S2000 Under The Hood S2000 Technical and Mechanical discussions.

Adjust Those VALVES at 15K mi- Here's why-

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Old 07-25-2002, 06:52 AM
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UL, I've seen Honda valve cover gaskets (and spark plug donuts) that started leaking around 60-70k miles. Not sure if it has to do with whether the valve cover is removed or how tight it is installed, but I'd recommend replacing the gasket with the 60k mile valve adjustment at a minimum. For as often as I check mine I don't bother with the gasket, but for most people, that 60k (second?) valve adjustment it might be a good idea.
Old 07-25-2002, 07:03 AM
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Don't you think that age would play more of a role in the life of the gaskets? I'm sure the gaskets would last at least a few years regardless of mileage.
Old 07-25-2002, 07:06 AM
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They both play a role- mileage as much so since it represents thermal cycles. I'd say 60 or 70k or 5 or 6 years before they typically start to leak.
Old 07-25-2002, 07:07 AM
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[QUOTE]Originally posted by ultimate lurker
[B]I don't know why you'd replace the gaskets.
Old 07-25-2002, 07:21 AM
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[QUOTE]Originally posted by gernby
[B]S2K2GO!!!,

Your valve clearances look like they were pretty good before you adjusted them (only 3 valves out of spec), especially considering the mileage.
Old 07-25-2002, 07:26 AM
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[QUOTE]Originally posted by gernby
[B]Don't you think that age would play more of a role in the life of the gaskets?
Old 07-25-2002, 07:35 AM
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Originally posted by S2K2GO!!!


Wow! I would have thought it pre-mature to check the valves so early, but it sounds like you saved yourself from several burnt valves and a lot of grief. After reading your post, I would take a brand new S2K directly home and check the clearances. The rough idle indicates that you had valves that were not making full contact!
I don't think I was having a problem getting full contact at idle, since that would cause more noticeable side effects at higher RPMs. I think I was getting a rough idle due to the earlier / longer / higher lift, and possibly because of irregular airflow in the cylinders, since the valves weren't "synchronized". I didn't notice any change in performance at all. I tested the compression on each cylinder, and they were all above 220 PSI before and after the adjustment.
Old 07-25-2002, 07:40 AM
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Originally posted by S2K2GO!!!


Yes, but you will never get that bullet-proof seal of a brand new gasket when re-installing old ones, especially the spark-plug well gaskets which obtain their seal by elastically squeezing the tubes like a rubber band.
If the gasket were having to block pressurized oil, I would agree, but I think as long as the rubber is soft and flexible, it will withstand "splashing" oil just fine.

I replaced my gaskets only once in the 140K miles (and 8 or 9 valve adjustments) that I had my '91 Integra, and that was only because I was tired of looking at the new one sitting on my shelf.

I think it is definitely a good idea to have a new set of gaskets on hand, just in case, but I would not replace a gasket that showed no signs of hardening or cracking.
Old 07-25-2002, 09:38 AM
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I took mine to the dealer because of rough idle and hesitations in higher RPMs. The car had 45K mi at this point. The valves needed adjusting. Several intake and exhaust valves were out of spec.
I hope that there is no permanent damage. I agree that this should be checked earlier during the 15k checkup.

btw,
Charges came to $175 with labor and gasket. I have never done a valve adjustment but should probably learn.
Old 07-25-2002, 10:51 AM
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Originally posted by S2.001K
Charges came to $175 with labor and gasket.

Damn, I hope that included a reach around!

When I grow up, I'm going into the valve adjustment business!


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