poping noise on a fresh bbc
+ Reply to Thread
Results 1 to 12 of 12

Thread:
poping noise on a fresh bbc

  1. #1
    Member
    Join Date
    Jul 2009
    Location
    Las Vegas NV
    Posts
    39

    Default poping noise on a fresh bbc

    i just rebuilt my 454 and i dont know where it is coming from. i think it is in the pump but im not sure.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member jetboatperformance's Avatar
    Join Date
    Dec 2007
    Location
    Atascadero Calif
    Posts
    7,463

    Default

    Whats the noise ?? and where and when can you hear it ? jets make "rattlings" and "growlings",grindings and clunkedy clunks but not usually "poppings" ?? Tom

  4. #3
    Amber Racing Services BUSBY's Avatar
    Join Date
    Dec 2007
    Location
    So Cal
    Posts
    4,337

    Default

    Quote Originally Posted by jetboatperformance View Post
    Whats the noise ?? and where and when can you hear it ? jets make "rattlings" and "growlings",grindings and clunkedy clunks but not usually "poppings" ?? Tom
    Ok, now I'm laughing. (only because I have found myself in the past making some sort of noise to try and describe things to customers)

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Member
    Join Date
    Jul 2009
    Location
    Las Vegas NV
    Posts
    39

    Default

    well we were runnin it hooked to a hose, we had water comin out the back of the snout while we were breakin in the cam,after the cam break in, we adjusted the valves after a warm up. And while rollin the motor over by hand it was makin more of a clunk sound. and then idling we could feel it in the hull under our feet.

  7. #5
    Senior Member jetboatperformance's Avatar
    Join Date
    Dec 2007
    Location
    Atascadero Calif
    Posts
    7,463

    Default

    Quote Originally Posted by BUSBY View Post
    Ok, now I'm laughing. (only because I have found myself in the past making some sort of noise to try and describe things to customers)
    Brian Beer helps with mechanical noise simulations

    Rallison likely your hearing what we call "machine noise" it can be horendous and comes and goes around 1500 rpms or so its worse with stainless and bronze impellers (weight) and will likely disipate when you put the boat in the water (load on the impeller) you can eliminate it with a new pump shaft and drive line you can also ": deaden sometimes it if you "dope" your clean DL and shaft splines with a small amount clear silicone sealer when installing same Tom

  8. #6
    Senior Member 76 Bonneville's Avatar
    Join Date
    Mar 2008
    Location
    Valley Center Ca
    Posts
    744

    Default

    U- joints? Clunking while rolling it over by hand.
    Last edited by 76 Bonneville; 08-31-2009 at 10:15 PM.

  9. #7
    Member
    Join Date
    Jul 2009
    Location
    Las Vegas NV
    Posts
    39

    Default

    we were drinkin beer and your right its more of a clunk. even drinking beer we can still feel it bare foot in the hull

  10. #8
    Super Moderator HammerDown's Avatar
    Join Date
    Dec 2007
    Location
    The Right Coast/SE-PA
    Posts
    5,488

    Default

    Quote Originally Posted by rallison View Post
    i just rebuilt my 454 and i dont know where it is coming from. i think it is in the pump but im not sure.
    For engine poping problems...some things to check
    *poping out the carb or exhaust...?
    *Flat tappet cam...? I wiped a lobe in 20 minutes (pop-pop) >been there done that.
    *Could be as simple as a cracked spark plug (more of a miss)>been there done that.
    *Carb too lean >never been there.
    *Vacuum leak >see above >never been there.
    *Timing way off? >nope never been there well, a few degrees until I put a light on it.

    As mentioned above...dunk the boat, on the trailer to load the pump...if noise goes away it's not the engine.
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

  11. #9
    Member
    Join Date
    Jul 2009
    Location
    Las Vegas NV
    Posts
    39

    Default

    ok thanks guys, we are gonna time it tomorrow and if thats not it sounds like a middle of the week lake trip.

  12. #10
    Amber Racing Services BUSBY's Avatar
    Join Date
    Dec 2007
    Location
    So Cal
    Posts
    4,337

    Default

    Quote Originally Posted by jetboatperformance View Post
    Brian Beer helps with mechanical noise simulations
    Good ... then I should be a noise makin fool

  13. #11
    "Try it Now!" Tahiti Boss21's Avatar
    Join Date
    Jun 2008
    Location
    Yucaipa, California
    Posts
    3,704

    Default

    Quote Originally Posted by jetboatperformance View Post
    Whats the noise ?? and where and when can you hear it ? jets make "rattlings" and "growlings",grindings and clunkedy clunks but not usually "poppings" ?? Tom
    Someone steal that one for a sig line lol
    1992 Eliminator Daytona 21'

  14. #12
    ... Some Kind Of Monster's Avatar
    Join Date
    Dec 2007
    Location
    East Side
    Posts
    2,056

    Default

    Quote Originally Posted by Tahiti Boss21 View Post
    Someone steal that one for a sig line lol
    Quote Originally Posted by BUSBY View Post
    Good ... then I should be a noise makin fool
    I like this one better

+ Reply to Thread

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