Civic Valves - Normal Pre-Adjustment Spec?

Discussion in 'Civic' started by Frank van Hoof, Oct 27, 2003.

  1. I just adjusted the valves in my 88 Civic. I found that they were all about
    2-3 thou UNDER spec. EG .004 to .006 on intake, .006 to .008 on exhaust.
    Is this normal - for the valves to get 'tighter' as they wear in? So, I set
    intakes to .008 and exhaust to .011 and started her up. Sounds a little
    clakkety at startup, but then gets quiet as it warms up. Seems peppier too,
    but then I also found spark plugs were way overgapped, and fixed that, and
    took some crud off rotor and distributor cap contacts too, so could have had
    weak sparks.

    Do you wrenchers out there find valves usually tighten up? Also, are your
    valves dead quiet even cold after a good valve adjustment?

    Frank van Hoof, Oct 27, 2003
  2. Frank van Hoof

    Jafir Elkurd Guest

    In my experience, the intakes usually get a little loose and the exhaust
    usually get a little tight, but anything can happen. There are some people
    who have even claimed that their engines went 200,000 miles and never needed
    any adjustment.... maybe they got tight and the loose again ;-).
    As far as noise... any car with adjustable valve lash will be a little
    noisy... but I would think it should be quiet enough that you don't notice
    it when warmed up at idle.
    Jafir Elkurd, Oct 27, 2003
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