'46 59 engine, Baffle assy in lifter valley

OLD AS I

OLD AS I

Senior Member
Reassembling engine and looking at the Green Bible I see a clip type looking thingey part number 48-6524 described as a "Baffle ***'y (valve chamber oil) 2 req'd", wasn't in there when I took the engine apart. What do they do and are they really required , how do they go in and exactly where ?
 
They clip on to the oil galley tube, and yes you need them, they keep the oil splash down at the valves, burns less oil.
 
RalphM, thanks for your comment, any idea where Id find a supplier, never seen them in any catalogs etc
 
I'm sure someone on here with one of those cracked blocks will have a set lying around. I may have an extra set, but I'm not going to be home for another week.
 
I still fail to see how they do or did anything at all. I removed them during a rebuild of my 21-studder 6 years ago. Hmmm---maybe that's why I lose about a quart of 5W-20 synblend between 2K changes. 8^) Jack E/NJ
 
Check with Mac VanPelt. He may have a set of NOS or good used. I would definitely put them in. Henry had those in there for a good reason. If you can't find a set, I know I have some used ones stashed, like others have mentioned, that came out of trashed engines.
 
Me too, The reason is:There are holes between the valve valley and the crankcase. This allows an oil spray to enter the valley to lubricate the valve guides. However, left open, too much oil will enter the valley and under hi vacuum condition's draw more oil up the valve guides. That's why haveing a tight fitting valve stem to guide is important. Most aftermarket guides have too much clearance, so I Knurell them.
 
Nope. I still don't get it. Hi vacuum conditions in the valley of a flathead? I don't think so. If the holes let too much oil enter the valley under any conditions, Henry shoulda made the holes smaller and saved some sheet metal. Anyway, I left 'em out. Am quite satisfied with a quart loss of 5w20 every 2K cuz I think most of it leaks not burns out. Jack E/NJ
 
When you take your foot off the gas to slow down, the intake manifold will have over 20" of vacuum in it. So it will tend to draw in air or anything else it can get a hold of including oil through the guides. You obviously have the best lubricated guides in the world. This doesn't help the rest of the engine.
 
Generally, I have found that the factory engineers knew what they were doing. This is especially true of Ford. If Henry decided they were worth the extra expense, they probably were.
 
Thanks for all the comments and replies here. Anyone have a picture of where these baffles should go or is there a book or catalog that shows them. When I get them might it be a no brainer, like only go in one place ?
 
Ol' Ron said:
When you take your foot off the gas to slow down, the intake manifold will have over 20" of vacuum in it. So it will tend to draw in air or anything else it can get a hold of including oil through the guides. You obviously have the best lubricated guides in the world. This doesn't help the rest of the engine.
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Ron---I sure don't question that a small amount of oil & air tends to get sucked by the guides under in-gear deceleration. As a kid, I used to have much fun leaving a cloud of smoke behind by in-gear decelerating, then accelerating. What I do question is that this small amount could possibly create a truly hi vacuum condition in entire valley compartment. If so, the manifold vacuum leaks would seem to be so massive as to be uncontrollable. I still don't think so.---Jack E/NJ
 
I'd be guessing those are there to limit the crank from throwing hot oil towards the bottom of the intake manifold, specifically where the heat crossover section is located?? They "cover" the 4 oil-return holes in the valley. Leaving them out MAY cause internal "smoking" for sure.

Thanks, Gary in N.Y.

P.S. If you block-off the heat-passage in the intake you probably wouldn't need them but it's much safer to have them where they belong. Same reasoning Chevy's use the tin heat shields riveted to the bottoms of all their intakes from the factory.
 
Jack E/NJ said:
Ron---I sure don't question that a small amount of oil & air tends to get sucked by the guides under in-gear deceleration. As a kid, I used to have much fun leaving a cloud of smoke behind by in-gear decelerating, then accelerating. What I do question is that this small amount could possibly create a truly hi vacuum condition in entire valley compartment. If so, the manifold vacuum leaks would seem to be so massive as to be uncontrollable. I still don't think so.---Jack E/NJ
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Please note: Ol' Ron did NOT say anything about "a truly hi vacuum condition in entire valley compartment"! He merely mentioned "under high vacuum conditions...". Anyone familiar with how an engine operates would immediately figure out that those "high vacuum conditions" exist within the intake tract during closed throttle deceleration.
 
GOSFAST said:
I'd be guessing those are there to limit the crank from throwing hot oil towards the bottom of the intake manifold, specifically where the heat crossover section is located?? They "cover" the 4 oil-return holes in the valley. Leaving them out MAY cause internal "smoking" for sure.

Thanks, Gary in N.Y.

P.S. If you block-off the heat-passage in the intake you probably wouldn't need them but it's much safer to have them where they belong. Same reasoning Chevy's use the tin heat shields riveted to the bottoms of all their intakes from the factory.
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Exactly. Gary, Ol Ron and 40 Deluxe are right.

Not sure what the fuss is, but by choosing to leave them out there could be some oil pulled through the guides.

Not that big of a deal to put them on, but we all make our own choices.
 
Back when the engines didn't have a proper crankcase venting set up. There were customer complaints of the oil smell in the cab under normal use. Oil would vaporize inside the engine and come out the oil fill location then drift about the engine compartment. You can tell the engineers tried a number of things to keep oil vaporization within the engine to a minimum. One of them was the little deflectors. The next was the vent through the front right corner of the oil pan. They couldn't do anything about the eventual blow by from worn piston rings but they did reduce the oil smell in the cab a good bit.
 
One of my baffles
 

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