How big should the hole be and where exactly should the hole be?? Thanks.

 

If this is a street car I wouldnt reccomend doing this, if not drill 3/8 holes in the bottom of the tray on the side that faces the pistons so the oil will drain out easier.

 

Why do you say dont do on a street car??? Car is street/strip.

 

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.

 

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.

 

i thought i read that it was 2 1/2 holes on one side this way each lifter has a drain hole

 

That is what I did.

 

i did 3/8 holes toward the top. I left some room for some oil to sit so lifters would still have enough oil.

 

Does anyone have a picture of this, I wanna make sure I do it right, Thanks

 

how is this beneficial again?

 

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 !!!

 

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.

 

O.K. I'll drill it. Just to be sure again how big?? and on the bottom correct??

 

https://ls1tech.com/forums/showpost....3&postcount=14

 

I did it with my LS1 and have not noticed any problems or noise because of it.

 

Thanks guy's !!

 

Well, there's just a little bit of oil collecting in the lifter trays. Nevertheless, I would think that pooling oil should be prevented, oil not only lubricates, it also carries heat away and I imagine the lifters are a hot spot.

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."