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  1. #1
    Shadowing1985v
    Guest

    Default Should rocker arms be loose

    i took my valve covers off, and most my arms were lose

    i coudl sit there and tap them

    so me and my dad unloosen all fo them and found top dead center in each cyclinder and fixed it



    my question is this

    how much of a performace issue is this,, could this of game me loss of power

  2. #2
    Member
    Join Date
    Jan 2001
    Location
    Enschede, The Netherlands
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    646
    Corvette(s)
    1982 Twin Turbocharged Red/Black

    Default

    For sure, it reduces valve lift by the amount of slack it has to take up.

    Marck

  3. #3
    Shadowing1985v
    Guest

    Default kewl

    so i should be excited then

    when i get it back together tomorrow

  4. #4
    Member
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    Jan 2001
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    Enschede, The Netherlands
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    Corvette(s)
    1982 Twin Turbocharged Red/Black

    Default

    You may or may not notice it. Depends on how many were loose and by how much.

    Marck

  5. #5
    Registered User 69MyWay's Avatar
    Join Date
    Jul 2001
    Location
    Auburndale, Florida
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    6,207
    Corvette(s)
    1969 Killer Shark

    Default

    Hey Shadow,

    This all depends. Seems to me you mentioned before you had some kind of a noise in the engine.

    The stock style rockers really should not just get loose. You might have very worn rockers. You should have compared the tips where they hold the valve and push rod to see if they are mashed out.

    A new set of stock rockers is cheap. I had an S-10 that just wore a hole through the pushrod side and was making all kinds of noise, then started skipping on that one cylinder. A new set of rockers and pushrods, and she ran another 40,000 quiet smooth miles.

    I hope you guys rotated the engine, and set the valves according to specs, and did not just tighten them down until they appeared to be tight.

    If you pull a valvecover, except for those valves that are open, the other rockers will be loose with the engine turned off and sitting still. (factor of hydraulic lifters).


    Let us know.

  6. #6
    Vettelt193's Avatar
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    Jun 2002
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    Tallahassee, FL
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    2,777
    Corvette(s)
    none right now :(

    Default

    from what I rember, shadowing has over 200k on his car... i agree that worn out rockers could be the case... What kind of rockers do you have though? are they the factory stamped rockers? or rollers? a new set may be in order if they are the factory originals

  7. #7
    Shadowing1985v
    Guest

    Default i had one off complety and it didn't look worn

    and like 70 percent of them were loose

    and yeah i found top dead center on all pistons before tightening them


    i will know today
    i use silcone instead of gasket
    and it does way better

    in fact some factories are starting to just use silcone
    i think the noise was caused from my valve cover being on back wards cuas ei put on backwards accident
    i have it all back together now almost and it looks really good

    i wish i had a digital camera to show u guy's what my engine looked before i painted it then after...

    if i buy rocker arms i will spend the little extra and buy those magnum ones,, 20 horse power increas, hehe,,


    thanks for your imput i will tell u guy's whats going on,, when i get it back to running today

  8. #8
    Member
    Join Date
    Apr 2002
    Location
    Livonia, Mi, USA
    Posts
    122
    Corvette(s)
    96 LT4 Polo Green Coupe

    Default I think you gotta....

    Check for clearences on the covers. I beleave you need the gasket....

  9. #9
    Shadowing1985v
    Guest

    Default yeah

    somoene else said that



    u think they could be hitting the top of m valve cover

    well anyways i got myengine back together

    it was idleing really bad now
    but i think its out of time still

    but anyways, i started my car
    it idles between 49 and 65
    once it setts its idling point


    then i detatch my air control meter under my tps sensor
    and the thing idles perfectly at 1300 rpms

    then i shut the ngine off and put it back on and back tothe same thing again,,, does this mean something???

    i took it down the road, and the thing was like starving for gas or something,, not really that just the gas pedal did nothing hardly was barly accerating.

    im going to have my dad look at it tomrorow,, i think the noise in my valve covers have stoped, but its hard to hear when the thing is idling really bad, i think the D moved last time i had it running, might not of tighten it down good enough.. after i timed it,, i have this noise coming from my D "distrubator" i think my rotor is a little loose im goin to open up the cap and look at it in a few minutes. also i notice that the pully that tightens and loosens my belt is moving up and down while the enign eis running. should it do this?

  10. #10
    Registered User 69MyWay's Avatar
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    Jul 2001
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    Auburndale, Florida
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    6,207
    Corvette(s)
    1969 Killer Shark

    Default

    Sounds like you have your rockers too tight now.

  11. #11
    Shadowing1985v
    Guest

    Default really

    i just snuged them where the rocker wouldn't sit there and tap

  12. #12
    Shadowing1985v
    Guest

    Default i do hear some really faint noises on each side of the enigne

    maybe they are hitting the top of my valve cover

    but i think there is tons of clearnance

    those rubber gaskets arn't that thick

    and i put the blue silcone on there pretty thick

  13. #13
    rrubel's Avatar
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    Oct 2001
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    Glen Burnie, MD, USA
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    Corvette(s)
    1986 Bright Red Coupe

    Default

    Yeah, but...

    The gaskets don't compress much. The silicone does. You may have put a lot on, but unless you let it dry completely before installing the cover, you probably squeezed a bunch out.
    [RICHR]

  14. #14
    Shadowing1985v
    Guest

    Default sigh

    i guess im going to take my covers off again tomorrow

    sand blast them and paint them and put the rubber gasket in it



    my dads friend told my dad a better way to adjust the valves

    he said cover your intake with carboard so oil done'st touch it

    and adjust them while hte engine is running.. to look at them move around

    or something like that

  15. #15
    rrubel's Avatar
    Join Date
    Oct 2001
    Location
    Glen Burnie, MD, USA
    Posts
    2,423
    Corvette(s)
    1986 Bright Red Coupe

    Default

    If you have a friend who's a mechanic, he might have the special open valve covers that people use for adjusting SBC rockers. Essentially, it's a pair of valve covers with the centers removed and the edges tapered a bit towards the middle. They keep most of the oil in place when you're adjusting the arms with the engine running.

    So here's my dumb question of the day - when adjusting the rocker arms with the engine off, and you are turning the engine to find TDC for each cylinder, do you:

    a. Remove the serpentine belt so that you just have to turn the crank pulley? and
    b. disconnect the spark plugs so that your car doesn't compression start?

    These are probably elementary things that everyone knows, but as I'm about to replace the arms and DON'T know, I figured I'd ask...

    TIA
    [RICHR]

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