How often to run valves
+ Reply to Thread
Page 1 of 4 1 2 3 4 LastLast
Results 1 to 14 of 46

Thread:
How often to run valves

  1. #1
    The Man cordog009's Avatar
    Join Date
    Jan 2008
    Location
    East Texas
    Posts
    1,788

    Default How often to run valves

    I'm pretty sure that I've read that you don't have to run the valves everytime you take the boat out with a solid roller cam, but the guy I got my boat from said he had to every time with this setup. It's a 13:1 475 BBC with Brodix BB2 Plus heads, Lunati solid roller 278/286 @ .050, .718/.721 lift. I have a card with the specs and showing 25/27 hot lash. I'm sure it'd be safer to check them every trip out, any suggestions?


    1984 Youngblood TX-19 SOLD

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member cyclone's Avatar
    Join Date
    Dec 2007
    Posts
    3,620

    Default

    Quote Originally Posted by cordog009 View Post
    I'm pretty sure that I've read that you don't have to run the valves everytime you take the boat out with a solid roller cam, but the guy I got my boat from said he had to every time with this setup. It's a 13:1 475 BBC with Brodix BB2 Plus heads, Lunati solid roller 278/286 @ .050, .718/.721 lift. I have a card with the specs and showing 25/27 hot lash. I'm sure it'd be safer to check them every trip out, any suggestions?
    lash them at home, go run the boat and check them when you get home. try to check them at the same temp and note how much they move, if at all. If they don't move then you probably dont need to check them that often.

    I check mine often (shaft rockers) and the lash rarely changes. Still, I check them before every time I run the boat just to keep tabs on the valvetrain.

  4. #3
    "Need For Speed" Gearhead's Avatar
    Join Date
    Jan 2008
    Location
    Atlanta, Texas, United States
    Posts
    1,210

    Default

    CD,

    It is a good idea to keep a regular check on the valves as it gives one a chance to do a valvetrain inspection, but you should not have to check them each outing unless you just really run the crap out of the poor engine.

    You may want to check them at first to see if they are moving and get a feel of the process. If the lash is changing, you are going to want to know why. If you check them and find thelash is indeed not changing, then you can extend intervals. Grammy's lake boat valvetrain is real stable and I only checked it two or three times over the summer, generally at the same time I changed the oil.

    On the race car, we check them each pass, but it is not because the valves need adjusted per say, but is a routine maintenance item, a time for inpection of rocker arms, lash change due to stretching valves, checking springs and lubing pushrod cups, rocker arms and tips. The race car also has a much more agressive cam profile and Nitro can be tough on valves if they get too hot.

    Gear

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    The more often you check, the more likely you are to catch something before it become catastrophic. Tight, maybe tuliped valve, possibly from detonation. Loose, over and over, the roller going away, rocker bearing is toast. We check between every race. Seems like a pain when there is no change, but no change is good. You do it often enough, and it goes pretty quick. Specially with 2 people. One turn the motor, the other running the valves.



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  7. #5
    Senior Member hotbo's Avatar
    Join Date
    Feb 2008
    Location
    lake Ouachita AR
    Posts
    4,677

    Default

    if set-up properly i say you shouldn't have to mess with them more than a couples times over the summer.

    the ole mans 505 with a straub roller little over .700 cnc Brodix heads and such.

    i run them once at the beginning of the season and around the 4th of July,very little change if any,then towards the end.

    it has brodix stud girdles to,that might help

    we run the shit out of it also
    WFLC


    2011 Performer SS
    built by Scott Seastrom.

  8. #6
    Senior Member Hass828's Avatar
    Join Date
    Dec 2007
    Location
    okie, lake Texoma
    Posts
    6,275

    Default

    Quote Originally Posted by hotbo View Post
    if set-up properly i say you shouldn't have to mess with them more than a couples times over the summer.

    the ole mans 505 with a straub roller little over .700 cnc Brodix heads and such.

    i run them once at the beginning of the season and around the 4th of July,very little change if any,then towards the end.

    it has brodix stud girdles to,that might help

    we run the shit out of it also
    Hillbilly.
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
    [email protected] first pass

  9. #7
    LP-25.com Infomaniac's Avatar
    Join Date
    Dec 2007
    Location
    New Port Richey, FL
    Posts
    16,855

    Default

    You have to check the valve lash ??

    Oh Crap !!
    If For Some Reason I Do Something Worthy Of Recognition. God Provided The Ability And Deserves The Credit.


