1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

83 XJ internal engine issues????

Discussion in 'XJ Technical Chat' started by katikyoo, Mar 22, 2010.

  1. katikyoo

    katikyoo New Member

    Messages:
    17
    Likes Received:
    0
    Trophy Points:
    1
    My xj 650 never ran right, cleaned the carbs and went to synce up carbs from vaccum ports and found some compression along with the vaccum. i checked my valve clearances. And from what i can gather here they werent far enough out of spec to hold the intake valve open. Should i pull the head off and check for burnt valve seats?
     
    katikyoo, Mar 22, 2010
    #1
  2. skippy344

    skippy344 Member

    Messages:
    241
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Aggieland, TX
    Let's check the timing first. Gotta make sure the cams are opening and closing at the correct time.
     
    skippy344, Mar 22, 2010
    #2
  3. mlew

    mlew Well-Known Member

    Messages:
    3,090
    Likes Received:
    241
    Trophy Points:
    63
    Location:
    Apex, NC
    Do a compression test before you take anything apart. Let us know what the numbers are.
     
    mlew, Mar 22, 2010
    #3
  4. katikyoo

    katikyoo New Member

    Messages:
    17
    Likes Received:
    0
    Trophy Points:
    1
    I Checked The Valve clearances and compression. Compression was between 30 and 40 for all cylinders. Intake valve clearance was .000, .004, .002, .002
    Exhaust valve clearance was .005, .007, .004, .007
     
    katikyoo, Mar 25, 2010
    #4
  5. katikyoo

    katikyoo New Member

    Messages:
    17
    Likes Received:
    0
    Trophy Points:
    1
    I also checked timing and it is within spec.
     
    katikyoo, Mar 25, 2010
    #5
  6. Robert

    Robert Active Member

    Messages:
    7,479
    Likes Received:
    9
    Trophy Points:
    38
    Location:
    Ventura CA
    Whoa! 30-40 PSI? You have major problems in there. Your clearances are a mess. 0.004-0.006 for intake, 0.006-0.008 for exhaust. You need to get the valve specs within tolerance before your compression test will give you values worth anything.
    Good luck amigo!
     
    Robert, Mar 25, 2010
    #6

Share This Page