Model A engine oil filler tube

M

mbaughman

Junior Member
How is the Model A engine oil filler/ breather tube held in place? I am thinking of ordering a tube with baffles to help slow down some of the mess.
 
It is just pressed in, originals had baffles, although Ford changed the baffle design several times. :)
 
You might try using one of the flexible breather pipes that direct the fumes and oil down and out. I usually put the flex tubes into one of the rear engine mount holes.
I recently put a B oil breather and cap which is of large diameter and it too helps, although they are scarce and not readily available.
Larry
 
Looks like mine has baffles, but maybe they don’t work as well as they could, did the later design changes help? May have to do the tube breather. Just hate trying to explain the “oil leak”.
 
We put a Model-B tube on my grandson's 30 Tudor that was blowing oil out the tube. It corrected the problem. The one it replaced was an early 28 that is not baffled well. Sammy at Arizona Model A has them.

Tom Endy
 
Tom Endy said:
We put a Model-B tube on my grandson's 30 Tudor that was blowing oil out the tube. It corrected the problem. The one it replaced was an early 28 that is not baffled well. Sammy at Arizona Model A has them.

Tom Endy
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Tom
As I said in post 3 above I put one on a customers car. I concur that it did the job . I believe ford use them with a larger diameter for the very reason that there was excessive blow by with the B engine and the A was somewhat marginal as evidenced that they kept making changes to the tune to reduce the problem.
I’m kind of surprised no one had repopped the B oil breather.although I can understand why. Thanks for the tip of sourcing through your contact . Appreciate it.
Larry Shepard
 
Check the vendors websites; some may still have a B style repro pipe for $$. Not sure about a scrubber unless designed for such use. Some pieces could fall off and perhaps get sucked back into the oil pan.
 
duke36 said:
Check the vendors websites; some may still have a B style repro pipe for $$. Not sure about a scrubber unless designed for such use. Some pieces could fall off and perhaps get sucked back into the oil pan.
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Most of the Model A suppliers are currently out of stock for the reproduction 32 breather pipes. As reported above, Sammy at Arizona Model A has some originals. Berts in Denver may also have some.

I agree it is not a good idea to place things like a Brillo pad in the breather cap as it restricts the flow of air through the crank case and the labyrinth rear seal depends on that air flow to not leak.

We had a guy bring a car over after he, not knowing any better, had put a solid cap on the breather tube. It was pouring oil out the rear main like an open spigot. We thought at first the babbitt had fallen out of the rear main bearing or the oil return tube on the bearing cap had fallen out. After much investigation without finding the cause, we discovered the solid cap. The leak completely stopped after we removed the solid cap.

Tom Endy
 
duke36 said:
Check the vendors websites; some may still have a B style repro pipe for $$. Not sure about a scrubber unless designed for such use. Some pieces could fall off and perhaps get sucked back into the oil pan.
Click to expand...

Perhaps with a metal scrubber, not with plastic.
 
I have an oversized oil filler tube that fits a Model A but don't have the cap for it. Would that be the Model B filler tube mentioned here?
 
I drilled and tapped a 1/2 inch, 90* brass fitting in the upper rear of the valve cover. Helps relieve pressure and maybe adds a little air circulation. No splash over from the valve chamber at all. Easy to do.
 
mcgarrett said:
I have an oversized oil filler tube that fits a Model A but don't have the cap for it. Would that be the Model B filler tube mentioned here?
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Most likely it is. The Model B oil filler caps seem to be hard to find compared to the number of filler tubes out there.
 
The baffles are a must have to keep oil from escaping the crankcase. Check this out:
 

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The engine oil level is a factor in how much oil is expelled out the breather, I got to watch the results of the oil level being a little above the top of the “F” on my Smiths compressor, it was going to work for 8 hours that day.
It proceeded to spit oil droplets rapidly in the beginning, then it slowed, by lunch time no obvious oil was coming out, checking the oil level it was slightly below the bottom of the “F” and by the end of the day the oil level was still near the F
This engine was built specifically for my Smiths compressor using all used parts, the center pistons I put in the other way because the load is on the compression stroke, it was bored .027 oversized to fit the used pistons and rings, hand scraped in a .009 undersize crankshaft into worn .020 undersize babbitt,All the exterior parts cosmetically unfit for restoration .
The model A engine is quite capable of expelling excess liquid
 
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