    QE 439 Twin Turbo

  10. #8
    Senior Member hotbo's Avatar
    Join Date
    Feb 2008
    Location
    lake Ouachita AR
    Posts
    4,677

    Default

    Quote Originally Posted by Hass828 View Post
    Hillbilly.

    if it was turboed i wouldn't have to check at all

    EFI rocks


    ive never had any trouble with lash on solid rollers or solid flats.

    guess im lucky b/c of Hillbilly status
    WFLC


    2011 Performer SS
    built by Scott Seastrom.

  11. #9
    mo balls than $cents$ IMPATIENT 1's Avatar
    Join Date
    Dec 2007
    Location
    hugo,okla
    Posts
    11,729

    Default

    Quote Originally Posted by hotbo View Post
    if it was turboed i wouldn't have to check at all

    EFI rocks


    ive never had any trouble with lash on solid rollers or solid flats.

    guess im lucky b/c of Hillbilly status
    every great once in awhile you'll run into a new engine set-up that the pushrods dont fit the lifter cups very well and you'll run the engine 10seconds, shut it off and recheck lash only to find they allllll changed. the pushrods will make their way deeper into the cups and open up lash of course comp lifters seem to do that alot if you've got manley pushrods, seen it on 2 diff engines in the past 4-5yrs

    Dare to be different, if it turns out great you can claim you planned it that way.

    Jetboatperformance.com

  12. #10
    Senior Member Hass828's Avatar
    Join Date
    Dec 2007
    Location
    okie, lake Texoma
    Posts
    6,275

    Default

    Quote Originally Posted by hotbo View Post
    if it was turboed i wouldn't have to check at all

    EFI rocks


    ive never had any trouble with lash on solid rollers or solid flats.

    guess im lucky b/c of Hillbilly status
    just givin ya some crap. Hows that new rig comin ?


    Oh, and check your lash every trip at first then if it stays put check about every other trip. If something starts to go away you want to catch it as quickly as possible. Valve train isnt something to be lazy about.
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
    [email protected] first pass

  13. #11
    Senior Member hotbo's Avatar
    Join Date
    Feb 2008
    Location
    lake Ouachita AR
    Posts
    4,677

    Default

    Quote Originally Posted by Hass828 View Post
    just givin ya some crap. Hows that new rig comin ?


    Oh, and check your lash every trip at first then if it stays put check about every other trip. If something starts to go away you want to catch it as quickly as possible. Valve train isnt something to be lazy about.

    i was just playin 2

    my boat builder has been busy in other areas,lol!!!!!!

    gonna have to get a cattle prod after him i guess
    WFLC


    2011 Performer SS
    built by Scott Seastrom.

  14. #12
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,269

    Default

    I like playing with this stuff, so sometimes I'll just get up early in the AM, have my coffee, and go check my lash. I've been known to wake up in the middle of the night wandering around the house with feeler gauges in my hand, sleep walking. That's a little disturbing.
    Lash should be checked when you get your mail, and evey time you get gas. I don't mind checking in the morning, and then during the heat of the day...you never know what a few tenths of lash change can do. Oh, and every time I change lash, I immediately get on then dyno to document the difference.
    I'm also careful to measure my feeler gauges to ensure that the settings are consistent from one check to another. I've seen as many as .3-.4^6 difference, and that's going to cause problems if you don't catch it. This is for my personal weekend stuff...
    On racing engines I'm a little more careful.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  15. #13
    Senior Member TNYoungblood's Avatar
    Join Date
    Mar 2010
    Location
    Clarksville, TN
    Posts
    5,104

    Default

    We usually boat all weekend here so I usually run through mine about every other weekend unless I hear or fill something aint right .. I'd say keep a check on it just to be on the safe side .. We got 1 guy that runs the hell outta his boat every weekend and has never touched his .. I have ask him if he checked his lash, He said "WHATS THAT, I JUST PUT GAS IN THE THING" ... I cant do that
    WFLC The REAL #321 Kentucky Drag Boat Association 2016 NJBA 10.0 High Points Champ

  16. #14
    Senior Member wagspe208's Avatar
    Join Date
    Apr 2008
    Location
    waterloo
    Posts
    2,034

    Default

    I checked mine 2 x this year whether it needed it or not. LOL
    This is bad practice, though.
    How often depends on camshaft profile, springs, rpm, application, valvetrain (lifters, pushrods, rocker arms, etc.)
    I run Jesel stuff and it does not change. Iron heads. I'd recommend every race weekend if a drag application. If nothing moves, great, if it is, make notes to see what is going on and where.
    Wags

+ Reply to Thread
Page 1 of 4 1 2 3 4 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95