What could cause this?
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What could cause this?

  1. #1
    Glendale Arizona Squirtcha?'s Avatar
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    Default What could cause this?

    O.k. as a prelude I'll say I'm no motor guy. I have managed to keep
    my BBF running all this time, but probably just because It's been oil
    and spark plug changes primarily.

    Last time at the river I made a pass probably just 1/8 mile at WOT.
    I could tell something wasn't right and it sounded like it was running
    on 7 cylinders. No back firing or anything, but definitely not hitting on
    all 8. Managed to limp it back to the trailer and didn't touch it again
    till I got it home. Pulled the plugs and all 8 are black and fuel fouled.
    Even after 3 days of sitting you could still smell fuel on them real strong.

    I pulled a cold compression check and all cylinders came back at 165
    psi which is about what they've been since the motor was built 7+
    years ago. It took a while for the readings to come up, but again......
    the motor hadn't been started and was cold.

    Pulled the oil filter and cut it open and found no metal in the pleats.
    Just a few little pieces of silicone from the valve covers. No metal at
    all. I had just changed oil and filter and only run it twice since then.

    I pulled the rocker covers and checked the play on all the rockers. It's
    a flat tappet hydraulic cam and I know there's going to be a little play,
    but it seemed excessive. Again no motorhead by any means, but I can
    follow instructions (I think) and went about adjusting the valves.

    Possibly first mistake I did it cold. Here's the method used.

    Hydraulic Valve Adjustment


    Pick a cylinder.
    Bump the motor until the Exhaust valve starts up. Intake is now on
    base circle. Loosen the intake lock nut.

    WAIT a minute or so, to let the plunger relax. Twirl intake pushrod
    between thumb and forefinger (hold gently) and tighten the lock nut
    until you feel the pushrod stop turning. This is zero lash.

    Tighten locknut 1/2~3/4 turn. Bump the motor until the Intake is
    almost down. Exhaust is now on base circle. Loosen the exhaust lock
    nut. WAIT a minute or so, to let the plunger relax. Twirl exhaust
    pushrod between thumb and forefinger (hold gently) , etc... Tighten
    locknut 1/2~3/4 turn.


    They were so loose that I found myself having to put a full turn 360
    degrees on the adjuster nuts before I hit zero lash. Although I thought
    this seemed like an awful lot, I kept going until I had them all done.
    I used the 1/2 turn after zero lash as opposed to the 3/4.

    After finishing I noticed that the valve spring retainers were making
    physical contact with the rocker arms. (Don't worry I wasn't stupid
    enough to start it like that). Obviously something is F'd up here.

    I might've screwed up the adjustment, but I don't think so. Photos are
    below. Any ideas what might cause this, or am I just a dumbass? All
    the polylocks ended up being the same depth within the adjuster nuts
    so it's not like I screwed up a cylinder. If I did something wrong, I did
    em all wrong, but once again I don't think that's the case.

    Should I have started it prior to making the adjustments so ensure the
    lifters were all pumped up?

    The only thing I could figure out is that the lifters had bled off and it
    screwed up my adjustments. However I could feel the lifters compress
    and the plungers give way when going through and adjusting them.

    If I did F it up, how would I get back to square one so I can give it another
    go?

    Contact

    Contact

    Poly locks all match

    Oil filter pleats
    Last edited by Squirtcha?; 06-13-2009 at 12:48 PM.

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  3. #2
    Driver 78CoLeBBF's Avatar
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    Default

    every one does that
    Its a FORD thing chevy's arent quick enough to understand

  4. #3
    Glendale Arizona Squirtcha?'s Avatar
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    Default

    Quote Originally Posted by 78CoLeBBF View Post
    every one does that
    If that's a question..............the answer would be yes. Also noticed the the
    rocker trunions seemed to be kind of sloppy. Not sure how much play there
    should be there.

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  6. #4
    Driver 78CoLeBBF's Avatar
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    Default

    might have floated the valves? messed up some clips, maby damaged rockers. your certain they never were like that before? does the valve/ spring have any play in it?
    Its a FORD thing chevy's arent quick enough to understand

  7. #5
    SLOW MEMBER slowboy's Avatar
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    Default

    I am not a ford guy, but I dont think the valves were set correctly. I am assuming your camshaft is a hyd variety. I would start by loosening all of your rocker arms. I would get the engine on TDC number one compression stroke. Number one cylinder should have both vlaves closed. I would adjust them very gingerly untill the roller tip to valve stem contact is zero, then adjust a 1/4 to 1/2 turn more. Turn the engine over by hand 1/4 turn, and follow the firing order untill complete. I think this is the most accurate way to adjust a hyd cam.

    It does make it alot easier if you remove the spark plugs before doing this.

    It sounds to me like you collapsed the lifter a little, I have never been a fan of the spinning of the pushrods.

    Your miss could have just been a fouled spark plug, it does happen.
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  8. #6
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    have those rockers been touching the retainers at all? it looks like they may have been kissing the tops of them. if they have then you may want to check the keepers to see if they have been moving around on the valves and showing signs of wear on the valve tips and keepers. looks to me like you need lash caps on them to give you the proper amount of clearance. my chevy did the same thing they were kissing the retainers and over time they worked the tips of the valves and then i started dropping valves. the tips of the valves would snap off. had to replace all the valves. make sure you have enough clearance between rocker and spring retainers. a set of lash caps is cheap.

  9. #7
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    Default bad gas

    Check your gas real good. Sounds like what Parker Oil did to me.

  10. #8
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    There is a wear/polished pattern on the pushrods. see if you have gone beyond the normal pattern or not. You might have collapsed the lifters durring adjustment due to them slowly bleeding down after 2 weaks. Just an easy check. Personally I like to adjust hyd. when hot & running on a well broken in motor.
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  11. #9
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    Pat had a good thought also about contaminated oil from fuel if that is where he was going with that.
    The government's monetary role is to maintain the integrity of the monetary unit, not participate in fraud

  12. #10
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    If that's a question..............the answer would be yes. Also noticed the the
    rocker trunions seemed to be kind of sloppy. Not sure how much play there
    should be there.
    rocker trunions wear man, its a bearing. just pull em off and check em, if they have more than you're comfortable with, sell em on ebay and replace em you'll be out 75-80bucks tops for fresh rockers, i do that from time to time for friends that's why you'll never see me selling rockers here,lol.

    squirt, go buy ya some zero lash speed pro lifters from summit. they'll make your motor come alive over 5krpms, plus all ya have to do is zero lash the bastards, that's it, no 1/8th turn bullshit. since you're not having to preload a lifter with the 0 lash lifters, your roller contact will look nicer and just maybe you won't be striking the retainer anymore

    i'll look up the lifter and link ya to it, dude there's no ****ing better hyd lifter in a bbf than these, i've made gobs of power in bbf's with em just spend the $$$$$ and trust me on this 1

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  13. #11
    mo balls than $cents$ IMPATIENT 1's Avatar
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  14. #12
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    check the lash after the motor is warm, rocker should not touch retainer.

  15. #13
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    Quote Originally Posted by walrus View Post
    check the lash after the motor is warm, rocker should not touch retainer.
    x2, he needs to do mid-lift method and check those pushrod lengths, after he does the zero lash lifters of course

    Dare to be different, if it turns out great you can claim you planned it that way.

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  16. #14
    Senior Member CK7684's Avatar
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    Default

    But is that what caused the problem?

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