How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask David H Your Own Question

David H
David H, GM master certified
Category: Chevy
Satisfied Customers: 2668
Experience:  Cadillac Technician 18 years cadillac dealer.ase master certified.gm master certified
Type Your Chevy Question Here...
David H is online now
A new question is answered every 9 seconds

Chevrolet Trailblazer How do i remove the intakemanifold on

Customer Question

How do i remove the intakemanifold on a 4.2 liter trailblzer?
Submitted: 3 years ago.
Category: Chevy
Expert:  David H replied 3 years ago.
Here is the removal and installation procedure for the intake manifold.



  1. Disconnect the negative battery cable.
  2. Relieve the fuel pressure.
  3. Remove the throttle body.

  4. Object Number:(NNN) NNN-NNNN Size: SH

  5. Remove the powertrain control module (PCM) retaining bolts (3) and nuts (6).
  6. Remove the PCM mounting studs (5) and position the PCM out of the way.

  7. Object Number:(NNN) NNN-NNNN Size: SH

  8. Disconnect the engine coolant temperature (ECT) sensor electrical connector (1).
  9.  


    Object Number: 730718  Size: SH

  10. Disconnect the fuel feed (1) and fuel return (2) pipes from the fuel rail.
  11. Disconnect the integral clip (3) from the wire harness bracket.

  12. Object Number:(NNN) NNN-NNNN Size: SH

  13. Remove the engine wire harness bracket bolt.
  14. Position the engine electrical wire harness bracket with wires attached out of the way.

  15. Object Number: 732831  Size: SH

  16. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.

  17. Object Number: 637635  Size: SH

  18. Disconnect the crankcase ventilation hose from the intake manifold.

  19. Object Number: 748028  Size: SH

  20. Disconnect the vacuum brake booster hose at the intake manifold.remove the generator

  21. Object Number: 637631  Size: SH

    Important: The intake manifold bolts are captured within the intake manifold. Do not attempt to remove the bolts from the intake manifold.

  22. Loosen the intake manifold bolts.
  23. Remove the intake manifold.

Installation Procedure

  1. Install a new intake manifold gasket to the intake manifold.

  2. Object Number: 637631  Size: SH

  3. Install the intake manifold onto the engine and secure the manifold with the bolts.
  4. Tighten
    Tighten the intake manifold bolts to 10 N·m (89 lb in).

  5. Install the generator.

  6. Object Number: 748028  Size: SH

  7. Install the vacuum brake booster hose to the intake manifold.

  8. Object Number: 637635  Size: SH

  9. Lubricate the inner diameter of the crankcase ventilation hose.
  10. Install the crankcase ventilation hose.

  11. Object Number: 732831  Size: SH

  12. Connect the MAP sensor electrical connector.
  13. Properly position the engine electrical harness bracket to the intake manifold.

  14. Object Number:(NNN) NNN-NNNN Size: SH

  15. Install the engine electrical harness bracket bolt.
  16. Tighten
    Tighten the bolt to 10 N·m (89 lb in).


    Object Number: 730718  Size: SH

  17. Connect the integral clip (3) to the wire harness bracket.
  18. Connect the fuel feed (1) and fuel return (2) pipes to the fuel rail.

  19. Object Number:(NNN) NNN-NNNN Size: SH

  20. Connect the ECT sensor electrical connector (1).

  21. Object Number:(NNN) NNN-NNNN Size: SH

  22. Install the PCM mounting studs (5) to the intake manifold.
  23. Tighten
    Tighten the studs to 6 N·m (53 lb in).

  24. Install the PCM (1) onto the studs (5).
  25. Install the PCM retaining bolts (3).
  26. Tighten
    Tighten the bolts to 8 N·m (71 lb in).

  27. Install the PCM retaining nuts (6).
  28. Tighten
    Tighten the nuts to 8 N·m (71 lb in).

  29. Install the throttle body.
  30. Connect the negative battery cable.
  31. Inspect for leaks using the following procedure:
  32. 19.1. Turn ON the ignition, with the engine OFF for 2 seconds.
    19.2. Turn OFF the ignition, for 10 seconds.
    19.3. Turn ON the ignition, with the engine OFF.
    19.4. Inspect for fuel leaks.

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics