S2000 Under The Hood S2000 Technical and Mechanical discussions.

valve noise... possible tap

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Old 11-11-2008, 11:01 AM
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Ask a local who has done a valve adjustment before to help in checking the clearances. Those just sound way out of spec.
Old 11-11-2008, 04:17 PM
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That's kind of what my car sounds like at idle.
Old 11-22-2008, 08:51 PM
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I might be getting in late with this, but: With a cold motor, put the intakes at .009" and the exhausts at .011". There should be slight drag at these numbers. These numbers are at the middle of spec (in=.008-.010", ex=.010-.012"). Be careful about crank rotation, make it exact. As a test before buttoning up, rotate the crank one time and check that .013" should be a no-go for exhausts and .011" should be no-go for intakes. No-go means that that thickness will not fit at all.
Old 12-01-2008, 05:17 PM
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so the other day i decided to do compression test... the front 2 cyl were between 170 and 180 and the back 2 were around 210 .. which isnt good at all...but im like 95 percent sure its not a head gasket problem... no fluid loss and blow pass threw the rad...hopefully the prob is just the valves and not the piston rings.. i mean its not that far off.. but its not within spec... so im not a happy camper right now.. and it is running a little rough at idle... most likely due to the compression differences
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