust manifold. Torque the bolts to 117 inch lbs. (13
      Nm).
    • Negative battery cable

  9. Start the engine and check for exhaust leaks.


3.0L and 3.5L Engines


  1. Remove or disconnect the following:

    • Negative battery cable
    • Exhaust pipe from the exhaust manifolds
    • Oil dipstick, guide and O-ring
    • Heat shields
    • Exhaust manifolds

  2. Clean the gasket mounting surfaces. Inspect the manifolds for cracks,
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    To install:

  3. Install or connect the following:

    • New gasket and exhaust manifold. Torque the nuts to 33 ft. lbs. (44 Nm) on
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    • Oil dipstick, guide and new O-ring
    • Negative battery cable

  4. Start the engine and check for exhaust leaks.


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