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test the compression in all cylinder bores to rule out the valves or for novice home mech. take the cylinder head in to a machine shop to have a compression test done.

A bent valve will be noisy, each time it is hit by the cam it will bang, the cylinder will not burn fuel and you may even have burning oil.

You will most liklely have a MIL light and a code for emissions like O2 sensor and/or cylinder misfire because of the unburnt fuel making the cat hot, but it could also be an intake valve so you could have backfiring through the intake and rough running for sure.

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โˆ™ 2016-08-18 19:58:43
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โˆ™ 2016-08-19 15:42:41

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Q: How do you know if you have a warped valve?
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