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AIRHEAD VALVE ADJUSTMENT with Pics

Discussion in 'XJ DIY How-To Instructions' started by bigfitz52, Jan 6, 2009.

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  1. Craig B

    Craig B Active Member

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    Well thats mature.
    I have owned the bike since 1987.
    What I have stated is FACT.
    Live with it.
     
  2. Craig B

    Craig B Active Member

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    Well thats mature.

    What I have stated is FACT.


    Live with it.

    [​IMG]
     
    Last edited: Apr 28, 2017
  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    That fact is highly unusual. Not impossible, but highly unusual.
     
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  4. Craig B

    Craig B Active Member

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    Maybe unusual but fact none the less.
    Previous question was concerning how long an engine would go.
    My response was to answer his question.
    Perhaps the its the "school of dont fix whats not broken" or the dilegent use of synthetic motor oil.
    Whichever the case those are the specs I measured this afternoon.
     
  5. Paul Howells

    Paul Howells Active Member

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    I read that the synthetic oil will slip the wet clutch. What kind of oil have you been using? You could get a sponsorship with that kind of testimony.
     
  6. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

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    Oh boy--- here we go.... Time to make big bowl of popcorn.
     
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  7. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    I think the conversation needs it's own thread.
     
  8. Craig B

    Craig B Active Member

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    If anyone cares for more information.
    Feel free to send me a PM.
     
  9. MattiThundrrr

    MattiThundrrr Not a guru

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    I'd say at least 300,000km!
     
  10. Carson

    Carson Member

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    I followed the directions on this thread and everything WAS fine. No leaks for a couple weeks. Now my new valve cover gasket is leaking from the semi circle cam shaft parts on the right side of the engine (brake side). I got the gasket off eBay so I'm hoping it's a bad gasket? Does it make sense that it would work for a bit and then start randomly leaking?
     
  11. Jasonh

    Jasonh '81 XJ750 Seca

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    I'm running semi-synthetic. My $.02 is engine is quieter and smoother than with non synthetic and changes gears better. I do notice a little more slip on the clutch when starting, but makes for a smoother start. My clutch plates are in last 1/4 of life so I'm not aggressive off the line. I was told not to use full synthetic unless you've got a tight, rebuilt engine and fairly fresh clutch.
     
  12. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Please note the title of the thread before posting. This is not an oil discussion.
     
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  13. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    You may have missed the comments about using a thin smear of RTV on the half-moon seals
     
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  14. Stumplifter

    Stumplifter Well-Known Member

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    The RTV smear as Kmoe suggested. Also - I do not use a torque wrench on my valve cover (gasp! :eek:). Mine is an 81 XJ650 Maxim - no donuts - so I just snug those screws down to that 'just right' 3rd and 4th finger torque setting. I also torque in a symmetrical fashion from the center to the outside corners. If a seep is recognized I will 're-torque' a series of screws towards the seep area.

    Be cautious as over torqueing will strip the threads in the aluminum head. Even properly torque settings can stripped compromised threads . . . been there done that - hate it! (fortunately have not done it on my XJ).
     
  15. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The bolts have a shoulder that rests on the head. Over-tightening can do more than strip threads; it can crack the head. Fortunately the torque spec just happens to be finger tight.
     
  16. Wintersdark

    Wintersdark Well-Known Member

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    My Maxim's got a stripped valve cover bolt hole, front left bolt. Noticed it was a bit higher than the rest, and sure enough... It comes right out and the holes stripped. I just so happen to have a spare head, but I'd rather not replace the whole head as that seems like a terribly large amount of work... There a good way to fix that? I've never had to deal with that before. It's not leaking as it is, so it's a little lower on the priority list, but it's obviously going to have to be dealt with.
     
  17. Craig B

    Craig B Active Member

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    Helicoil.
    [​IMG]
     
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  18. Baxter

    Baxter New Member

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    A very old but, very good post.
    Does anyone have these pictures saved? I am doing mine now but the pictures really do tell a thousand words.
    Thanks
     
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  19. Dstrong77

    Dstrong77 Member

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    On most of the pics in this forum I am seeing a Photobucket 3rd party image instead of the actual photos. Anyone else?
     
  20. XJ550H

    XJ550H Well-Known Member Premium Member

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    photo bucket now requires payment to post photo links on comercial sites
     
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