Re: Oil pressure at idle

Posted by Owen_Dyneto On 2019/8/3 18:24:11

Your oil pressures sound completely normal. I believe typical minimum oil pressure values are stated in the owner's manual and you should buy one if you haven't, and read thru it. For my '34 Eight, same basic engine and oiling system as yours, hot idling pressure is 3 (or is it 5?) psi, and 35 psi at roadspeed.

Set your relief valve to give at most, a maximum of 55, its important as excessive pressure can damage the aluminum crankcase casting or even split old filters open at the seam.

DO NOT mill or surface-grind your cylinder head unless absolutely necessary! If there are no surface defects (for example, corrosion pitting around water passage openings), simply being warped by ten thousandths or so is NOT a reason to resurface.