Re: LT5 technical problem
There are no restrictors in the oil ways to the valve gear. Running the engine with the cam covers off (not recommend) with just the retaining caps in place will allow the camshaft to lift away from the head slightly as the retaining caps are a bigger bore the the camshaft line bore. This may let the valves down on to the seats if the tappets have become jacked up i.e. solid.
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