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Old 11-05-2010, 01:43 PM
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4.0 L Valves

I have a 1991 YJ with a 4.0L six cylinder. Does anyone know if the valves are adjustable?

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Old 11-05-2010, 05:11 PM   #2
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They are hydraulic, no adjustment, but rockers must be torqued to specific ftlbs. If you have a few loud ones, check your rockers for wear, might have a dry lifter also
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