Neutral
Sean,
If you can run the engine with the rocker cover off, then get a 5-10 thou feeler gauge and slip it between each rocker/valve stem. If you hear a difference, that's the one.
Does it have adjustable valve train, and if so have they been adjusted correctly? You may find one is backing off.
__________________
Gary
Gold Certified Holden Technician
Last edited by Gaz64; 04-28-2015 at 11:14 PM..
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