The Ford Barn

German guy · 06-06-2025, 01:30 AM

My 30 Tudor has always dripped a bit engine oil...not much....maybe a drop every day or two and no obvious source is apparent. I installed a 6:1 head and it now leaks a LOT more. It seems that a fine mist of oil is coating the bottom of the oil pan as well as the underside of the transmission and eventually amounts to enough to drip. After a few days of standing cold the dripping is much less....almost stops Seems that heating up and thinning the oil when driving increases the mist and dripping. Can the increased compression exacerbate a slow leak at the oil pan seal? I inherited the car with an already rebuilt engine and it looks like silicon was used in lieu of gaskets across the board..including the oil pan....thin bead of red silicon around the joining edges at the pan and block. That bead is always slightly damp with oil...never enough to cause a noticeable drip, but you can always wipe a bit of oil off. Could increased compression force more oil out of that bead?

06-06-2025, 01:30 AM	#1
German guy Senior Member Join Date: Sep 2023 Location: German/French border Posts: 104	HC head increasing oil leak? My 30 Tudor has always dripped a bit engine oil...not much....maybe a drop every day or two and no obvious source is apparent. I installed a 6:1 head and it now leaks a LOT more. It seems that a fine mist of oil is coating the bottom of the oil pan as well as the underside of the transmission and eventually amounts to enough to drip. After a few days of standing cold the dripping is much less....almost stops Seems that heating up and thinning the oil when driving increases the mist and dripping. Can the increased compression exacerbate a slow leak at the oil pan seal? I inherited the car with an already rebuilt engine and it looks like silicon was used in lieu of gaskets across the board..including the oil pan....thin bead of red silicon around the joining edges at the pan and block. That bead is always slightly damp with oil...never enough to cause a noticeable drip, but you can always wipe a bit of oil off. Could increased compression force more oil out of that bead?