Visit The Dirt Forum for More Information

Author Topic:   Lifter Valley prep
posted December 03, 2003 05:35 PM
I'm just curious, when preparing a block I've seen many guys smooth out and polish the lifter valley. What exactly does this do, bottom line? is there a horsepower gain there?

posted December 03, 2003 06:49 PM
in theory it helps the oil return, in my opinion it's picking fly poop out of pepper, in other words too little return for the effort. Would like to hear other opinions, tho.

DMA Racing
posted December 03, 2003 07:30 PM
it will help oil return to the pan.

posted December 03, 2003 08:20 PM
I paint the valley of mine with electric motor armature paint. Does the same thing, help the oil flow back to the pan, and it's easier than grinding. I also paint the oil areas of the heads, and the cast in the timing chain area.

I think I got the paint from Granger. About $20 per can. Can does several motors.

posted December 03, 2003 08:31 PM
The only reason that it's really done is to eliminate the porous places in the casting . This is done to eliminate any chance of porous casting shedding off and running through the oil system. Of course there are oil shedding benefits , but these are minimal. I would suggest cleaning up the lifter valley , but a mirror finish is a waist of time .


Hendren Racing Engines
Rutherfordton , NC

posted December 03, 2003 10:12 PM
Istock59, uses armature paint it doesnt wear off or move eve!!!!

thats the way to do it. the paint seals any crud that could be in there moving around...

grinding creates more crud.

I just grind the large return holes before it goes to the machine shop. and paint it after with armature paint..

posted December 04, 2003 10:01 AM
The only thing I would do to the lifter valley is install screens in all
the oil return holes. Keeps broken parts
at the top end from finding there way into the bottom end.

posted December 04, 2003 10:10 AM
I cut my oil filter religously, and have never found a speck of orange armature paint. Clean it EXTRA good to remove all oil traces before you paint it and you won't have any problems.

Even when I take parts painted that way to the machineshop, their Jet-wash doesn't even take all the paint off. And we know the chemicals they use are nasty.

I like it from a tear-down standpoint too, it's really easy to clean up during the winter.

Do it or don't do it, it's up to you, there's no performance advantage to it, just makes things "neater"... I know all my motors will have it.

[This message has been edited by istock59 (edited December 04, 2003).]

posted December 04, 2003 11:53 AM
I grind the rear oil return holes to the blueprinted size. Genreally 1/2 - 2/3 of the hole will be covered with casting flash. I'll also run a sanding drum over the rest real quick (like 1 minute per side) to knock off any big flash lines/marks. That's about it.

posted December 04, 2003 04:26 PM
zero youll argue about anything on here!! from bombers to super lates.

the polite thing to do would be to let people state their case and let others decide which way to go, you dont have to try to prove your way over and over. if we want to prove ourselves lets start a thread of what I have acccomplished and start listing our bios.

Istock59 you could get a moroso pre filter screen it sits on top of your filter. that way you can quit cutting your filters. all you have to do it drop the filter and look. they filter to 60 microns. they havent hurt my motors yet in the last 5 years.. I use them all the time, and have caught brg metal on break in etc, saved me a lot of heart aches over the years.

Back to the Archives