Valve lash recommendation
+ Reply to Thread
Results 1 to 8 of 8

Thread:
Valve lash recommendation

  1. #1
    Member
    Join Date
    Sep 2012
    Posts
    31

    Default Valve lash recommendation

    Hi,
    I have an engine which I Purchased and never got cam specs or card with.
    It has been running very well but time to check the rockers and I am not exactly sure what to set the lash at, Without going to the lengths of pulling the cam and finding out specs.
    Currently I have some up and down readings but 5 cyl are reading .20 and 3cyl at .18 cold, What would be a setting on the safe side all .18 or .20. open spring pressure is 598lbs, Crower enduro rockers 1.6 intake, 1.52 exhaust. Any thoughts?

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,269

    Default

    Quote Originally Posted by Caribbean17 View Post
    Hi,
    I have an engine which I Purchased and never got cam specs or card with.
    It has been running very well but time to check the rockers and I am not exactly sure what to set the lash at, Without going to the lengths of pulling the cam and finding out specs.
    Currently I have some up and down readings but 5 cyl are reading .20 and 3cyl at .18 cold, What would be a setting on the safe side all .18 or .20. open spring pressure is 598lbs, Crower enduro rockers 1.6 intake, 1.52 exhaust. Any thoughts?
    Tighter is safer.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  4. #3
    Senior Member jimclauss's Avatar
    Join Date
    Jan 2011
    Location
    Mickleton, New Jersey
    Posts
    1,622

    Default

    Quote Originally Posted by Caribbean17 View Post
    Hi,
    I have an engine which I Purchased and never got cam specs or card with.
    It has been running very well but time to check the rockers and I am not exactly sure what to set the lash at, Without going to the lengths of pulling the cam and finding out specs.
    Currently I have some up and down readings but 5 cyl are reading .20 and 3cyl at .18 cold, What would be a setting on the safe side all .18 or .20. open spring pressure is 598lbs, Crower enduro rockers 1.6 intake, 1.52 exhaust. Any thoughts?
    I don't think you mean .20 or .18 maybe set them at .019

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Member
    Join Date
    Sep 2012
    Posts
    31

    Default

    Yes sorry missed a zero in there .018- .020

  7. #5
    Senior Member
    Join Date
    Dec 2007
    Location
    Newbury Park, Ca/Mohave Valley, Az
    Posts
    8,168

    Default Top/bottom...?

    Quote Originally Posted by Caribbean17 View Post
    Yes sorry missed a zero in there .018- .020
    Old school rule, "tighter is better up top, loose is better down low".... A heavy load from a standing start likes 'um looser, to wind it tight up top, tighter... The difference means very little to "lift", but you can add/subtract a little duration...
    Ray
    LOUD BOATS SAVE LIVES

  8. #6
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Quote Originally Posted by Moneypit View Post
    Old school rule, "tighter is better up top, loose is better down low".... A heavy load from a standing start likes 'um looser, to wind it tight up top, tighter... The difference means very little to "lift", but you can add/subtract a little duration...
    Ray
    You can also destroy lifters in a heartbeat with them too loose. Specially a tight lash roller. Many of the old flat tappet games don't go over well with some rollers.



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

  9. #7
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,269

    Default

    Quote Originally Posted by gn7 View Post
    You can also destroy lifters in a heartbeat with them too loose. Specially a tight lash roller. Many of the old flat tappet games don't go over well with some rollers.

    OP...in your case either .018 or .020 will be safe. If you have aluminum heads you can add .006" and that will be your hot lash, so you're looking at .024 - .026 hot but given the choice between the two I'd start with the tighter.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  10. #8
    Senior Member
    Join Date
    Dec 2007
    Location
    Newbury Park, Ca/Mohave Valley, Az
    Posts
    8,168

    Default Limits...

    Quote Originally Posted by gn7 View Post
    You can also destroy lifters in a heartbeat with them too loose. Specially a tight lash roller. Many of the old flat tappet games don't go over well with some rollers.
    Of course Bob... There are limits in both directions, and anything tighter than what he had should also dictate a P/V check through the overlap sequence... A few added degrees on a steep ramp may get undesirable results...
    Ray
    LOUD BOATS SAVE LIVES

+ 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