A new question is answered every 9 seconds

2005 F150: my tensioner for the timing chain went bad..cam

This answer was rated:

My tensioner for the timing chain went bad on my 2005 F150. I am being told that the cam lobes are scared. They are telling me that they need to replace the engine. This cain;t be right. There is no loss of oil and no smoke. can you ehlp

Hello Tomtaylor,

Thanks for coming to Just Answer to ask a question.


How much engine disassembly have they done to verify this?

What brand and grade oil do you use as well as the filter and at what mileage interval do you change the oil?

Customer: replied 7 years ago.
they have taken the front cover off. the tensioner was actually split in 2. I am not sure if this happeed wehn the took it off. The truck was running fine. I took the truck in because of a window problem. It just so happens the check engine light cam on the same day I had window troubles.

I had a pens-oil filter on and I have been figiallant in chaning the oil every 5000 miles. The truck has 107500 miles on it.

They say there is some scarring on the cam lobe?
Ford has gotten alot of engines back when they were replaced and found aftermarket oil filters have deteriorated and left parts stuck in oil gallaries thus restricting flow to areas of the engine. So the fact of not using a motorcraft filter and 5w-20 synthetic blend from motorcraft may be the reason this has occured. As for the chain tensioner broked or causing the chain to be loose can be repaired with new chains and guides and actuators. As for the cams they can also be replaced quite easy during this repair. I do not see any reason for a new motor at this time based on just the parts you have listed worn or damaged.
Customer: replied 7 years ago.
One more clarification, the fact that the engine was running o.k. and the check eninge light came on the day I took it in should not have caused any further damage to the engine? also how severe does the scaring on the cam lobe have to be before it cause further damge to the engine. If I use Motorcraft and 5w-20 oil will this help decrease psossiblitie of further dmage. And should I change the oil in the next few times before 5000 mile sto assure that there is not any metal shavings in the oil?

Question1- There can be minor amounts of damage going un-noticed but while torn down its a good idea to go ahead and address. Most likely you have cam codes like timing out out spec thus inducing the repair.

2- Scarring really will not cause any damage to the engine below the cam and rollers for the valves, thus me wondering why they say a engine is needed. An engine can even continue running with scarring and can run for quite some time. You will begin to notice power loss once it gets really bad.

3- Yes using ford products and ford specified grade will help in preventing failures. Ford stands behind there products stateing they will increase the longevity of the engine.

4- I would change the oil at a 1000 mile interval after this repair


I personally change my 06 F250 V10 oil every 3k, I do this because I drive short trips, 8 miles a day 4 times, which is bad on oil.

I change my wifes 08 escape 2.3L oil every 6k, I do this because she drives the interstate twice a day for 55 miles one wya and hwy miles and long trips are not harsh on oil.

Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 43547
Experience: 16 years experience
Chris (aka- Moose) and 2 other Ford Specialists are ready to help you
Customer: replied 7 years ago.
Thanks so much. You have been a big help!
Your welcome
Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 43547
Experience:  16 years experience
Type Your Ford Question Here...
Chris (aka- Moose) is online now
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.

What Customers are Saying:

  • AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on. Rich D USA
< Previous | Next >
  • AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on. Rich D USA
  • Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me. Molly USA
  • I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service. Jason V. Kirkland, WA
  • I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there. BR New Jersey
  • 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

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.

Meet The Experts:

  • Ron


    ASE Certified Technician

    Satisfied Customers:

    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
< Last | Next >
  • http://ww2.justanswer.com/uploads/FO/fordguyu/2015-7-7_172556_onnieew.64x64.jpg Ron's Avatar


    ASE Certified Technician

    Satisfied Customers:

    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)


    Satisfied Customers:

    16 years experience
  • http://ww2.justanswer.com/uploads/JM/jmcdo28/2012-2-23_01655_resized.64x64.jpg John Mc's Avatar

    John Mc

    Ford Technician

    Satisfied Customers:

    19 years Ford Lincoln Mercury experience
  • http://ww2.justanswer.com/uploads/wmarti7/2009-4-18_04332_Avatar.jpg Chuck's Avatar


    ASE Certified Technician

    Satisfied Customers:

    33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
  • http://ww2.justanswer.com/uploads/BL/Bluegorilla/2012-6-21_16298_cam.64x64.JPG Cam's Avatar


    Journeyman Automotive Technician

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years Automotive experience.
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar


    ASE Certified Technician

    Satisfied Customers:

    12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.
  • http://ww2.justanswer.com/uploads/BA/baddad1/2014-4-1_23659_avatar.64x64.jpg Mike V.'s Avatar

    Mike V.

    Auto Service Technician

    Satisfied Customers:

    25 years experience on all makes and models, Licensed NYS Inspector.