Join Date: Aug 2011
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I agree with jjkz24. Since the head is already receiving the oil supply internally, running an external oil feed was not necessary. I doubt it would have an effect on the VTEC operation however, unless you have insufficient crankcase pressure release. Considering that you have twice the oil quantity going to the head it would be beneficial to vent crankcase pressure out the back of the block in addition to the venting it out of the valve cover. Otherwise the oil may be collecting inside the head, unable to drain back to the oil pan. Remember, the oil drain is gravity based and excessive crankcase pressure would be a significant obstruction. Lots of oil in the head means less of it in the oil pan. Too little of oil in the oil pan and the there may not be enough for the oil pump to process. W/o proper oil pressure VTEC won't engage. Although at this point VTEC operation should be the least of your worries if you know what I mean.
Last edited by Built_not_bought; 05-06-2019 at 12:12 PM.