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08-08-2016, 07:09 PM | #1 |
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oil filler tube and cap
Hi all, I was wondering if any one ever had a problem with oil splattering out of the cap over normal driving and getting on the engine? Are there baffles in the tube to prevent that? The man I got my '30 Tudor sedan from had brillo pad stuffed in the cap to prevent the oil from coming out of the cap when driving and it works. I my self really don't want a brill-o pad in there but then I don't want an oily looking engine either. I guess I could try a new cap to see if that works. Jim
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08-08-2016, 07:16 PM | #2 |
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Re: oil filler tube and cap
You can buy an accessory road draft tube that attaches to the top of the filler pipe.
It ducts the fumes away from the engine compartment and HELPS eliminate the mess. It has a spring loaded cap to allow you to add oil. I got mine from Mikes Affordable A parts in Georgia. |
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08-08-2016, 07:23 PM | #3 |
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Re: oil filler tube and cap
Thanks Bill. I'll have to look it up.
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08-08-2016, 07:26 PM | #4 |
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Re: oil filler tube and cap
Yes there are baffles in the tube to prevent oil from splattering out. However, I have seen many tubes with the baffles removed or bent so that they are ineffective. Check that first.
Blocking the proper ventilation of the tube can cause pressure to build in the pan resulting in oil being forced out the rear main. If all checks out OK, try slipping a cotton sock over the pipe to prevent the splashing.
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08-08-2016, 07:42 PM | #5 |
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Re: oil filler tube and cap
I never thought about the cotton socks! thanks Mag
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08-08-2016, 09:01 PM | #6 |
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Re: oil filler tube and cap
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08-08-2016, 09:02 PM | #7 | |
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Re: oil filler tube and cap
Quote:
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08-08-2016, 09:37 PM | #8 |
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Re: oil filler tube and cap
Never never never put anything in the filler tube. You might want to try dumping your oil and refilling the crankcase with 4 quarts and see how this works. You might be running with too much oil causing the excess oil to come out the filler tube.
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08-08-2016, 09:51 PM | #9 |
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Re: oil filler tube and cap
It is not a good idea to stuff a briilo pad in the filler tube as it is also a vent pipe to let the engine crank case vent. Blocking the vent pipe will create pressure that will force oil out over the labrance seal at the rear main and you are liable to have a giant oil leak.
Tom Endy |
08-09-2016, 02:50 AM | #10 |
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Re: oil filler tube and cap
I am with CT Jack, I welded two MA filler tubes together one on top of the other, no oil spray since.
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08-09-2016, 09:30 AM | #11 |
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Re: oil filler tube and cap
Fumaze to the rescue
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10-01-2016, 11:36 PM | #12 |
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Re: oil filler tube and cap
Ive used the stainless steel scrubbie pad by brillo. Very strong drill bit shavings meshed together and loose enough not to cause any breathing issues. It has worked for me for years and you cannot pull any pieces off to worry about falling down in the oil and no splash at all, hope this has been helpful.
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10-02-2016, 09:12 PM | #13 |
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Re: oil filler tube and cap
Orientation of the baffles is important, according to the Ford Service Bulletins. When I last rebuilt my engine I rather mindlessly installed the filler tube, paying no attention to the orientation of the baffles. I should have twisted the filler tube 90 degrees counter clockwise but instead had it so that it acted like an oil scoop and leaked out the cap BIG TIME. Also, my counterweights on the crank made it worse. Worth checking it out-I don't recall the page in the Ford Service Bulletins but can look it up for you-they were explicit in baffle orientation.
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10-02-2016, 10:40 PM | #14 | |
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Re: oil filler tube and cap
Quote:
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10-02-2016, 10:54 PM | #15 |
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Re: oil filler tube and cap
I'd like to know the correct orientation too. I don't have a problem puttering around town, but my starter gets covered with oil if I run 45-50 mph for a long time. And I usually run below the full mark.
Last edited by Fred S; 10-03-2016 at 10:09 PM. |
10-03-2016, 07:56 AM | #16 |
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Re: oil filler tube and cap
I extended my filler tube . no problems
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10-03-2016, 12:49 PM | #17 |
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Re: oil filler tube and cap
Blowby at the oil filler cap is generally caused by excess crankcase pressure . This is caused by worn cylinder bores or worn valve guides or both . When the engines fires some exhaust gasses bypass the rings or valve guides, this causes oil to be blown out of the filler tube/cap . The engine will run happily in this condition for many miles but it is a drag having oil on the firewall .One sure cure is to fit an AA filler tube and cap this does work very well , I have this setup on several cars with high mileage engines . The after market tube extensions work fine too . I would try everything first before putting stuff in the tube . IMHO .
John in sunny evening Suffolk County England . |
10-03-2016, 01:46 PM | #18 |
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Re: oil filler tube and cap
Thinking about it it maybe you dont have an AA filler tube in USA . It is the same length as the regular tube but about two and a half inch dia. as opposed to the one and a half inch dia . The extra dia. cuts down the velocity of the blowby enough to stop oil escaping . BB trucks in USA had these they seem fairly common at swap meets and look way cooler than those accessory tall tubes and dangling pipes !!!
John in same place no changes . |
10-03-2016, 02:50 PM | #19 |
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Re: oil filler tube and cap
SK, this is the pipe that Bill mentioned. I installed the same and it works.
http://www.snydersantiqueauto.com/oil-breather |
10-03-2016, 09:37 PM | #20 |
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Re: oil filler tube and cap
I got this information out of the yellow Dan Post book, which technically is not the body of Service Bulletins but a compilation and condensation of them. I am looking at Page 454, upper left hand entitled "New Breather Pipe." It says: "To lessen any possibility of oil working past the breather pipe, breather pipe A-6763 has been adopted (see Fig. 896). The baffles in the new pipe point downward and towards the center of the pipe. This directs the oil away from the edge of the pipe and lessens any possibility of oil working past the breather cap."
Obviously, for an old tired engine with blowby this is not a cure-all. I find, in my engine with counterweights, that the counterweights really sling the oil so I did not have a blowby problem. After orienting the filler tube as shown in Fig. 896 (I can scan it and post it this weekend) my problem was dramatically reduced. YMMV, of course..... |
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