455 Olds Pushrod failure?
+ Reply to Thread
Results 1 to 6 of 6

Thread:
455 Olds Pushrod failure?

  1. #1
    "Mad" Member Jet Mad's Avatar
    Join Date
    Dec 2008
    Location
    Cape Town, South Africa
    Posts
    769

    Default 455 Olds Pushrod failure?

    What could cause pushrods to bend in such a way that I can't even get them pulled out after removing the rocker assembly. It happened on a stock 455. (a friends engine)

    The valves are not stuck - #8 cylinder - Intake and Exhaust.

    Any ideas?

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member GT Jets's Avatar
    Join Date
    Jun 2008
    Location
    Morgan Hill
    Posts
    2,234

    Default

    Quote Originally Posted by Jet mad View Post
    What could cause pushrods to bend in such a way that I can't even get them pulled out after removing the rocker assembly. It happened on a stock 455. (a friends engine)

    The valves are not stuck - #8 cylinder - Intake and Exhaust.

    Any ideas?
    Hydraulicing a cylinder can keep the valves from being opened, I would check for signs of inversion....

    #8 cylinder would be the closest cylinder to the water on a log deal...

    Could have tuliped a valve or two also...

    What type of guides were used in the valve job?
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

  4. #3
    "Mad" Member Jet Mad's Avatar
    Join Date
    Dec 2008
    Location
    Cape Town, South Africa
    Posts
    769

    Default

    Quote Originally Posted by GT Jets View Post
    Hydraulicing a cylinder can keep the valves from being opened, I would check for signs of inversion....

    #8 cylinder would be the closest cylinder to the water on a log deal...

    Could have tuliped a valve or two also...

    What type of guides were used in the valve job?
    I am not familiar with the guys engine or what has been done to it before.

    It happened at about 4500 RPM. No water in the oil either.

    Will probably have to do a complete strip down?

    Your theory on hydro lock is a definate possibality?

    Alot of steam came out the Exhaust at idle and it was about 40 degrees Celsuis today here (104 degrees F).

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member hihosilver's Avatar
    Join Date
    Mar 2009
    Location
    bullhead city
    Posts
    500

    Default

    the valve can get hot enough to hang in the guide, done that before

  7. #5
    Senior Member DuaneHTP's Avatar
    Join Date
    Dec 2007
    Location
    Shell Knob, MO
    Posts
    1,379

    Default

    If the guides are not clearanced for a jet boat application, they can seize and gaull when they get hot. Duane HTP

  8. #6
    Senior Member jetboatperformance's Avatar
    Join Date
    Dec 2007
    Location
    Atascadero Calif
    Posts
    7,463

    Default

    Quote Originally Posted by DuaneHTP View Post
    If the guides are not clearanced for a jet boat application, they can seize and gaull when they get hot. Duane HTP
    X's 2 or really old "varnishy fuel" as well (seen this )

+ 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