U joint question
+ Reply to Thread
Results 1 to 7 of 7

Thread:
U joint question

  1. #1
    Senior Member
    Join Date
    Aug 2012
    Posts
    187

    Default U joint question

    Last trip out as I was getting up on plane, I hear some constant loud knocking coming from the rear of the boat, sounded like engine was letting go. Good oil pressure and temperature. Removed valve covers, cut oil filter, nothing...clean, plugs good as well. Still not saying I don't have an engine going south but thought I'd take a look at the drive line before pulling it.

    My question is; how many bolts connect the u joint to the flexplate? There are three in a triangle pattern but I'm seeing a 4th hole with nothing in it. Wondering if that empty hole is for a universal set up or have I sheared a bolt?

    Another question, if in fact this noise is coming from the u joint, would grease alone correct that? I have also greased the zerk at the pump/yoke.

    No trash in the pump looking down the inspection hole however, I haven't had time to remove the grate to check for shaft play....that's job next.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Ujoint.jpg 
Views:	36 
Size:	11.0 KB 
ID:	976537  

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Feb 2015
    Location
    619
    Posts
    595

    Default

    Crank dowel pin hole,,,,
    Slinging Lead on and off the water for over 40 YRS

    82 18' Crusader Tunnel SOLD ,
    00 23' Mako 232 fish killer,SOLD
    78 19' Eliminator Daytona SOLD
    16 19' Predator/Cheyenne

  4. #3
    Senior Member SoldHondaBoughtHondo's Avatar
    Join Date
    Oct 2009
    Location
    Lake Havasu az.
    Posts
    4,318

    Default

    U-joint companion flange has 4 bolts that attach it to adapter that bolts to the crank..if it only has 3, that is a problem. Bad u-joint will be loose in the caps or have tight spots as it is rotated.

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member
    Join Date
    Apr 2010
    Location
    Rocklin, Calif.
    Posts
    1,394

    Default

    Look for cracked or broke flex-plate also

  7. #5
    Senior Member
    Join Date
    Aug 2012
    Posts
    187

    Default

    Many thanks for the replies, flash light and mirror confirmed crank dowel pin hole. Drive line is fine, engine is terminal. Back to square one.....

  8. #6
    Senior Member
    Join Date
    Feb 2015
    Location
    619
    Posts
    595

    Default

    Quote Originally Posted by 1320 View Post
    Many thanks for the replies, flash light and mirror confirmed crank dowel pin hole. Drive line is fine, engine is terminal. Back to square one.....
    What do I get,12 pack of IPA
    Slinging Lead on and off the water for over 40 YRS

    82 18' Crusader Tunnel SOLD ,
    00 23' Mako 232 fish killer,SOLD
    78 19' Eliminator Daytona SOLD
    16 19' Predator/Cheyenne

  9. #7
    Senior Member
    Join Date
    Aug 2012
    Posts
    187

    Default

    Quote Originally Posted by leadslinger View Post
    What do I get,12 pack of IPA

    Hell yes!

+ 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


Tags for this Thread

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