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  #1 (permalink)  
Old 08-16-2004, 10:43 AM
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Question External oil drains?

Has anyone done this?

I still can't comprehend the fact that the FE has no oil return drains in the heads. What were the designers thinking!

In it's current form, I'd guess that the oil to the rockers just fills up the head under the valve covers, until it overflows back through the pushrod holes. If you run the factory oil drain pans, I would think that helps collect a little of it, but it still have to flow uphill.

So I was thinking about tapping the rear of the head at the bottom of the valve cover area, for some drail lines back to the oil pan. Has anyone done this? I'd think it would be a great idea, especially for a high rpm FE.
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Old 08-16-2004, 12:31 PM
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Sal, it depends. That extra oil can keep the springs cooler on the race track. If there are drops in oil presure at corners, the pan is dry. You can add drain backs which is what I did on my 351 heads at the rear. Drain backs and an accusump are cheaper than the best way which is dry sump. Good luck, Scott.
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Old 08-16-2004, 03:58 PM
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Hi Sal , There are two holes , one in the front and one in the back , plus they put restrictors in to resrict the amount of oil going to the rockers . Let me know if you want me to stop by , I would pull a valve cover off ,show you the dove set up I got from George A. Guessford .
Sal let me know if you still may want that bell housing / plate .
I was on you dyno with the green car , John Martin
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Old 08-16-2004, 04:33 PM
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Hey John, good to hear from you. Maybe the side oiler has return drains. I have a 428 CJ block here on my stand an there are no oil return holes in the deck of the block, nor are there any return passages if you look inside the block. As for the bell, I may still be interested in it.
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Old 08-17-2004, 11:13 AM
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Sal,
The oil drains in the front and rear of the heads intersect with the outer upper head bolts and the oil passes past the bolts and into the lifter valley.
Not the best method, but it works OK.
Once you see the heads, you'll see what I mean.
--Mike
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Old 08-17-2004, 07:17 PM
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I have two retun holes in my 427 (front and back) as did my 428 before the 427.
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Old 08-17-2004, 07:46 PM
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Well, there are no oil drain holes in the deck of the block. If there are drains at the top of the head, they are still useless. That means the oil still has to fill the head under the valve cover in order to get back into the crankcase, via the lifter valley. Other Ford V8s have drain holes in the bottom of the head with oil return passages through the sides of the block.

Think about this... if you poured oil into the top of the valve cover, and it didn't return into the block until it filled up and reached the upper part of the head, how much oil do you think would be under that valve cover? I'd say WELL over a quart, maybe even close to two. That means at any given time the motor is running, there is at least 3 quarts of oil in the heads. If you had a 7 quart system, you'd have 3 quarts in the head, 1 in the filter, that leaves you with 3 quarts in the pan to feed the motor next time you rev it to 6-7 grand. Sorry, I don't like that idea one bit .
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See my car at CSXinfo.net here >> CSX 4241

Last edited by Power Surge; 08-17-2004 at 07:58 PM..
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Old 08-26-2004, 08:19 AM
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Sal

Both of my FEs have oil return or drain back holes. One FE is a 406 the other is a 427 co. Check the pics.

The hole is the dark spot just to the left of the valve spring.
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Old 08-26-2004, 08:22 AM
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This is the hole in the other end of the head.




Hope this helps!
Paul
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