Lifter tray drill mod ???
Some people think that the oil in the trays are key to the life of the lifter in a street car. I didnt do this in my motor because I read that on here somewhere. I'll try to post a link.
I didn't do it on mine, just doesn't seem to be a worthwhile mod unless maybe the car is running on a track, not drag strip. We have seen a lot of lifter issues recently, I wouldn't do anything that would jeopardize oiling but that is just me.
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Joined: Jun 2002
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From: Earth
Originally Posted by sickss228
Some people think that the oil in the trays are key to the life of the lifter in a street car. I didnt do this in my motor because I read that on here somewhere. I'll try to post a link.
The oil in the lifter trays is on top of the lifters....and drilling the holes allows only excess oil to drain, with plenty still 'on top".
Besides, how can oil on top of the lifter benefit the life of the lifter? Maybe the article can shed some light on whatever it is I'm missing here.
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So who has done it?? Any problems with lifter noise?? I cant imagine it would. I'm putting this engine back together today. I wanted to get some more info before I did it. If not then I guess it's going back together with no holes !!!
Originally Posted by 2 Stroke Racer
So who has done it?? Any problems with lifter noise?? I cant imagine it would. I'm putting this engine back together today. I wanted to get some more info before I did it. If not then I guess it's going back together with no holes !!!
Originally Posted by Hodge
The tray serves ONE purpose: prevent the lifter from rotating in its bore. The belief that holding oil on top of the lifter is somehow beneficial is incorrect.
But it's such a small amount of oil that collects there. I don't know if drilling is worth much benefit.
From Handzel's book..."A good trick to improve oil control in a hot-rod Gen III V-8 is to drill these 1/2" drain holes in the lower face of the lifter retailer trays above each lifter. On a production engine, having engine oil pooling here is acceptable, but on a high-rpm engine, having oil lying around only costs power and causes the oil to foam and get hot."
