1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Valve Seals Without Timing Belt Replacement - 4.7L

Discussion in '1st Gen Tundras (2000-2006)' started by SilverArrowR129, Mar 27, 2021.

  1. Mar 27, 2021 at 9:21 AM
    #1
    SilverArrowR129

    SilverArrowR129 [OP] New Member

    Joined:
    Mar 27, 2021
    Member:
    #61023
    Messages:
    2
    Gender:
    Male
    Vehicle:
    2005 Tundra
    Hi all - first post. I have a very good friend with a 2005 Tundra V8. I end up doing a lot of work for/with him on the truck -- mainly because I have a lift and many, many tools.

    He came to me asking if we could do the valve seals -- I've done valve seals many times but mostly on domestic stuff and never on overhead cams (though I have changed timing belts on OHC vehicles).

    So my question is -- do we treat this as a full blown timing belt change (new water pump, pulleys, tensioner, etc), or if that has been very recently done, can we just take the front of the engine down to where I can get to the timing belt tensioner, remove that to have enough slack to remove the belt and cams to get to the valve seals? And then go through the normal cam replacement process?

    Thanks in advance.
     
  2. Mar 27, 2021 at 10:16 AM
    #2
    KNABORES

    KNABORES Sarcasm incoming

    Joined:
    Jan 1, 2020
    Member:
    #40572
    Messages:
    8,923
    Gender:
    Male
    Arkansas
    Vehicle:
    2000 Limited TRD AC 4X4 Thunder Grey 270k miles. 2019 Limited TRD CM 4x4 Cement Grey 75k miles
    2000: Bilstein 5100's 16x8 589's with 265/75/16 and 1.25" spacers Flowmaster 50 series over the axle dump Pioneer touchscreen with backup camera Full interior and dash LED conversion Trailer brake controller with 7 pin Bedliner coat bumpers & trim ARE topper 2019: ARE topper with full Bedrug kit and Vortex rack TRD shifter 1.25" wheel spacers (I like to live dangerously) Red tow hooks for that +15 grip bonus
    The 05 will be pretty involved with it's DOHC VVTi setup. I'm always of the opinion that if some other clown can do the work then this clown could probably do it as well. Researching the procedure and having the proper FSM and tools and parts to do the job before breaking it down is a must for me. If it were me and I was getting that deep in, I would do the full timing belt, water pump, tensioners, serpentine belt, possibly radiator, fan bearing and additional Fluids and filters.
     
    speedtre likes this.
  3. Mar 27, 2021 at 11:04 AM
    #3
    speedtre

    speedtre New Member

    Joined:
    Jan 20, 2019
    Member:
    #24808
    Messages:
    1,696
    Inland Northwest
    Vehicle:
    2006 BSM Toyota Tundra DC TRD 4x4
    I would step back and ask why you are doing valve seals? I've never heard of doing valve seals in these motors unless you are doing a full rebuild. These motors are not known for problematic valve seals, say like 90s Mitsubishi V6s that ate valve guide seals for lunch every 75k miles.

    I concur if you are going to be in there do it all unless it's been done in the last 40K miles already...consider a radiator as well if it's original.
     
    Jack McCarthy and YardBird like this.
  4. Mar 27, 2021 at 11:08 AM
    #4
    YardBird

    YardBird Native San Diegan

    Joined:
    Jan 15, 2019
    Member:
    #24572
    Messages:
    7,534
    Gender:
    Male
    First Name:
    Jonesy
    Vehicle:
    2005 RCLB
    American Thunder Cat Back ~ Retrax Pro ~ Toyota Bed Mat ~ OEM Split Spoke Wheels
  5. Mar 27, 2021 at 10:07 PM
    #5
    seth419

    seth419 New Member

    Joined:
    Nov 7, 2018
    Member:
    #21461
    Messages:
    283
    Gender:
    Male
    Santa Barbara, CA
    Vehicle:
    2005 Tundra DC 4x4
    Do you mean valve cover gaskets? Those will weep over time and are pretty easy to replace.
     
  6. Mar 27, 2021 at 11:06 PM
    #6
    empty_lord

    empty_lord They see me rollin'

    Joined:
    Feb 1, 2019
    Member:
    #25441
    Messages:
    10,024
    Gender:
    Male
    First Name:
    Dan
    Indiana, Chicagoland
    Vehicle:
    05 rollover special
    custom body work, Billies with taco ARB springs, Icon AAL, TRD FJ trail team wheels, 2019 Toyota 86 radio, Blacked out interior, Added factory power everything, heater mirrors, ETC
    you have to remove the belt. but if its a new enough belt and you make marks on it BEFORE removal (WITH AN ARROW POINTED TOWARD THE FRONT OF THE ENGINE, orientation matters when going off the marks!) . you can reuse it. you will need a valve seal remover to get the seals off since they sit in pockets where the buckets live. Lisel makes a good tool i use. When replacing the exhaust seals are a different color from the intake seals.
     
  7. Mar 28, 2021 at 9:30 AM
    #7
    SilverArrowR129

    SilverArrowR129 [OP] New Member

    Joined:
    Mar 27, 2021
    Member:
    #61023
    Messages:
    2
    Gender:
    Male
    Vehicle:
    2005 Tundra
    thanks all - he informed me that he has about 100k on the current belt. So going to help him do that. Would be nice to not have to pull the cams for the valve seals and just tackle it as a straight up timing belt job. The cylinder 8 plug was oily - the rest looked fine. He says he gets white smoke at startup (I said, 'no big deal') and he also says it chugs and shakes going uphill. I guess his research on white smoke pointed him to valve seals and perhaps he is relating the two. Any advice to talk him off the 'remove the cams for the valve seals' ledge? I think that is a path we don't need to go down.

    I think he said, about 150k miles on the truck and he bought it at 50k. Has no specific recollection of having a timing belt done but is checking his records.
     
  8. Mar 28, 2021 at 10:17 AM
    #8
    JohnLakeman

    JohnLakeman Burning Internet Daylight

    Joined:
    Feb 21, 2019
    Member:
    #26430
    Messages:
    3,008
    Gender:
    Male
    Outside of Weird, TX
    Vehicle:
    2017 MGM DC TSS 4.6L
    TRD Pro grille, 2018 LED Headlights, Undercover Flex bed cover, Neoprene seat covers, Bed/tailgate mats, Power tailgate lock, auto headlights, illuminated key switch
    If not steam from condensate, white exhaust smoke is usually coolant burning. Oil smoke will have a blue tint to it.

    Oily #8 plug only says it's not firing (chugs and shakes?). I would be sure of the diagnosis. Sounds like he needs to spend some money, but I would be sure the money is going to the right location.
     
    speedtre likes this.

Products Discussed in

To Top