3rd motor in 3 years
+ Reply to Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 14 of 37

Thread:
3rd motor in 3 years

  1. #1
    Senior Member bartel's Avatar
    Join Date
    Mar 2010
    Posts
    840

    Default 3rd motor in 3 years

    I have a 1978 crusader mini day.
    I have a basicly stock chevy 2 bolt main 454. has airgap intake hardin headers and a demon 800 carb.

    anyway i have had the boat on the water for 3 years and i have blown up three motors.

    i have used the same engine builder every time. so i think that is going to stop.

    but before i spend more money on a new motor i am wondering if my boat could be causing this.

    the motor is 3 pointed in the boat. has a panther jet so the bell housing clamps right to the pump and i put a bbc mount plate on the front.

    I want to know if there isany way my boat is damaging the motors.

    the first time i spun the bearings out of the motor cant remember what happend the second time and this time i found the cam broken in half and pieces of piston in my oil pan.

    two weeks ago i took the boat to mead and it ran great. i did not notice any noise when putting it onthe trailer. i brought it home and the next time i tried to start it in the back yard. i heard a clucnk and the motor stoped. i thought the starter was stuck. but after digging into the motor i found it was blown up pretty good.

    any insight would be helpfull. i can supply pics if you need them. thanks

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member bartel's Avatar
    Join Date
    Mar 2010
    Posts
    840

    Default

    this is the motor when i pulled it out yesterday


    here is the back of the boat


    the front of the boat


    with the engine cover off


    well that is all i could pull up right now

  4. #3
    Senior Member EVILFORCE's Avatar
    Join Date
    Oct 2009
    Posts
    5,180

    Default

    We need a pic of the girl in the boat.
    No Fool Like A Old Fool is there?

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member Uncle Dave's Avatar
    Join Date
    Aug 2008
    Posts
    2,989

    Default

    Were any engines dyno'd?


    Uncle Dave

  7. #5
    Senior Member bartel's Avatar
    Join Date
    Mar 2010
    Posts
    840

    Default

    Quote Originally Posted by Uncle Dave View Post
    Were any engines dyno'd?


    Uncle Dave
    no just did a cam break in when it was installed in the boat.

  8. #6
    Senior Member EVILFORCE's Avatar
    Join Date
    Oct 2009
    Posts
    5,180

    Default

    How much oil did you drain out of it?
    No Fool Like A Old Fool is there?

  9. #7
    Senior Member bartel's Avatar
    Join Date
    Mar 2010
    Posts
    840

    Default

    Quote Originally Posted by EVILFORCE View Post
    How much oil did you drain out of it?
    i just put ten quarts in the week before this happend? i am not sure it was an oiling issue but could be.

  10. #8
    Senior Member Texgo's Avatar
    Join Date
    Aug 2008
    Location
    South east Texas
    Posts
    228

    Default

    Might need to lighten the foot pressure.

  11. #9
    Senior Member Uncle Dave's Avatar
    Join Date
    Aug 2008
    Posts
    2,989

    Default

    No dyno so you really dont have anything other than an engine and a bill-
    Do you have a build sheet we can look at? So we can see what you are spending your money on.

    Do you hammer them? or have any logical reason they would break- honestly?

    The only thing we have to go on here are your brief failure descriptions.

    a misalinged drive can cause bad accelerated rear main seal and rear bearing wear - sound familiar? - but doesnt break cams

    those headers look older than my old mans ball sack - I wonder if you have a water leak and are hydraulicking.

    Somethings not right for sure.

    just as a comparison I got 10 years out of a 500hp small block I just pulled to freshen up.


    UD
    Last edited by Uncle Dave; 04-08-2010 at 02:25 PM.

  12. #10
    Boss of the McIntyre Mob danhercules's Avatar
    Join Date
    Dec 2007
    Location
    Norco
    Posts
    1,981

    Default

    I was wondering if incorrect motor angle or if the motor could be too close to the pump, if that could mess anything up.


    Very first TPR 21' Deck. 528 BBF 736hp on pump gas built by High Flow Dynamics

    McIntyre Mob. Where the rejects play!

  13. #11
    Senior Member
    Join Date
    Dec 2007
    Location
    corona calif
    Posts
    1,119

    Default P 1000's

    If I were a betting man I would be taking a real close look at your exhaust system.The P 1000's that you are running have a real bad problem leaking internally.Cold water on a hot exhaust valve means that failure is in your future. Take a flash light after you pull the exhaust off and check the exhaust valves my guess is that you have broken the head of an exhaust valve off.

  14. #12
    Senior Member UNASHAMED's Avatar
    Join Date
    Sep 2008
    Location
    Tucson, Az
    Posts
    1,073

    Default

    X2. If you could narrow it down to a certain cyl. have'n the problem or even which side of the motor and if it always seems to be that side or all over the place. it would be much easier to figure out. You may be geting a small amout of water into the cylinder which will cause it to very slightly hydrolock until it finally breaks something.
    "Don't make me get my penguin"

  15. #13
    Senior Member bartel's Avatar
    Join Date
    Mar 2010
    Posts
    840

    Default

    i will look into that as well. i have hooked the headers up to my hose and found no leaks. they are a little old and the exit section i had to lengthin to fit in my boat. but they work way better than the logs and snails that were in the boat.

    nope never gut a build sheet. i got a reciept for damaged pistons borke crank new cam new gaskets seals and bearings. all the normal stuff. but never a build sheet that states bore size clearance or settings.

    there are splines visible on the pump shaft going into the H joint. I need to double check that alignment before i put a new motor in it.

    what is the best way to do that just put a dial gage on it and do some triangle measureing?

    i cant narrow it down to a cylinder. the last time it was a bearing this time complete distruction. i wil lknow more when i go to the engine shop today and see if they have taken it apart yet.

    i would say in a day we probably only do about 15 mins of actual boat time. and that is pushing it. I do like to go fast. but i never pull skiers tubes or anything like that. if i do run flat out it will hit about 5700rpm and i may run it wide open for maybe 30 sec at most. if someone is racing me back to camp. by then we have usually established who is faster so no more reason to race.

    This problem is just getting very expensive and i want to find what it is and correct it before the next motor goes in.

    thanks again for all your help i will check all areas of concern asap.

  16. #14
    Senior Member Uncle Dave's Avatar
    Join Date
    Aug 2008
    Posts
    2,989

    Default

    Shoemakers been around the block a time or two, (no disrespect Greg to speak on behalf of you in the third person) I think Id take a look and see if you have the valve damage he describes.

    We're all going to and zero-ing in on your exhaust though as the most likely suspect and after that ...junk/cheap parts. If you are being level with us.

    Heres the thing, the lack of a build sheet or a dyno run is the earmark of a less than desirable situation, and brings into suspicion use of the cheapest stuff available. It may be true it may not be true, but you dont really know do you? all you have is a third blown engine a lighter wallet, and a question mark.

    Always insist on a build sheet, this way if you have a partial failure you can at least know what parts are in there to go get 1 or 2 of. Without this you are just guessing. and a guy you take it to to fix it up later doesn't know what hes dealing with, or what to match with what.

    If you dont mind sharing what did you pay for these fresh ups/rebuilds from your mystery man that uses mystery parts?


    Uncle Dave

+ Reply to Thread
Page 1 of 3 1 2 3 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