Milt,
Without the nozzles the cam lobes and tappet faces are lubricated by splash lubrication. With the nozzles the same surfaces have pressure spray at them. At start and shut down, with the nozzles you would have oil spaying on these parts and without you rely solely on splash. With a proiler and the nozzles installed, when the preoiler is engaged, the lobes of the cam and tappet faces have oil squirting directly on them. Without the nozzles and with a preoiler, no oil is squirted at the lobes of the cam or tappet faces directly and only oil that bleeds out of the cam bearing bores is any where in the vacinity of these parts and at that time there is no splash lubrication, as the engine isn't turning. So I think with the nozzles you will have fairly positive lubrication to the cam lobes and tappet faces whenever the engine is running and whenever it is being preoiled. But without them, you rely entirely on splash lubrication even when preoiling. This also holds true at start and shut down. During start, as soon as you have oil pressure the lobes and tappets faces have oil squirting on them vs. slinging cold thick oil onto the same parts. On shut down, you have oil being spayed on the parts vs. hot thin oil being slung on the cam lobes or tappet faces with the engine at very low rpms.
May be overkill to some? but I think still worth consideration.
Good Luck,
Mahlon
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