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 Carhelp4u Your Own Question

Carhelp4u
Carhelp4u, ASE CERTIFIED TECH
Category: Car
Satisfied Customers: 5203
Experience:  ASE CERTIFICATION
Type Your Car Question Here...
Carhelp4u is online now
A new question is answered every 9 seconds

tbi chevy 5.7 valve lash adjustment procedure.

Customer Question

No Comment Added
Submitted: 6 years ago.
Category: Car
Expert:  Carhelp4u replied 6 years ago.

Here is what I have for that procedure. Feel free to contact me with any questions! Good luck!

  1. Disconnect the negative battery cable.

  2. Remove the engine cover.

  3. Remove the rocker arm covers.

  4. To prepare the engine for valve adjustment, rotate the crankshaft until the mark on the damper pulley aligns with the 0 degree mark on the timing plate and the No. 1 piston is on its compression stroke. You will know the No. 1 piston is on its compression stroke because both the intake and exhaust valves will remain closed as the crankshaft damper mark approaches the timing scale.

  5. Another method to tell when the piston is coming up on the compression stroke is by removing the spark plug and placing your thumb over the hole; you will feel the air being forced out of the spark plug hole. Stop turning the crankshaft when the TDC timing mark on the crankshaft pulley is directly aligned with the timing mark pointer or the zero mark on the scale.
  6. With the engine on the compression stroke, adjust the exhaust valves of cylinders No. 1, 3, 4 and 8 and the intake valves of cylinders No. 1, 2, 5 and 7 by performing the following procedures:

    1. Back out the adjusting nut until lash can be felt at the pushrod.

    2. While rotating the pushrod, turn the adjusting nut inward until all the lash is removed.

    3. When the play has disappeared, turn the adjusting nut inward 1 additional turn.

  7. Rotate the crankshaft 1 complete revolution and align the mark on the damper pulley with the 0 degree mark on the timing plate; the engine is now positioned on the No. 6 firing position. This time the No. 6 cylinder valves remain closed as the timing mark approaches the scale. Adjust the exhaust valves of cylinder No. 2, 5, 6 and 7 and the intake valves of cylinders No. 3, 4, 6 and 8 by performing the following procedures:

    1. Back out the adjusting nut until lash can be felt at the pushrod.

    2. While rotating the pushrod, turn the adjusting nut inward until all the lash is removed.

    3. When the play has disappeared, turn the adjusting nut inward 1 additional turn.

  8. Install the rocker arm covers.

  9. Connect the negative battery cable, and verify that there are no leaks.

  10. Turn the engine OFF, then install the engine cover. You may wish to allow the engine to cool first, as you will be working near hot components.

Customer: replied 6 years ago.
what size feeler guage do i use 4 intake and which do i use for exhaust? thank you for a quick response.
Expert:  Carhelp4u replied 6 years ago.
There is no need for a feeler on this setup. What you will need to do is simply get each lifter in the positions identified above. At this point you will simply tighten the rocker arm down until you cannot spin the pushrod with your fingers. At this point you will want to turn the nut on the rocker aduster one full turn. This will set the lifter in the correct position. Feel free to contact me with any further questions!

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 would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician