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 GM-Frank Your Own Question

GM-Frank
GM-Frank, ASE Master Certified
Category: Car
Satisfied Customers: 431
Experience:  37 Years Automotive Diagnosis & Repair. Experience with all makes and models..
10184299
Type Your Car Question Here...
GM-Frank is online now
A new question is answered every 9 seconds

I have a 1989 ford ranger 2.9v6 has hydraulic lifters with ...

Resolved Question:

I have a 1989 ford ranger 2.9v6 has hydraulic lifters with a manual adjustment, there was a bad push rod that was replaced, now all the lifters need to be re-adjusted but I am confused as the the instructions on repair
not sure what this means, how do I know if the tappets are in the base circle area??

"On the cylinder to be adjusted, position the cams so that the tappets are in the base circle area"
Submitted: 6 years ago via ChiltonDIY.
Category: Car
Expert:  GM-Frank replied 6 years ago.

 

HelloCustomer

The base circle is the area of the cam lobe that is at the exact opposite area of the camshaft as the highest point of lift.

Therefore when the valve is opened all the way, the lifter is sitting at the top of the cam lift. When the camshaft is rotated 180 degrees, it will be at the base circle.

You want to have the cam positioned with the lifter at it's least area of lift or the base circle for your adjustment.

If you have replaced the lifters, be careful, because they want the lash before the 1.5 turn to be at zero before the lifter plunger has begun to move. If the plunger is at the bottom of the lifter already, they your valve will not close after you make the adjustment.

  1. Position cams so that tappets are in the base circle area on cylinder to be adjusted.
  2. Loosen adjusting screws until a distinct lash between roller arm pad and valve tip end can be noticed. Tappet plunger should now be fully extended.
  3. Screw in adjustment screws until roller arms slightly touch valves.
  4. Screw in adjustment screw an additional 1-1/2 turns (equivalent to .070 inch plunger travel into lifter) to achieve normal operating position.

 

graphic

 

I hope this explains your question.

Any other questions, please feel free to ask

Have a Great Day

Frank

GM-Frank, ASE Master Certified
Category: Car
Satisfied Customers: 431
Experience: 37 Years Automotive Diagnosis & Repair. Experience with all makes and models..
GM-Frank and 13 other Car Specialists are ready to help you
Customer: replied 6 years ago.
Reply to GM-Frank's Post: "You want to have the cam positioned with the lifter at it's least area of lift or the base circle for your adjustment"

sorry if i seem stupid, but how do I know when this is?
Expert:  GM-Frank replied 6 years ago.

 

So as not to confuse you and to make is as simple as possible.

Take off the distributor cap, and adjust the Intake and Exhaust valves of the

cylinder that the rotor is pointing toward.

graphic

So bring up number one cylinder while the distributor cap is off and see that the rotor is pointing to the number one spark plug wire tower on the cap.. This will place the number one cylinder intake and exhaust valves on the base circle. Adjust those 2 then move to the number 4 cylinder.

Watch the rotor move as you slowly rotate the engine to where the rotor points to the tower where the number 4 wire is connected. This places number 4 intake and exhaust lobes of # XXXXX cyl on the base circle. Adjust them and then move on through the firing order to number 2 then 5 then 3 then 6.

I hope this helps

Frank

Customer: replied 6 years ago.
Thank you, XXXXX XXXXX help alot, I'll go give that a try.
now my understanding is, when it is at this point, loosen the adjuster, then tighten until snug (zero lash) then 1.5 turns more correct?
Expert:  GM-Frank replied 6 years ago.

 

That is correct.

As you are beginning to tighten to take the lash to zero, be very careful and have that adjustment just take out the play with a light touch. Then do the 1.5 turn.

You got it.

Frank

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
 
 
 
Chat Now With An Auto Mechanic
GM-Frank
GM-Frank
273 Satisfied Customers
37 Years Automotive Diagnosis & Repair. Experience with all makes and models..